OMNIA SCIENTIA

OMNIA SCIENTIA

OMNIA SCIENTIA

OMNIA SCIENTIA

OMNIA SCIENTIA

PHYSICS & CHEMISTRY

PHYSICS & CHEMISTRY

PHYSICS & CHEMISTRY

PHYSICS & CHEMISTRY

PHYSICS & CHEMISTRY

FUNDAMENTAL CONSTANTS

FUNDAMENTAL CONSTANTS

FUNDAMENTAL CONSTANTS

FUNDAMENTAL CONSTANTS

FUNDAMENTAL CONSTANTS

335 PHYSICAL CONSTANTS

335 PHYSICAL CONSTANTS

335 PHYSICAL CONSTANTS

335 PHYSICAL CONSTANTS

335 PHYSICAL CONSTANTS

UNIVERSAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

UNIVERSAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

UNIVERSAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

UNIVERSAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

UNIVERSAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

CONSTANT VALUE UNCERTAINTY UNIT

characteristic impedance of vacuum 376.730 313 461… Exact ohm

electric constant 8.854 187 817… e-12 Exact F m^-1

magnetic constant 12.566 370 614… e-7 Exact N A^-2

Newtonian constant of gravitation 6.674 08 e-11 0.000 31 e-11 m^3 kg^-1 s^-2

Newtonian constant of gravitation over h-bar c 6.708 61 e-39 0.000 31 e-39 (GeV/c^2) ^-2

Planck constant 6.626 070 040 e-34 0.000 000 081 e-34 J s

Planck constant in eV s 4.135 667 662 e-15 0.000 000 025 e-15 eV s

Planck constant over 2 pi 1.054 571 800 e-34 0.000 000 013 e-34 J s

Planck constant over 2 pi in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

Planck constant over 2 pi times c in MeV fm 197.326 9788 0.000 0012 MeV fm

Planck length 1.616 229 e-35 0.000 038 e-35 m

Planck mass 2.176 470 e-8 0.000 051 e-8 kg

Planck mass energy equivalent in GeV 1.220 910 e19 0.000 029 e19 GeV

Planck temperature 1.416 808 e32 0.000 033 e32 K

Planck time 5.391 16 e-44 0.000 13 e-44 s

speed of light in vacuum 299 792 458 Exact m s^-1

CONSTANT VALUE UNCERTAINTY UNIT

characteristic impedance of vacuum 376.730 313 461… Exact ohm

electric constant 8.854 187 817… e-12 Exact F m^-1

magnetic constant 12.566 370 614… e-7 Exact N A^-2

Newtonian constant of gravitation 6.674 08 e-11 0.000 31 e-11 m^3 kg^-1 s^-2

Newtonian constant of gravitation over h-bar c 6.708 61 e-39 0.000 31 e-39 (GeV/c^2) ^-2

Planck constant 6.626 070 040 e-34 0.000 000 081 e-34 J s

Planck constant in eV s 4.135 667 662 e-15 0.000 000 025 e-15 eV s

Planck constant over 2 pi 1.054 571 800 e-34 0.000 000 013 e-34 J s

Planck constant over 2 pi in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

Planck constant over 2 pi times c in MeV fm 197.326 9788 0.000 0012 MeV fm

Planck length 1.616 229 e-35 0.000 038 e-35 m

Planck mass 2.176 470 e-8 0.000 051 e-8 kg

Planck mass energy equivalent in GeV 1.220 910 e19 0.000 029 e19 GeV

Planck temperature 1.416 808 e32 0.000 033 e32 K

Planck time 5.391 16 e-44 0.000 13 e-44 s

speed of light in vacuum 299 792 458 Exact m s^-1

CONSTANT VALUE UNCERTAINTY UNIT

characteristic impedance of vacuum 376.730 313 461… Exact ohm

electric constant 8.854 187 817… e-12 Exact F m^-1

magnetic constant 12.566 370 614… e-7 Exact N A^-2

Newtonian constant of gravitation 6.674 08 e-11 0.000 31 e-11 m^3 kg^-1 s^-2

Newtonian constant of gravitation over h-bar c 6.708 61 e-39 0.000 31 e-39 (GeV/c^2) ^-2

Planck constant 6.626 070 040 e-34 0.000 000 081 e-34 J s

Planck constant in eV s 4.135 667 662 e-15 0.000 000 025 e-15 eV s

Planck constant over 2 pi 1.054 571 800 e-34 0.000 000 013 e-34 J s

Planck constant over 2 pi in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

Planck constant over 2 pi times c in MeV fm 197.326 9788 0.000 0012 MeV fm

Planck length 1.616 229 e-35 0.000 038 e-35 m

Planck mass 2.176 470 e-8 0.000 051 e-8 kg

Planck mass energy equivalent in GeV 1.220 910 e19 0.000 029 e19 GeV

Planck temperature 1.416 808 e32 0.000 033 e32 K

Planck time 5.391 16 e-44 0.000 13 e-44 s

speed of light in vacuum 299 792 458 Exact m s^-1

CONSTANT VALUE UNCERTAINTY UNIT

characteristic impedance of vacuum 376.730 313 461… Exact ohm

electric constant 8.854 187 817… e-12 Exact F m^-1

magnetic constant 12.566 370 614… e-7 Exact N A^-2

Newtonian constant of gravitation 6.674 08 e-11 0.000 31 e-11 m^3 kg^-1 s^-2

Newtonian constant of gravitation over h-bar c 6.708 61 e-39 0.000 31 e-39 (GeV/c^2) ^-2

Planck constant 6.626 070 040 e-34 0.000 000 081 e-34 J s

Planck constant in eV s 4.135 667 662 e-15 0.000 000 025 e-15 eV s

Planck constant over 2 pi 1.054 571 800 e-34 0.000 000 013 e-34 J s

Planck constant over 2 pi in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

Planck constant over 2 pi times c in MeV fm 197.326 9788 0.000 0012 MeV fm

Planck length 1.616 229 e-35 0.000 038 e-35 m

Planck mass 2.176 470 e-8 0.000 051 e-8 kg

Planck mass energy equivalent in GeV 1.220 910 e19 0.000 029 e19 GeV

Planck temperature 1.416 808 e32 0.000 033 e32 K

Planck time 5.391 16 e-44 0.000 13 e-44 s

speed of light in vacuum 299 792 458 Exact m s^-1

CONSTANT VALUE UNIT

characteristic impedance of vacuum 376.730 313 461… ohm

electric constant 8.854 187 817… e-12 F m^-1

magnetic constant 12.566 370 614… e-7 N A^-2

Newtonian constant of gravitation 6.674 08 e-11 m^3 kg^-1 s^-2

Newtonian gravitation over h-bar c 6.708 61 e-39 (GeV/c^2) ^-2

Planck constant 6.626 070 040 e-34 J s

Planck constant in eV s 4.135 667 662 e-15 eV s

Planck constant over 2 pi 1.054 571 800 e-34 J s

Planck constant over 2 pi in eV s 6.582 119 514 e-16 eV s

Planck constant over 2 pi times c in MeV fm 197.326 9788 MeV fm

Planck length 1.616 229 e-35 m

Planck mass 2.176 470 e-8 kg

Planck mass energy equivalent in GeV 1.220 910 e19 GeV

Planck temperature 1.416 808 e32 K

Planck time 5.391 16 e-44 s

speed of light in vacuum 299 792 458 m s^-1

ELECTROMAGNETIC CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

ELECTROMAGNETIC CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

ELECTROMAGNETIC CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

ELECTROMAGNETIC CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

ELECTROMAGNETIC CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

CONSTANT VALUE UNCERTAINTY UNIT

Bohr magneton 927.400 9994 e-26 0.000 0057 e-26 J T^-1

Bohr magneton in eV/T 5.788 381 8012 e-5 0.000 000 0026 e-5 eV T^-1

Bohr magneton in Hz/T 13.996 245 042 e9 0.000 000 086 e9 Hz T^-1

Bohr magneton in inverse meters per tesla 46.686 448 14 0.000 000 29 m^-1 T^-1

Bohr magneton in K/T 0.671 714 05 0.000 000 39 K T^-1

conductance quantum 7.748 091 7310 e-5 0.000 000 0018 e-5 S

elementary charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

elementary charge over h 2.417 989 262 e14 0.000 000 015 e14 A J^-1

inverse of conductance quantum 12 906.403 7278 0.000 0029 ohm

Josephson constant 483 597.8525 e9 0.0030 e9 Hz V^-1

magnetic flux quantum 2.067 833 831 e-15 0.000 000 013 e-15 Wb

nuclear magneton 5.050 783 699 e-27 0.000 000 031 e-27 J T^-1

nuclear magneton in eV/T 3.152 451 2550 e-8 0.000 000 0015 e-8 eV T^-1

nuclear magneton in inverse meters per tesla 2.542 623 432 e-2 0.000 000 016 e-2 m^-1 T^-1

nuclear magneton in K/T 3.658 2690 e-4 0.000 0021 e-4 K T^-1

nuclear magneton in MHz/T 7.622 593 285 0.000 000 047 MHz T^-1

von Klitzing constant 25 812.807 4555 0.000 0059 ohm

CONSTANT VALUE UNCERTAINTY UNIT

Bohr magneton 927.400 9994 e-26 0.000 0057 e-26 J T^-1

Bohr magneton in eV/T 5.788 381 8012 e-5 0.000 000 0026 e-5 eV T^-1

Bohr magneton in Hz/T 13.996 245 042 e9 0.000 000 086 e9 Hz T^-1

Bohr magneton in inverse meters per tesla 46.686 448 14 0.000 000 29 m^-1 T^-1

Bohr magneton in K/T 0.671 714 05 0.000 000 39 K T^-1

conductance quantum 7.748 091 7310 e-5 0.000 000 0018 e-5 S

elementary charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

elementary charge over h 2.417 989 262 e14 0.000 000 015 e14 A J^-1

inverse of conductance quantum 12 906.403 7278 0.000 0029 ohm

Josephson constant 483 597.8525 e9 0.0030 e9 Hz V^-1

magnetic flux quantum 2.067 833 831 e-15 0.000 000 013 e-15 Wb

nuclear magneton 5.050 783 699 e-27 0.000 000 031 e-27 J T^-1

nuclear magneton in eV/T 3.152 451 2550 e-8 0.000 000 0015 e-8 eV T^-1

nuclear magneton in inverse meters per tesla 2.542 623 432 e-2 0.000 000 016 e-2 m^-1 T^-1

nuclear magneton in K/T 3.658 2690 e-4 0.000 0021 e-4 K T^-1

nuclear magneton in MHz/T 7.622 593 285 0.000 000 047 MHz T^-1

von Klitzing constant 25 812.807 4555 0.000 0059 ohm

CONSTANT VALUE UNCERTAINTY UNIT

Bohr magneton 927.400 9994 e-26 0.000 0057 e-26 J T^-1

Bohr magneton in eV/T 5.788 381 8012 e-5 0.000 000 0026 e-5 eV T^-1

Bohr magneton in Hz/T 13.996 245 042 e9 0.000 000 086 e9 Hz T^-1

Bohr magneton in inverse meters per tesla 46.686 448 14 0.000 000 29 m^-1 T^-1

Bohr magneton in K/T 0.671 714 05 0.000 000 39 K T^-1

conductance quantum 7.748 091 7310 e-5 0.000 000 0018 e-5 S

elementary charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

elementary charge over h 2.417 989 262 e14 0.000 000 015 e14 A J^-1

inverse of conductance quantum 12 906.403 7278 0.000 0029 ohm

Josephson constant 483 597.8525 e9 0.0030 e9 Hz V^-1

magnetic flux quantum 2.067 833 831 e-15 0.000 000 013 e-15 Wb

nuclear magneton 5.050 783 699 e-27 0.000 000 031 e-27 J T^-1

nuclear magneton in eV/T 3.152 451 2550 e-8 0.000 000 0015 e-8 eV T^-1

nuclear magneton in inverse meters per tesla 2.542 623 432 e-2 0.000 000 016 e-2 m^-1 T^-1

nuclear magneton in K/T 3.658 2690 e-4 0.000 0021 e-4 K T^-1

nuclear magneton in MHz/T 7.622 593 285 0.000 000 047 MHz T^-1

von Klitzing constant 25 812.807 4555 0.000 0059 ohm

CONSTANT VALUE UNCERTAINTY UNIT

Bohr magneton 927.400 9994 e-26 0.000 0057 e-26 J T^-1

Bohr magneton in eV/T 5.788 381 8012 e-5 0.000 000 0026 e-5 eV T^-1

Bohr magneton in Hz/T 13.996 245 042 e9 0.000 000 086 e9 Hz T^-1

Bohr magneton in inverse meters per tesla 46.686 448 14 0.000 000 29 m^-1 T^-1

Bohr magneton in K/T 0.671 714 05 0.000 000 39 K T^-1

conductance quantum 7.748 091 7310 e-5 0.000 000 0018 e-5 S

elementary charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

elementary charge over h 2.417 989 262 e14 0.000 000 015 e14 A J^-1

inverse of conductance quantum 12 906.403 7278 0.000 0029 ohm

Josephson constant 483 597.8525 e9 0.0030 e9 Hz V^-1

magnetic flux quantum 2.067 833 831 e-15 0.000 000 013 e-15 Wb

nuclear magneton 5.050 783 699 e-27 0.000 000 031 e-27 J T^-1

nuclear magneton in eV/T 3.152 451 2550 e-8 0.000 000 0015 e-8 eV T^-1

nuclear magneton in inverse meters per tesla 2.542 623 432 e-2 0.000 000 016 e-2 m^-1 T^-1

nuclear magneton in K/T 3.658 2690 e-4 0.000 0021 e-4 K T^-1

nuclear magneton in MHz/T 7.622 593 285 0.000 000 047 MHz T^-1

von Klitzing constant 25 812.807 4555 0.000 0059 ohm

CONSTANT VALUE UNIT

Bohr magneton 927.400 9994 e-26 J T^-1

Bohr magneton in eV/T 5.788 381 8012 e-5 eV T^-1

Bohr magneton in Hz/T 13.996 245 042 e9 Hz T^-1

Bohr magneton in inverse meters per tesla 46.686 448 14 m^-1 T^-1

Bohr magneton in K/T 0.671 714 05 K T^-1

conductance quantum 7.748 091 7310 e-5 S

elementary charge 1.602 176 6208 e-19 C

elementary charge over h 2.417 989 262 e14 A J^-1

inverse of conductance quantum 12 906.403 7278 ohm

Josephson constant 483 597.8525 e9 Hz V^-1

magnetic flux quantum 2.067 833 831 e-15 Wb

nuclear magneton 5.050 783 699 e-27 J T^-1

nuclear magneton in eV/T 3.152 451 2550 e-8 eV T^-1

nuclear magneton in inverse meters per tesla 2.542 623 432 e-2 m^-1 T^-1

nuclear magneton in K/T 3.658 2690 e-4 K T^-1

nuclear magneton in MHz/T 7.622 593 285 MHz T^-1

von Klitzing constant 25 812.807 4555 ohm

PHYSICO-CHEMICAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

PHYSICO-CHEMICAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

PHYSICO-CHEMICAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

PHYSICO-CHEMICAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

PHYSICO-CHEMICAL CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

CONSTANT VALUE UNCERTAINTY UNIT

atomic mass constant 1.660 539 040 e-27 0.000 000 020 e-27 kg

atomic mass constant energy equivalent 1.492 418 062 e-10 0.000 000 018 e-10 J

atomic mass constant energy equivalent in MeV 931.494 0954 0.000 0057 MeV

Avogadro constant 6.022 140 857 e23 0.000 000 074 e23 mol^-1

Boltzmann constant 1.380 648 52 e-23 0.000 000 79 e-23 J K^-1

Boltzmann constant in eV/K 8.617 3303 e-5 0.000 0050 e-5 eV K^-1

Boltzmann constant in Hz/K 2.083 6612 e10 0.000 0012 e10 Hz K^-1

Boltzmann constant in inverse meters per kelvin 69.503 457 0.000 040 m^-1 K^-1

Faraday constant 96 485.332 89 0.000 59 C mol^-1

Faraday constant for conventional electric current 96 485.3251 0.001 2 C_90 mol^-1

first radiation constant 3.741 771 790 e-16 0.000 000 046 e-16 W m^2

first radiation constant for spectral radiance 1.191 042 953 e-16 0.000 000 015 e-16 W m^2 sr^-1

Loschmidt constant (273.15 K, 101.325 kPa) 2.686 7811 e25 0.000 0015 e25 m^-3

molar gas constant 8.314 4598 0.000 0048 J mol^-1 K^-1

molar Planck constant 3.990 312 7110 e-10 0.000 000 0018 e-10 J s mol^-1

molar Planck constant times c 0.119 626 565 582 0.000 000 000 054 J m mol^-1

molar volume of ideal gas (273.15 K, 100 kPa) 22.710 947 e-3 0.000 013 e-3 m^3 mol^-1

molar volume of ideal gas (273.15 K, 101.325 kPa) 22.413 962 e-3 0.000 013 e-3 m^3 mol^-1

Sackur-Tetrode constant (1 K, 100 kPa) -1.151 7084 0.000 0014 –

Sackur-Tetrode constant (1 K, 101.325 kPa) -1.164 8714 0.000 0014 –

second radiation constant 1.438 777 36 e-2 0.000 000 83 e-2 m K

Stefan-Boltzmann constant 5.670 367 e-8 0.000 013 e-8 W m^-2 K^-4

Wien frequency displacement law constant 5.878 9238 e10 0.000 0034 e10 Hz K^-1

Wien wavelength displacement law constant 2.897 7729 e-3 0.000 0017 e-3 m K

CONSTANT VALUE UNCERTAINTY UNIT

atomic mass constant 1.660 539 040 e-27 0.000 000 020 e-27 kg

atomic mass constant energy equivalent 1.492 418 062 e-10 0.000 000 018 e-10 J

atomic mass constant energy equivalent in MeV 931.494 0954 0.000 0057 MeV

Avogadro constant 6.022 140 857 e23 0.000 000 074 e23 mol^-1

Boltzmann constant 1.380 648 52 e-23 0.000 000 79 e-23 J K^-1

Boltzmann constant in eV/K 8.617 3303 e-5 0.000 0050 e-5 eV K^-1

Boltzmann constant in Hz/K 2.083 6612 e10 0.000 0012 e10 Hz K^-1

Boltzmann constant in inverse meters per kelvin 69.503 457 0.000 040 m^-1 K^-1

Faraday constant 96 485.332 89 0.000 59 C mol^-1

Faraday constant for conventional electric current 96 485.3251 0.001 2 C_90 mol^-1

first radiation constant 3.741 771 790 e-16 0.000 000 046 e-16 W m^2

first radiation constant for spectral radiance 1.191 042 953 e-16 0.000 000 015 e-16 W m^2 sr^-1

Loschmidt constant (273.15 K, 101.325 kPa) 2.686 7811 e25 0.000 0015 e25 m^-3

molar gas constant 8.314 4598 0.000 0048 J mol^-1 K^-1

molar Planck constant 3.990 312 7110 e-10 0.000 000 0018 e-10 J s mol^-1

molar Planck constant times c 0.119 626 565 582 0.000 000 000 054 J m mol^-1

molar volume of ideal gas (273.15 K, 100 kPa) 22.710 947 e-3 0.000 013 e-3 m^3 mol^-1

molar volume of ideal gas (273.15 K, 101.325 kPa) 22.413 962 e-3 0.000 013 e-3 m^3 mol^-1

Sackur-Tetrode constant (1 K, 100 kPa) -1.151 7084 0.000 0014 –

Sackur-Tetrode constant (1 K, 101.325 kPa) -1.164 8714 0.000 0014 –

second radiation constant 1.438 777 36 e-2 0.000 000 83 e-2 m K

Stefan-Boltzmann constant 5.670 367 e-8 0.000 013 e-8 W m^-2 K^-4

Wien frequency displacement law constant 5.878 9238 e10 0.000 0034 e10 Hz K^-1

Wien wavelength displacement law constant 2.897 7729 e-3 0.000 0017 e-3 m K

CONSTANT VALUE UNCERTAINTY UNIT

atomic mass constant 1.660 539 040 e-27 0.000 000 020 e-27 kg

atomic mass constant energy equivalent 1.492 418 062 e-10 0.000 000 018 e-10 J

atomic mass constant energy equivalent in MeV 931.494 0954 0.000 0057 MeV

Avogadro constant 6.022 140 857 e23 0.000 000 074 e23 mol^-1

Boltzmann constant 1.380 648 52 e-23 0.000 000 79 e-23 J K^-1

Boltzmann constant in eV/K 8.617 3303 e-5 0.000 0050 e-5 eV K^-1

Boltzmann constant in Hz/K 2.083 6612 e10 0.000 0012 e10 Hz K^-1

Boltzmann constant in inverse meters per kelvin 69.503 457 0.000 040 m^-1 K^-1

Faraday constant 96 485.332 89 0.000 59 C mol^-1

Faraday constant for conventional electric current 96 485.3251 0.001 2 C_90 mol^-1

first radiation constant 3.741 771 790 e-16 0.000 000 046 e-16 W m^2

first radiation constant for spectral radiance 1.191 042 953 e-16 0.000 000 015 e-16 W m^2 sr^-1

Loschmidt constant (273.15 K, 101.325 kPa) 2.686 7811 e25 0.000 0015 e25 m^-3

molar gas constant 8.314 4598 0.000 0048 J mol^-1 K^-1

molar Planck constant 3.990 312 7110 e-10 0.000 000 0018 e-10 J s mol^-1

molar Planck constant times c 0.119 626 565 582 0.000 000 000 054 J m mol^-1

molar volume of ideal gas (273.15 K, 100 kPa) 22.710 947 e-3 0.000 013 e-3 m^3 mol^-1

molar volume of ideal gas (273.15 K, 101.325 kPa) 22.413 962 e-3 0.000 013 e-3 m^3 mol^-1

Sackur-Tetrode constant (1 K, 100 kPa) -1.151 7084 0.000 0014 –

Sackur-Tetrode constant (1 K, 101.325 kPa) -1.164 8714 0.000 0014 –

second radiation constant 1.438 777 36 e-2 0.000 000 83 e-2 m K

Stefan-Boltzmann constant 5.670 367 e-8 0.000 013 e-8 W m^-2 K^-4

Wien frequency displacement law constant 5.878 9238 e10 0.000 0034 e10 Hz K^-1

Wien wavelength displacement law constant 2.897 7729 e-3 0.000 0017 e-3 m K

CONSTANT VALUE UNCERTAINTY UNIT

atomic mass constant 1.660 539 040 e-27 0.000 000 020 e-27 kg

atomic mass constant energy equivalent 1.492 418 062 e-10 0.000 000 018 e-10 J

atomic mass constant energy equivalent in MeV 931.494 0954 0.000 0057 MeV

Avogadro constant 6.022 140 857 e23 0.000 000 074 e23 mol^-1

Boltzmann constant 1.380 648 52 e-23 0.000 000 79 e-23 J K^-1

Boltzmann constant in eV/K 8.617 3303 e-5 0.000 0050 e-5 eV K^-1

Boltzmann constant in Hz/K 2.083 6612 e10 0.000 0012 e10 Hz K^-1

Boltzmann constant in inverse meters per kelvin 69.503 457 0.000 040 m^-1 K^-1

Faraday constant 96 485.332 89 0.000 59 C mol^-1

Faraday constant for conventional electric current 96 485.3251 0.001 2 C_90 mol^-1

first radiation constant 3.741 771 790 e-16 0.000 000 046 e-16 W m^2

first radiation constant for spectral radiance 1.191 042 953 e-16 0.000 000 015 e-16 W m^2 sr^-1

Loschmidt constant (273.15 K, 101.325 kPa) 2.686 7811 e25 0.000 0015 e25 m^-3

molar gas constant 8.314 4598 0.000 0048 J mol^-1 K^-1

molar Planck constant 3.990 312 7110 e-10 0.000 000 0018 e-10 J s mol^-1

molar Planck constant times c 0.119 626 565 582 0.000 000 000 054 J m mol^-1

molar volume of ideal gas (273.15 K, 100 kPa) 22.710 947 e-3 0.000 013 e-3 m^3 mol^-1

molar volume of ideal gas (273.15 K, 101.325 kPa) 22.413 962 e-3 0.000 013 e-3 m^3 mol^-1

Sackur-Tetrode constant (1 K, 100 kPa) -1.151 7084 0.000 0014 –

Sackur-Tetrode constant (1 K, 101.325 kPa) -1.164 8714 0.000 0014 –

second radiation constant 1.438 777 36 e-2 0.000 000 83 e-2 m K

Stefan-Boltzmann constant 5.670 367 e-8 0.000 013 e-8 W m^-2 K^-4

Wien frequency displacement law constant 5.878 9238 e10 0.000 0034 e10 Hz K^-1

Wien wavelength displacement law constant 2.897 7729 e-3 0.000 0017 e-3 m K

CONSTANT VALUE UNIT

atomic mass constant 1.660 539 040 e-27 kg

atomic mass constant energy equivalent 1.492 418 062 e-10 J

atomic mass constant energy equivalent in MeV 931.494 0954 MeV

Avogadro constant 6.022 140 857 e23 mol^-1

Boltzmann constant 1.380 648 52 e-23 J K^-1

Boltzmann constant in eV/K 8.617 3303 e-5 eV K^-1

Boltzmann constant in Hz/K 2.083 6612 e10 Hz K^-1

Boltzmann constant in inverse meters per kelvin 69.503 457 m^-1 K^-1

Faraday constant 96 485.332 89 C mol^-1

Faraday constant for electric current 96 485.3251 C_90 mol^-1

first radiation constant 3.741 771 790 e-16 W m^2

first radiation constant for spectral radiance 1.191 042 953 e-16 W m^2 sr^-1

Loschmidt constant (273.15 K, 101.325 kPa) 2.686 7811 e25 m^-3

molar gas constant 8.314 4598 J mol^-1 K^-1

molar Planck constant 3.990 312 7110 e-10 J s mol^-1

molar Planck constant times c 0.119 626 565 582 J m mol^-1

molar volume of ideal gas (100 kPa) 22.710 947 e-3 m^3 mol^-1

molar volume of ideal gas (101.325 kPa) 22.413 962 e-3 m^3 mol^-1

Sackur-Tetrode constant (1 K, 100 kPa) -1.151 7084 –

Sackur-Tetrode constant (1 K, 101.325 kPa) -1.164 8714 –

second radiation constant 1.438 777 36 e-2 m K

Stefan-Boltzmann constant 5.670 367 e-8 W m^-2 K^-4

Wien frequency displacement law constant 5.878 9238 e10 Hz K^-1

Wien wavelength displacement law constant 2.897 7729 e-3 m K

ATOMIC-NUCLEAR CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

ATOMIC-NUCLEAR CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

ATOMIC-NUCLEAR CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

ATOMIC-NUCLEAR CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

ATOMIC-NUCLEAR CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

CONSTANT VALUE UNCERTAINTY UNIT

alpha particle mass 6.644 657 230 e-27 0.000 000 082 e-27 kg

alpha particle mass energy equivalent 5.971 920 097 e-10 0.000 000 073 e-10 J

alpha particle mass energy equivalent in MeV 3727.379 378 0.000 023 MeV

alpha particle mass in u 4.001 506 179 127 0.000 000 000 063 u

alpha particle molar mass 4.001 506 179 127 e-3 0.000 000 000 063 e-3 kg mol^-1

alpha particle-electron mass ratio 7294.299 541 36 0.000 000 24 –

alpha particle-proton mass ratio 3.972 599 689 07 0.000 000 000 36 –

Bohr radius 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

classical electron radius 2.817 940 3227 e-15 0.000 000 0019 e-15 m

Compton wavelength 2.426 310 2367 e-12 0.000 000 0011 e-12 m

Compton wavelength over 2 pi 386.159 267 64 e-15 0.000 000 18 e-15 m

deuteron g factor 0.857 438 2311 0.000 000 0048 –

deuteron magnetic moment 0.433 073 5040 e-26 0.000 000 0036 e-26 J T^-1

deuteron mag. mom. to Bohr magneton ratio 0.466 975 4554 e-3 0.000 000 0026 e-3 –

deuteron mag. mom. to nuclear magneton ratio 0.857 438 2311 0.000 000 0048 –

deuteron mass 3.343 583 719 e-27 0.000 000 041 e-27 kg

deuteron mass energy equivalent 3.005 063 183 e-10 0.000 000 037 e-10 J

deuteron mass energy equivalent in MeV 1875.612 928 0.000 012 MeV

deuteron mass in u 2.013 553 212 745 0.000 000 000 040 u

deuteron molar mass 2.013 553 212 745 e-3 0.000 000 000 040 e-3 kg mol^-1

deuteron-neutron magnetic moment ratio -0.448 206 52 0.000 000 11 –

deuteron-proton magnetic moment ratio 0.307 012 2077 0.000 000 0015 –

deuteron-proton mass ratio 1.999 007 500 87 0.000 000 000 19 –

deuteron RMS charge radius 2.1413 e-15 0.0025 e-15 m

electron charge to mass quotient -1.758 820 024 e11 0.000 000 011 e11 C kg^-1

electron-deuteron magnetic moment ratio -2143.923 499 0.000 012 –

electron-deuteron mass ratio 2.724 437 107 484 e-4 0.000 000 000 096 e-4 –

electron g factor -2.002 319 304 361 82 0.000 000 000 000 52 –

electron gyromagnetic ratio 1.760 859 644 e11 0.000 000 011 e11 s^-1 T^-1

electron gyromagnetic ratio over 2 pi 28 024.951 64 0.000 17 MHz T^-1

electron-helion mass ratio 1.819 543 074 854 e-4 0.000 000 000 088 e-4 –

electron magnetic moment -928.476 4620 e-26 0.000 0057 e-26 J T^-1

electron magnetic moment anomaly 1.159 652 180 91 e-3 0.000 000 000 26 e-3 –

electron mag. mom. to Bohr magneton ratio -1.001 159 652 180 91 0.000 000 000 000 26 –

electron mag. mom. to nuclear magneton ratio -1838.281 972 34 0.000 000 17 –

electron mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

electron mass energy equivalent 8.187 105 65 e-14 0.000 000 10 e-14 J

electron mass energy equivalent in MeV 0.510 998 9461 0.000 000 0031 MeV

electron mass in u 5.485 799 090 70 e-4 0.000 000 000 16 e-4 u

electron molar mass 5.485 799 090 70 e-7 0.000 000 000 16 e-7 kg mol^-1

electron-muon magnetic moment ratio 206.766 9880 0.000 0046 –

electron-muon mass ratio 4.836 331 70 e-3 0.000 000 11 e-3 –

electron-neutron magnetic moment ratio 960.920 50 0.000 23 –

electron-neutron mass ratio 5.438 673 4428 e-4 0.000 000 0027 e-4 –

electron-proton magnetic moment ratio -658.210 6866 0.000 0020 –

electron-proton mass ratio 5.446 170 213 52 e-4 0.000 000 000 52 e-4 –

electron-tau mass ratio 2.875 92 e-4 0.000 26 e-4 –

electron to alpha particle mass ratio 1.370 933 554 798 e-4 0.000 000 000 045 e-4 –

electron to shielded helion mag. mom. ratio 864.058 257 0.000 010 –

electron to shielded proton mag. mom. ratio -658.227 5971 0.000 0072 –

electron-triton mass ratio 1.819 200 062 203 e-4 0.000 000 000 084 e-4 –

Fermi coupling constant 1.166 3787 e-5 0.000 0006 e-5 GeV^-2

fine-structure constant 7.297 352 5664 e-3 0.000 000 0017 e-3 –

Hartree energy 4.359 744 650 e-18 0.000 000 054 e-18 J

Hartree energy in eV 27.211 386 02 0.000 000 17 eV

helion-electron mass ratio 5495.885 279 22 0.000 000 27 –

helion g factor -4.255 250 616 0.000 000 050 –

helion magnetic moment -1.074 617 522 e-26 0.000 000 014 e-26 J T^-1

helion mag. mom. to Bohr magneton ratio -1.158 740 958 e-3 0.000 000 014 e-3 –

helion mag. mom. to nuclear magneton ratio -2.127 625 308 0.000 000 025 –

helion mass 5.006 412 700 e-27 0.000 000 062 e-27 kg

helion mass energy equivalent 4.499 539 341 e-10 0.000 000 055 e-10 J

helion mass energy equivalent in MeV 2808.391 586 0.000 017 MeV

helion mass in u 3.014 932 246 73 0.000 000 000 12 u

helion molar mass 3.014 932 246 73 e-3 0.000 000 000 12 e-3 kg mol^-1

helion-proton mass ratio 2.993 152 670 46 0.000 000 000 29 –

inverse fine-structure constant 137.035 999 139 0.000 000 031 –

muon Compton wavelength 11.734 441 11 e-15 0.000 000 26 e-15 m

muon Compton wavelength over 2 pi 1.867 594 308 e-15 0.000 000 042 e-15 m

muon-electron mass ratio 206.768 2826 0.000 0046 –

muon g factor -2.002 331 8418 0.000 000 0013 –

muon magnetic moment -4.490 448 26 e-26 0.000 000 10 e-26 J T^-1

muon magnetic moment anomaly 1.165 920 89 e-3 0.000 000 63 e-3 –

muon mag. mom. to Bohr magneton ratio -4.841 970 48 e-3 0.000 000 11 e-3 –

muon mag. mom. to nuclear magneton ratio -8.890 597 05 0.000 000 20 –

muon mass 1.883 531 594 e-28 0.000 000 048 e-28 kg

muon mass energy equivalent 1.692 833 774 e-11 0.000 000 043 e-11 J

muon mass energy equivalent in MeV 105.658 3745 0.000 0024 MeV

muon mass in u 0.113 428 9257 0.000 000 0025 u

muon molar mass 0.113 428 9257 e-3 0.000 000 0025 e-3 kg mol^-1

muon-neutron mass ratio 0.112 454 5167 0.000 000 0025 –

muon-proton magnetic moment ratio -3.183 345 142 0.000 000 071 –

muon-proton mass ratio 0.112 609 5262 0.000 000 0025 –

muon-tau mass ratio 5.946 49 e-2 0.000 54 e-2 –

neutron Compton wavelength 1.319 590 904 81 e-15 0.000 000 000 88 e-15 m

neutron Compton wavelength over 2 pi 0.210 019 415 36 e-15 0.000 000 000 14 e-15 m

neutron-electron magnetic moment ratio 1.040 668 82 e-3 0.000 000 25 e-3 –

neutron-electron mass ratio 1838.683 661 58 0.000 000 90 –

neutron g factor -3.826 085 45 0.000 000 90 –

neutron gyromagnetic ratio 1.832 471 72 e8 0.000 000 43 e8 s^-1 T^-1

neutron gyromagnetic ratio over 2 pi 29.164 6933 0.000 0069 MHz T^-1

neutron magnetic moment -0.966 236 50 e-26 0.000 000 23 e-26 J T^-1

neutron mag. mom. to Bohr magneton ratio -1.041 875 63 e-3 0.000 000 25 e-3 –

neutron mag. mom. to nuclear magneton ratio -1.913 042 73 0.000 000 45 –

neutron mass 1.674 927 471 e-27 0.000 000 021 e-27 kg

neutron mass energy equivalent 1.505 349 739 e-10 0.000 000 019 e-10 J

neutron mass energy equivalent in MeV 939.565 4133 0.000 0058 MeV

neutron mass in u 1.008 664 915 88 0.000 000 000 49 u

neutron molar mass 1.008 664 915 88 e-3 0.000 000 000 49 e-3 kg mol^-1

neutron-muon mass ratio 8.892 484 08 0.000 000 20 –

neutron-proton magnetic moment ratio -0.684 979 34 0.000 000 16 –

neutron-proton mass difference 2.305 573 77 e-30 0.000 000 85 e-30 –

neutron-proton mass diff. energy equiv. 2.072 146 37 e-13 0.000 000 76 e-13 –

neutron-proton mass diff. energy equiv. in MeV 1.293 332 05 0.000 000 48 –

neutron-proton mass difference in u 0.001 388 449 00 0.000 000 000 51 –

neutron-proton mass ratio 1.001 378 418 98 0.000 000 000 51 –

neutron-tau mass ratio 0.528 790 0.000 048 –

neutron to shielded proton mag. mom. ratio -0.684 996 94 0.000 000 16 –

proton charge to mass quotient 9.578 833 226 e7 0.000 000 059 e7 C kg^-1

proton Compton wavelength 1.321 409 853 96 e-15 0.000 000 000 61 e-15 m

proton Compton wavelength over 2 pi 0.210 308 910 109 e-15 0.000 000 000 097 e-15 m

proton-electron mass ratio 1836.152 673 89 0.000 000 17 –

proton g factor 5.585 694 702 0.000 000 017 –

proton gyromagnetic ratio 2.675 221 900 e8 0.000 000 018 e8 s^-1 T^-1

proton gyromagnetic ratio over 2 pi 42.577 478 92 0.000 000 29 MHz T^-1

proton magnetic moment 1.410 606 7873 e-26 0.000 000 0097 e-26 J T^-1

proton mag. mom. to Bohr magneton ratio 1.521 032 2053 e-3 0.000 000 0046 e-3 –

proton mag. mom. to nuclear magneton ratio 2.792 847 3508 0.000 000 0085 –

proton magnetic shielding correction 25.691 e-6 0.011 e-6 –

proton mass 1.672 621 898 e-27 0.000 000 021 e-27 kg

proton mass energy equivalent 1.503 277 593 e-10 0.000 000 018 e-10 J

proton mass energy equivalent in MeV 938.272 0813 0.000 0058 MeV

proton mass in u 1.007 276 466 879 0.000 000 000 091 u

proton molar mass 1.007 276 466 879 e-3 0.000 000 000 091 e-3 kg mol^-1

proton-muon mass ratio 8.880 243 38 0.000 000 20 –

proton-neutron magnetic moment ratio -1.459 898 05 0.000 000 34 –

proton-neutron mass ratio 0.998 623 478 44 0.000 000 000 51 –

proton-tau mass ratio 0.528 063 0.000 048 –

quantum of circulation 3.636 947 5486 e-4 0.000 000 0017 e-4 m^2 s^-1

quantum of circulation times 2 7.273 895 0972 e-4 0.000 000 0033 e-4 m^2 s^-1

Rydberg constant 10 973 731.568 508 0.000 065 m^-1

Rydberg constant times c in Hz 3.289 841 960 355 e15 0.000 000 000 019 e15 Hz

Rydberg constant times hc in eV 13.605 693 009 0.000 000 084 eV

Rydberg constant times hc in J 2.179 872 325 e-18 0.000 000 027 e-18 J

shielded helion gyromagnetic ratio 2.037 894 585 e8 0.000 000 027 e8 s^-1 T^-1

shielded helion gyromagnetic ratio over 2 pi 32.434 099 66 0.000 000 43 MHz T^-1

shielded helion magnetic moment -1.074 553 080 e-26 0.000 000 014 e-26 J T^-1

shielded helion mag. mom. to Bohr ratio -1.158 671 471 e-3 0.000 000 014 e-3 –

shielded helion mag. mom. to nuclear ratio -2.127 497 720 0.000 000 025 –

shielded helion to proton mm ratio -0.761 766 5603 0.000 000 0092 –

shielded helion to shielded proton mm ratio -0.761 786 1313 0.000 000 0033 –

shielded proton gyromagnetic ratio 2.675 153 171 e8 0.000 000 033 e8 s^-1 T^-1

shielded proton gyromagnetic ratio over 2 pi 42.576 385 07 0.000 000 53 MHz T^-1

shielded proton magnetic moment 1.410 570 547 e-26 0.000 000 018 e-26 J T^-1

shielded proton mag. mom. to Bohr ratio 1.520 993 128 e-3 0.000 000 017 e-3 –

shielded proton mag. mom. to nuclear ratio 2.792 775 600 0.000 000 030 –

tau Compton wavelength 0.697 787 e-15 0.000 063 e-15 m

tau Compton wavelength over 2 pi 0.111 056 e-15 0.000 010 e-15 m

tau-electron mass ratio 3477.15 0.31 –

tau mass 3.167 47 e-27 0.000 29 e-27 kg

tau mass energy equivalent 2.846 78 e-10 0.000 26 e-10 J

tau mass energy equivalent in MeV 1776.82 0.16 MeV

tau mass in u 1.907 49 0.000 17 u

tau molar mass 1.907 49 e-3 0.000 17 e-3 kg mol^-1

tau-muon mass ratio 16.8167 0.0015 –

tau-neutron mass ratio 1.891 11 0.000 17 –

tau-proton mass ratio 1.893 72 0.000 17 –

Thomson cross section 0.665 245 871 58 e-28 0.000 000 000 91 e-28 m^2

triton-electron mass ratio 5496.921 535 88 0.000 000 26 –

triton g factor 5.957 924 920 0.000 000 028 –

triton magnetic moment 1.504 609 503 e-26 0.000 000 012 e-26 J T^-1

triton mag. mom. to Bohr magneton ratio 1.622 393 6616 e-3 0.000 000 0076 e-3 –

triton mag. mom. to nuclear magneton ratio 2.978 962 460 0.000 000 014 –

triton mass 5.007 356 665 e-27 0.000 000 062 e-27 kg

triton mass energy equivalent 4.500 387 735 e-10 0.000 000 055 e-10 J

triton mass energy equivalent in MeV 2808.921 112 0.000 017 MeV

triton mass in u 3.015 500 716 32 0.000 000 000 11 u

triton molar mass 3.015 500 716 32 e-3 0.000 000 000 11 e-3 kg mol^-1

triton-proton mass ratio 2.993 717 033 48 0.000 000 000 22 –

weak mixing angle 0.2223 0.0021 –

CONSTANT VALUE UNCERTAINTY UNIT

alpha particle mass 6.644 657 230 e-27 0.000 000 082 e-27 kg

alpha particle mass energy equivalent 5.971 920 097 e-10 0.000 000 073 e-10 J

alpha particle mass energy equivalent in MeV 3727.379 378 0.000 023 MeV

alpha particle mass in u 4.001 506 179 127 0.000 000 000 063 u

alpha particle molar mass 4.001 506 179 127 e-3 0.000 000 000 063 e-3 kg mol^-1

alpha particle-electron mass ratio 7294.299 541 36 0.000 000 24 –

alpha particle-proton mass ratio 3.972 599 689 07 0.000 000 000 36 –

Bohr radius 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

classical electron radius 2.817 940 3227 e-15 0.000 000 0019 e-15 m

Compton wavelength 2.426 310 2367 e-12 0.000 000 0011 e-12 m

Compton wavelength over 2 pi 386.159 267 64 e-15 0.000 000 18 e-15 m

deuteron g factor 0.857 438 2311 0.000 000 0048 –

deuteron magnetic moment 0.433 073 5040 e-26 0.000 000 0036 e-26 J T^-1

deuteron mag. mom. to Bohr magneton ratio 0.466 975 4554 e-3 0.000 000 0026 e-3 –

deuteron mag. mom. to nuclear magneton ratio 0.857 438 2311 0.000 000 0048 –

deuteron mass 3.343 583 719 e-27 0.000 000 041 e-27 kg

deuteron mass energy equivalent 3.005 063 183 e-10 0.000 000 037 e-10 J

deuteron mass energy equivalent in MeV 1875.612 928 0.000 012 MeV

deuteron mass in u 2.013 553 212 745 0.000 000 000 040 u

deuteron molar mass 2.013 553 212 745 e-3 0.000 000 000 040 e-3 kg mol^-1

deuteron-neutron magnetic moment ratio -0.448 206 52 0.000 000 11 –

deuteron-proton magnetic moment ratio 0.307 012 2077 0.000 000 0015 –

deuteron-proton mass ratio 1.999 007 500 87 0.000 000 000 19 –

deuteron RMS charge radius 2.1413 e-15 0.0025 e-15 m

electron charge to mass quotient -1.758 820 024 e11 0.000 000 011 e11 C kg^-1

electron-deuteron magnetic moment ratio -2143.923 499 0.000 012 –

electron-deuteron mass ratio 2.724 437 107 484 e-4 0.000 000 000 096 e-4 –

electron g factor -2.002 319 304 361 82 0.000 000 000 000 52 –

electron gyromagnetic ratio 1.760 859 644 e11 0.000 000 011 e11 s^-1 T^-1

electron gyromagnetic ratio over 2 pi 28 024.951 64 0.000 17 MHz T^-1

electron-helion mass ratio 1.819 543 074 854 e-4 0.000 000 000 088 e-4 –

electron magnetic moment -928.476 4620 e-26 0.000 0057 e-26 J T^-1

electron magnetic moment anomaly 1.159 652 180 91 e-3 0.000 000 000 26 e-3 –

electron mag. mom. to Bohr magneton ratio -1.001 159 652 180 91 0.000 000 000 000 26 –

electron mag. mom. to nuclear magneton ratio -1838.281 972 34 0.000 000 17 –

electron mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

electron mass energy equivalent 8.187 105 65 e-14 0.000 000 10 e-14 J

electron mass energy equivalent in MeV 0.510 998 9461 0.000 000 0031 MeV

electron mass in u 5.485 799 090 70 e-4 0.000 000 000 16 e-4 u

electron molar mass 5.485 799 090 70 e-7 0.000 000 000 16 e-7 kg mol^-1

electron-muon magnetic moment ratio 206.766 9880 0.000 0046 –

electron-muon mass ratio 4.836 331 70 e-3 0.000 000 11 e-3 –

electron-neutron magnetic moment ratio 960.920 50 0.000 23 –

electron-neutron mass ratio 5.438 673 4428 e-4 0.000 000 0027 e-4 –

electron-proton magnetic moment ratio -658.210 6866 0.000 0020 –

electron-proton mass ratio 5.446 170 213 52 e-4 0.000 000 000 52 e-4 –

electron-tau mass ratio 2.875 92 e-4 0.000 26 e-4 –

electron to alpha particle mass ratio 1.370 933 554 798 e-4 0.000 000 000 045 e-4 –

electron to shielded helion mag. mom. ratio 864.058 257 0.000 010 –

electron to shielded proton mag. mom. ratio -658.227 5971 0.000 0072 –

electron-triton mass ratio 1.819 200 062 203 e-4 0.000 000 000 084 e-4 –

Fermi coupling constant 1.166 3787 e-5 0.000 0006 e-5 GeV^-2

fine-structure constant 7.297 352 5664 e-3 0.000 000 0017 e-3 –

Hartree energy 4.359 744 650 e-18 0.000 000 054 e-18 J

Hartree energy in eV 27.211 386 02 0.000 000 17 eV

helion-electron mass ratio 5495.885 279 22 0.000 000 27 –

helion g factor -4.255 250 616 0.000 000 050 –

helion magnetic moment -1.074 617 522 e-26 0.000 000 014 e-26 J T^-1

helion mag. mom. to Bohr magneton ratio -1.158 740 958 e-3 0.000 000 014 e-3 –

helion mag. mom. to nuclear magneton ratio -2.127 625 308 0.000 000 025 –

helion mass 5.006 412 700 e-27 0.000 000 062 e-27 kg

helion mass energy equivalent 4.499 539 341 e-10 0.000 000 055 e-10 J

helion mass energy equivalent in MeV 2808.391 586 0.000 017 MeV

helion mass in u 3.014 932 246 73 0.000 000 000 12 u

helion molar mass 3.014 932 246 73 e-3 0.000 000 000 12 e-3 kg mol^-1

helion-proton mass ratio 2.993 152 670 46 0.000 000 000 29 –

inverse fine-structure constant 137.035 999 139 0.000 000 031 –

muon Compton wavelength 11.734 441 11 e-15 0.000 000 26 e-15 m

muon Compton wavelength over 2 pi 1.867 594 308 e-15 0.000 000 042 e-15 m

muon-electron mass ratio 206.768 2826 0.000 0046 –

muon g factor -2.002 331 8418 0.000 000 0013 –

muon magnetic moment -4.490 448 26 e-26 0.000 000 10 e-26 J T^-1

muon magnetic moment anomaly 1.165 920 89 e-3 0.000 000 63 e-3 –

muon mag. mom. to Bohr magneton ratio -4.841 970 48 e-3 0.000 000 11 e-3 –

muon mag. mom. to nuclear magneton ratio -8.890 597 05 0.000 000 20 –

muon mass 1.883 531 594 e-28 0.000 000 048 e-28 kg

muon mass energy equivalent 1.692 833 774 e-11 0.000 000 043 e-11 J

muon mass energy equivalent in MeV 105.658 3745 0.000 0024 MeV

muon mass in u 0.113 428 9257 0.000 000 0025 u

muon molar mass 0.113 428 9257 e-3 0.000 000 0025 e-3 kg mol^-1

muon-neutron mass ratio 0.112 454 5167 0.000 000 0025 –

muon-proton magnetic moment ratio -3.183 345 142 0.000 000 071 –

muon-proton mass ratio 0.112 609 5262 0.000 000 0025 –

muon-tau mass ratio 5.946 49 e-2 0.000 54 e-2 –

neutron Compton wavelength 1.319 590 904 81 e-15 0.000 000 000 88 e-15 m

neutron Compton wavelength over 2 pi 0.210 019 415 36 e-15 0.000 000 000 14 e-15 m

neutron-electron magnetic moment ratio 1.040 668 82 e-3 0.000 000 25 e-3 –

neutron-electron mass ratio 1838.683 661 58 0.000 000 90 –

neutron g factor -3.826 085 45 0.000 000 90 –

neutron gyromagnetic ratio 1.832 471 72 e8 0.000 000 43 e8 s^-1 T^-1

neutron gyromagnetic ratio over 2 pi 29.164 6933 0.000 0069 MHz T^-1

neutron magnetic moment -0.966 236 50 e-26 0.000 000 23 e-26 J T^-1

neutron mag. mom. to Bohr magneton ratio -1.041 875 63 e-3 0.000 000 25 e-3 –

neutron mag. mom. to nuclear magneton ratio -1.913 042 73 0.000 000 45 –

neutron mass 1.674 927 471 e-27 0.000 000 021 e-27 kg

neutron mass energy equivalent 1.505 349 739 e-10 0.000 000 019 e-10 J

neutron mass energy equivalent in MeV 939.565 4133 0.000 0058 MeV

neutron mass in u 1.008 664 915 88 0.000 000 000 49 u

neutron molar mass 1.008 664 915 88 e-3 0.000 000 000 49 e-3 kg mol^-1

neutron-muon mass ratio 8.892 484 08 0.000 000 20 –

neutron-proton magnetic moment ratio -0.684 979 34 0.000 000 16 –

neutron-proton mass difference 2.305 573 77 e-30 0.000 000 85 e-30 –

neutron-proton mass diff. energy equiv. 2.072 146 37 e-13 0.000 000 76 e-13 –

neutron-proton mass diff. energy equiv. in MeV 1.293 332 05 0.000 000 48 –

neutron-proton mass difference in u 0.001 388 449 00 0.000 000 000 51 –

neutron-proton mass ratio 1.001 378 418 98 0.000 000 000 51 –

neutron-tau mass ratio 0.528 790 0.000 048 –

neutron to shielded proton mag. mom. ratio -0.684 996 94 0.000 000 16 –

proton charge to mass quotient 9.578 833 226 e7 0.000 000 059 e7 C kg^-1

proton Compton wavelength 1.321 409 853 96 e-15 0.000 000 000 61 e-15 m

proton Compton wavelength over 2 pi 0.210 308 910 109 e-15 0.000 000 000 097 e-15 m

proton-electron mass ratio 1836.152 673 89 0.000 000 17 –

proton g factor 5.585 694 702 0.000 000 017 –

proton gyromagnetic ratio 2.675 221 900 e8 0.000 000 018 e8 s^-1 T^-1

proton gyromagnetic ratio over 2 pi 42.577 478 92 0.000 000 29 MHz T^-1

proton magnetic moment 1.410 606 7873 e-26 0.000 000 0097 e-26 J T^-1

proton mag. mom. to Bohr magneton ratio 1.521 032 2053 e-3 0.000 000 0046 e-3 –

proton mag. mom. to nuclear magneton ratio 2.792 847 3508 0.000 000 0085 –

proton magnetic shielding correction 25.691 e-6 0.011 e-6 –

proton mass 1.672 621 898 e-27 0.000 000 021 e-27 kg

proton mass energy equivalent 1.503 277 593 e-10 0.000 000 018 e-10 J

proton mass energy equivalent in MeV 938.272 0813 0.000 0058 MeV

proton mass in u 1.007 276 466 879 0.000 000 000 091 u

proton molar mass 1.007 276 466 879 e-3 0.000 000 000 091 e-3 kg mol^-1

proton-muon mass ratio 8.880 243 38 0.000 000 20 –

proton-neutron magnetic moment ratio -1.459 898 05 0.000 000 34 –

proton-neutron mass ratio 0.998 623 478 44 0.000 000 000 51 –

proton-tau mass ratio 0.528 063 0.000 048 –

quantum of circulation 3.636 947 5486 e-4 0.000 000 0017 e-4 m^2 s^-1

quantum of circulation times 2 7.273 895 0972 e-4 0.000 000 0033 e-4 m^2 s^-1

Rydberg constant 10 973 731.568 508 0.000 065 m^-1

Rydberg constant times c in Hz 3.289 841 960 355 e15 0.000 000 000 019 e15 Hz

Rydberg constant times hc in eV 13.605 693 009 0.000 000 084 eV

Rydberg constant times hc in J 2.179 872 325 e-18 0.000 000 027 e-18 J

shielded helion gyromagnetic ratio 2.037 894 585 e8 0.000 000 027 e8 s^-1 T^-1

shielded helion gyromagnetic ratio over 2 pi 32.434 099 66 0.000 000 43 MHz T^-1

shielded helion magnetic moment -1.074 553 080 e-26 0.000 000 014 e-26 J T^-1

shielded helion mag. mom. to Bohr ratio -1.158 671 471 e-3 0.000 000 014 e-3 –

shielded helion mag. mom. to nuclear ratio -2.127 497 720 0.000 000 025 –

shielded helion to proton mm ratio -0.761 766 5603 0.000 000 0092 –

shielded helion to shielded proton mm ratio -0.761 786 1313 0.000 000 0033 –

shielded proton gyromagnetic ratio 2.675 153 171 e8 0.000 000 033 e8 s^-1 T^-1

shielded proton gyromagnetic ratio over 2 pi 42.576 385 07 0.000 000 53 MHz T^-1

shielded proton magnetic moment 1.410 570 547 e-26 0.000 000 018 e-26 J T^-1

shielded proton mag. mom. to Bohr ratio 1.520 993 128 e-3 0.000 000 017 e-3 –

shielded proton mag. mom. to nuclear ratio 2.792 775 600 0.000 000 030 –

tau Compton wavelength 0.697 787 e-15 0.000 063 e-15 m

tau Compton wavelength over 2 pi 0.111 056 e-15 0.000 010 e-15 m

tau-electron mass ratio 3477.15 0.31 –

tau mass 3.167 47 e-27 0.000 29 e-27 kg

tau mass energy equivalent 2.846 78 e-10 0.000 26 e-10 J

tau mass energy equivalent in MeV 1776.82 0.16 MeV

tau mass in u 1.907 49 0.000 17 u

tau molar mass 1.907 49 e-3 0.000 17 e-3 kg mol^-1

tau-muon mass ratio 16.8167 0.0015 –

tau-neutron mass ratio 1.891 11 0.000 17 –

tau-proton mass ratio 1.893 72 0.000 17 –

Thomson cross section 0.665 245 871 58 e-28 0.000 000 000 91 e-28 m^2

triton-electron mass ratio 5496.921 535 88 0.000 000 26 –

triton g factor 5.957 924 920 0.000 000 028 –

triton magnetic moment 1.504 609 503 e-26 0.000 000 012 e-26 J T^-1

triton mag. mom. to Bohr magneton ratio 1.622 393 6616 e-3 0.000 000 0076 e-3 –

triton mag. mom. to nuclear magneton ratio 2.978 962 460 0.000 000 014 –

triton mass 5.007 356 665 e-27 0.000 000 062 e-27 kg

triton mass energy equivalent 4.500 387 735 e-10 0.000 000 055 e-10 J

triton mass energy equivalent in MeV 2808.921 112 0.000 017 MeV

triton mass in u 3.015 500 716 32 0.000 000 000 11 u

triton molar mass 3.015 500 716 32 e-3 0.000 000 000 11 e-3 kg mol^-1

triton-proton mass ratio 2.993 717 033 48 0.000 000 000 22 –

weak mixing angle 0.2223 0.0021 –

CONSTANT VALUE UNCERTAINTY UNIT

alpha particle mass 6.644 657 230 e-27 0.000 000 082 e-27 kg

alpha particle mass energy equivalent 5.971 920 097 e-10 0.000 000 073 e-10 J

alpha particle mass energy equivalent in MeV 3727.379 378 0.000 023 MeV

alpha particle mass in u 4.001 506 179 127 0.000 000 000 063 u

alpha particle molar mass 4.001 506 179 127 e-3 0.000 000 000 063 e-3 kg mol^-1

alpha particle-electron mass ratio 7294.299 541 36 0.000 000 24 –

alpha particle-proton mass ratio 3.972 599 689 07 0.000 000 000 36 –

Bohr radius 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

classical electron radius 2.817 940 3227 e-15 0.000 000 0019 e-15 m

Compton wavelength 2.426 310 2367 e-12 0.000 000 0011 e-12 m

Compton wavelength over 2 pi 386.159 267 64 e-15 0.000 000 18 e-15 m

deuteron g factor 0.857 438 2311 0.000 000 0048 –

deuteron magnetic moment 0.433 073 5040 e-26 0.000 000 0036 e-26 J T^-1

deuteron mag. mom. to Bohr magneton ratio 0.466 975 4554 e-3 0.000 000 0026 e-3 –

deuteron mag. mom. to nuclear magneton ratio 0.857 438 2311 0.000 000 0048 –

deuteron mass 3.343 583 719 e-27 0.000 000 041 e-27 kg

deuteron mass energy equivalent 3.005 063 183 e-10 0.000 000 037 e-10 J

deuteron mass energy equivalent in MeV 1875.612 928 0.000 012 MeV

deuteron mass in u 2.013 553 212 745 0.000 000 000 040 u

deuteron molar mass 2.013 553 212 745 e-3 0.000 000 000 040 e-3 kg mol^-1

deuteron-neutron magnetic moment ratio -0.448 206 52 0.000 000 11 –

deuteron-proton magnetic moment ratio 0.307 012 2077 0.000 000 0015 –

deuteron-proton mass ratio 1.999 007 500 87 0.000 000 000 19 –

deuteron RMS charge radius 2.1413 e-15 0.0025 e-15 m

electron charge to mass quotient -1.758 820 024 e11 0.000 000 011 e11 C kg^-1

electron-deuteron magnetic moment ratio -2143.923 499 0.000 012 –

electron-deuteron mass ratio 2.724 437 107 484 e-4 0.000 000 000 096 e-4 –

electron g factor -2.002 319 304 361 82 0.000 000 000 000 52 –

electron gyromagnetic ratio 1.760 859 644 e11 0.000 000 011 e11 s^-1 T^-1

electron gyromagnetic ratio over 2 pi 28 024.951 64 0.000 17 MHz T^-1

electron-helion mass ratio 1.819 543 074 854 e-4 0.000 000 000 088 e-4 –

electron magnetic moment -928.476 4620 e-26 0.000 0057 e-26 J T^-1

electron magnetic moment anomaly 1.159 652 180 91 e-3 0.000 000 000 26 e-3 –

electron mag. mom. to Bohr magneton ratio -1.001 159 652 180 91 0.000 000 000 000 26 –

electron mag. mom. to nuclear magneton ratio -1838.281 972 34 0.000 000 17 –

electron mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

electron mass energy equivalent 8.187 105 65 e-14 0.000 000 10 e-14 J

electron mass energy equivalent in MeV 0.510 998 9461 0.000 000 0031 MeV

electron mass in u 5.485 799 090 70 e-4 0.000 000 000 16 e-4 u

electron molar mass 5.485 799 090 70 e-7 0.000 000 000 16 e-7 kg mol^-1

electron-muon magnetic moment ratio 206.766 9880 0.000 0046 –

electron-muon mass ratio 4.836 331 70 e-3 0.000 000 11 e-3 –

electron-neutron magnetic moment ratio 960.920 50 0.000 23 –

electron-neutron mass ratio 5.438 673 4428 e-4 0.000 000 0027 e-4 –

electron-proton magnetic moment ratio -658.210 6866 0.000 0020 –

electron-proton mass ratio 5.446 170 213 52 e-4 0.000 000 000 52 e-4 –

electron-tau mass ratio 2.875 92 e-4 0.000 26 e-4 –

electron to alpha particle mass ratio 1.370 933 554 798 e-4 0.000 000 000 045 e-4 –

electron to shielded helion mag. mom. ratio 864.058 257 0.000 010 –

electron to shielded proton mag. mom. ratio -658.227 5971 0.000 0072 –

electron-triton mass ratio 1.819 200 062 203 e-4 0.000 000 000 084 e-4 –

Fermi coupling constant 1.166 3787 e-5 0.000 0006 e-5 GeV^-2

fine-structure constant 7.297 352 5664 e-3 0.000 000 0017 e-3 –

Hartree energy 4.359 744 650 e-18 0.000 000 054 e-18 J

Hartree energy in eV 27.211 386 02 0.000 000 17 eV

helion-electron mass ratio 5495.885 279 22 0.000 000 27 –

helion g factor -4.255 250 616 0.000 000 050 –

helion magnetic moment -1.074 617 522 e-26 0.000 000 014 e-26 J T^-1

helion mag. mom. to Bohr magneton ratio -1.158 740 958 e-3 0.000 000 014 e-3 –

helion mag. mom. to nuclear magneton ratio -2.127 625 308 0.000 000 025 –

helion mass 5.006 412 700 e-27 0.000 000 062 e-27 kg

helion mass energy equivalent 4.499 539 341 e-10 0.000 000 055 e-10 J

helion mass energy equivalent in MeV 2808.391 586 0.000 017 MeV

helion mass in u 3.014 932 246 73 0.000 000 000 12 u

helion molar mass 3.014 932 246 73 e-3 0.000 000 000 12 e-3 kg mol^-1

helion-proton mass ratio 2.993 152 670 46 0.000 000 000 29 –

inverse fine-structure constant 137.035 999 139 0.000 000 031 –

muon Compton wavelength 11.734 441 11 e-15 0.000 000 26 e-15 m

muon Compton wavelength over 2 pi 1.867 594 308 e-15 0.000 000 042 e-15 m

muon-electron mass ratio 206.768 2826 0.000 0046 –

muon g factor -2.002 331 8418 0.000 000 0013 –

muon magnetic moment -4.490 448 26 e-26 0.000 000 10 e-26 J T^-1

muon magnetic moment anomaly 1.165 920 89 e-3 0.000 000 63 e-3 –

muon mag. mom. to Bohr magneton ratio -4.841 970 48 e-3 0.000 000 11 e-3 –

muon mag. mom. to nuclear magneton ratio -8.890 597 05 0.000 000 20 –

muon mass 1.883 531 594 e-28 0.000 000 048 e-28 kg

muon mass energy equivalent 1.692 833 774 e-11 0.000 000 043 e-11 J

muon mass energy equivalent in MeV 105.658 3745 0.000 0024 MeV

muon mass in u 0.113 428 9257 0.000 000 0025 u

muon molar mass 0.113 428 9257 e-3 0.000 000 0025 e-3 kg mol^-1

muon-neutron mass ratio 0.112 454 5167 0.000 000 0025 –

muon-proton magnetic moment ratio -3.183 345 142 0.000 000 071 –

muon-proton mass ratio 0.112 609 5262 0.000 000 0025 –

muon-tau mass ratio 5.946 49 e-2 0.000 54 e-2 –

neutron Compton wavelength 1.319 590 904 81 e-15 0.000 000 000 88 e-15 m

neutron Compton wavelength over 2 pi 0.210 019 415 36 e-15 0.000 000 000 14 e-15 m

neutron-electron magnetic moment ratio 1.040 668 82 e-3 0.000 000 25 e-3 –

neutron-electron mass ratio 1838.683 661 58 0.000 000 90 –

neutron g factor -3.826 085 45 0.000 000 90 –

neutron gyromagnetic ratio 1.832 471 72 e8 0.000 000 43 e8 s^-1 T^-1

neutron gyromagnetic ratio over 2 pi 29.164 6933 0.000 0069 MHz T^-1

neutron magnetic moment -0.966 236 50 e-26 0.000 000 23 e-26 J T^-1

neutron mag. mom. to Bohr magneton ratio -1.041 875 63 e-3 0.000 000 25 e-3 –

neutron mag. mom. to nuclear magneton ratio -1.913 042 73 0.000 000 45 –

neutron mass 1.674 927 471 e-27 0.000 000 021 e-27 kg

neutron mass energy equivalent 1.505 349 739 e-10 0.000 000 019 e-10 J

neutron mass energy equivalent in MeV 939.565 4133 0.000 0058 MeV

neutron mass in u 1.008 664 915 88 0.000 000 000 49 u

neutron molar mass 1.008 664 915 88 e-3 0.000 000 000 49 e-3 kg mol^-1

neutron-muon mass ratio 8.892 484 08 0.000 000 20 –

neutron-proton magnetic moment ratio -0.684 979 34 0.000 000 16 –

neutron-proton mass difference 2.305 573 77 e-30 0.000 000 85 e-30 –

neutron-proton mass diff. energy equiv. 2.072 146 37 e-13 0.000 000 76 e-13 –

neutron-proton mass diff. energy equiv. in MeV 1.293 332 05 0.000 000 48 –

neutron-proton mass difference in u 0.001 388 449 00 0.000 000 000 51 –

neutron-proton mass ratio 1.001 378 418 98 0.000 000 000 51 –

neutron-tau mass ratio 0.528 790 0.000 048 –

neutron to shielded proton mag. mom. ratio -0.684 996 94 0.000 000 16 –

proton charge to mass quotient 9.578 833 226 e7 0.000 000 059 e7 C kg^-1

proton Compton wavelength 1.321 409 853 96 e-15 0.000 000 000 61 e-15 m

proton Compton wavelength over 2 pi 0.210 308 910 109 e-15 0.000 000 000 097 e-15 m

proton-electron mass ratio 1836.152 673 89 0.000 000 17 –

proton g factor 5.585 694 702 0.000 000 017 –

proton gyromagnetic ratio 2.675 221 900 e8 0.000 000 018 e8 s^-1 T^-1

proton gyromagnetic ratio over 2 pi 42.577 478 92 0.000 000 29 MHz T^-1

proton magnetic moment 1.410 606 7873 e-26 0.000 000 0097 e-26 J T^-1

proton mag. mom. to Bohr magneton ratio 1.521 032 2053 e-3 0.000 000 0046 e-3 –

proton mag. mom. to nuclear magneton ratio 2.792 847 3508 0.000 000 0085 –

proton magnetic shielding correction 25.691 e-6 0.011 e-6 –

proton mass 1.672 621 898 e-27 0.000 000 021 e-27 kg

proton mass energy equivalent 1.503 277 593 e-10 0.000 000 018 e-10 J

proton mass energy equivalent in MeV 938.272 0813 0.000 0058 MeV

proton mass in u 1.007 276 466 879 0.000 000 000 091 u

proton molar mass 1.007 276 466 879 e-3 0.000 000 000 091 e-3 kg mol^-1

proton-muon mass ratio 8.880 243 38 0.000 000 20 –

proton-neutron magnetic moment ratio -1.459 898 05 0.000 000 34 –

proton-neutron mass ratio 0.998 623 478 44 0.000 000 000 51 –

proton-tau mass ratio 0.528 063 0.000 048 –

quantum of circulation 3.636 947 5486 e-4 0.000 000 0017 e-4 m^2 s^-1

quantum of circulation times 2 7.273 895 0972 e-4 0.000 000 0033 e-4 m^2 s^-1

Rydberg constant 10 973 731.568 508 0.000 065 m^-1

Rydberg constant times c in Hz 3.289 841 960 355 e15 0.000 000 000 019 e15 Hz

Rydberg constant times hc in eV 13.605 693 009 0.000 000 084 eV

Rydberg constant times hc in J 2.179 872 325 e-18 0.000 000 027 e-18 J

shielded helion gyromagnetic ratio 2.037 894 585 e8 0.000 000 027 e8 s^-1 T^-1

shielded helion gyromagnetic ratio over 2 pi 32.434 099 66 0.000 000 43 MHz T^-1

shielded helion magnetic moment -1.074 553 080 e-26 0.000 000 014 e-26 J T^-1

shielded helion mag. mom. to Bohr ratio -1.158 671 471 e-3 0.000 000 014 e-3 –

shielded helion mag. mom. to nuclear ratio -2.127 497 720 0.000 000 025 –

shielded helion to proton mm ratio -0.761 766 5603 0.000 000 0092 –

shielded helion to shielded proton mm ratio -0.761 786 1313 0.000 000 0033 –

shielded proton gyromagnetic ratio 2.675 153 171 e8 0.000 000 033 e8 s^-1 T^-1

shielded proton gyromagnetic ratio over 2 pi 42.576 385 07 0.000 000 53 MHz T^-1

shielded proton magnetic moment 1.410 570 547 e-26 0.000 000 018 e-26 J T^-1

shielded proton mag. mom. to Bohr ratio 1.520 993 128 e-3 0.000 000 017 e-3 –

shielded proton mag. mom. to nuclear ratio 2.792 775 600 0.000 000 030 –

tau Compton wavelength 0.697 787 e-15 0.000 063 e-15 m

tau Compton wavelength over 2 pi 0.111 056 e-15 0.000 010 e-15 m

tau-electron mass ratio 3477.15 0.31 –

tau mass 3.167 47 e-27 0.000 29 e-27 kg

tau mass energy equivalent 2.846 78 e-10 0.000 26 e-10 J

tau mass energy equivalent in MeV 1776.82 0.16 MeV

tau mass in u 1.907 49 0.000 17 u

tau molar mass 1.907 49 e-3 0.000 17 e-3 kg mol^-1

tau-muon mass ratio 16.8167 0.0015 –

tau-neutron mass ratio 1.891 11 0.000 17 –

tau-proton mass ratio 1.893 72 0.000 17 –

Thomson cross section 0.665 245 871 58 e-28 0.000 000 000 91 e-28 m^2

triton-electron mass ratio 5496.921 535 88 0.000 000 26 –

triton g factor 5.957 924 920 0.000 000 028 –

triton magnetic moment 1.504 609 503 e-26 0.000 000 012 e-26 J T^-1

triton mag. mom. to Bohr magneton ratio 1.622 393 6616 e-3 0.000 000 0076 e-3 –

triton mag. mom. to nuclear magneton ratio 2.978 962 460 0.000 000 014 –

triton mass 5.007 356 665 e-27 0.000 000 062 e-27 kg

triton mass energy equivalent 4.500 387 735 e-10 0.000 000 055 e-10 J

triton mass energy equivalent in MeV 2808.921 112 0.000 017 MeV

triton mass in u 3.015 500 716 32 0.000 000 000 11 u

triton molar mass 3.015 500 716 32 e-3 0.000 000 000 11 e-3 kg mol^-1

triton-proton mass ratio 2.993 717 033 48 0.000 000 000 22 –

weak mixing angle 0.2223 0.0021 –

CONSTANT VALUE UNCERTAINTY UNIT

alpha particle mass 6.644 657 230 e-27 0.000 000 082 e-27 kg

alpha particle mass energy equivalent 5.971 920 097 e-10 0.000 000 073 e-10 J

alpha particle mass energy equivalent in MeV 3727.379 378 0.000 023 MeV

alpha particle mass in u 4.001 506 179 127 0.000 000 000 063 u

alpha particle molar mass 4.001 506 179 127 e-3 0.000 000 000 063 e-3 kg mol^-1

alpha particle-electron mass ratio 7294.299 541 36 0.000 000 24 –

alpha particle-proton mass ratio 3.972 599 689 07 0.000 000 000 36 –

Bohr radius 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

classical electron radius 2.817 940 3227 e-15 0.000 000 0019 e-15 m

Compton wavelength 2.426 310 2367 e-12 0.000 000 0011 e-12 m

Compton wavelength over 2 pi 386.159 267 64 e-15 0.000 000 18 e-15 m

deuteron g factor 0.857 438 2311 0.000 000 0048 –

deuteron magnetic moment 0.433 073 5040 e-26 0.000 000 0036 e-26 J T^-1

deuteron mag. mom. to Bohr magneton ratio 0.466 975 4554 e-3 0.000 000 0026 e-3 –

deuteron mag. mom. to nuclear magneton ratio 0.857 438 2311 0.000 000 0048 –

deuteron mass 3.343 583 719 e-27 0.000 000 041 e-27 kg

deuteron mass energy equivalent 3.005 063 183 e-10 0.000 000 037 e-10 J

deuteron mass energy equivalent in MeV 1875.612 928 0.000 012 MeV

deuteron mass in u 2.013 553 212 745 0.000 000 000 040 u

deuteron molar mass 2.013 553 212 745 e-3 0.000 000 000 040 e-3 kg mol^-1

deuteron-neutron magnetic moment ratio -0.448 206 52 0.000 000 11 –

deuteron-proton magnetic moment ratio 0.307 012 2077 0.000 000 0015 –

deuteron-proton mass ratio 1.999 007 500 87 0.000 000 000 19 –

deuteron RMS charge radius 2.1413 e-15 0.0025 e-15 m

electron charge to mass quotient -1.758 820 024 e11 0.000 000 011 e11 C kg^-1

electron-deuteron magnetic moment ratio -2143.923 499 0.000 012 –

electron-deuteron mass ratio 2.724 437 107 484 e-4 0.000 000 000 096 e-4 –

electron g factor -2.002 319 304 361 82 0.000 000 000 000 52 –

electron gyromagnetic ratio 1.760 859 644 e11 0.000 000 011 e11 s^-1 T^-1

electron gyromagnetic ratio over 2 pi 28 024.951 64 0.000 17 MHz T^-1

electron-helion mass ratio 1.819 543 074 854 e-4 0.000 000 000 088 e-4 –

electron magnetic moment -928.476 4620 e-26 0.000 0057 e-26 J T^-1

electron magnetic moment anomaly 1.159 652 180 91 e-3 0.000 000 000 26 e-3 –

electron mag. mom. to Bohr magneton ratio -1.001 159 652 180 91 0.000 000 000 000 26 –

electron mag. mom. to nuclear magneton ratio -1838.281 972 34 0.000 000 17 –

electron mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

electron mass energy equivalent 8.187 105 65 e-14 0.000 000 10 e-14 J

electron mass energy equivalent in MeV 0.510 998 9461 0.000 000 0031 MeV

electron mass in u 5.485 799 090 70 e-4 0.000 000 000 16 e-4 u

electron molar mass 5.485 799 090 70 e-7 0.000 000 000 16 e-7 kg mol^-1

electron-muon magnetic moment ratio 206.766 9880 0.000 0046 –

electron-muon mass ratio 4.836 331 70 e-3 0.000 000 11 e-3 –

electron-neutron magnetic moment ratio 960.920 50 0.000 23 –

electron-neutron mass ratio 5.438 673 4428 e-4 0.000 000 0027 e-4 –

electron-proton magnetic moment ratio -658.210 6866 0.000 0020 –

electron-proton mass ratio 5.446 170 213 52 e-4 0.000 000 000 52 e-4 –

electron-tau mass ratio 2.875 92 e-4 0.000 26 e-4 –

electron to alpha particle mass ratio 1.370 933 554 798 e-4 0.000 000 000 045 e-4 –

electron to shielded helion mag. mom. ratio 864.058 257 0.000 010 –

electron to shielded proton mag. mom. ratio -658.227 5971 0.000 0072 –

electron-triton mass ratio 1.819 200 062 203 e-4 0.000 000 000 084 e-4 –

Fermi coupling constant 1.166 3787 e-5 0.000 0006 e-5 GeV^-2

fine-structure constant 7.297 352 5664 e-3 0.000 000 0017 e-3 –

Hartree energy 4.359 744 650 e-18 0.000 000 054 e-18 J

Hartree energy in eV 27.211 386 02 0.000 000 17 eV

helion-electron mass ratio 5495.885 279 22 0.000 000 27 –

helion g factor -4.255 250 616 0.000 000 050 –

helion magnetic moment -1.074 617 522 e-26 0.000 000 014 e-26 J T^-1

helion mag. mom. to Bohr magneton ratio -1.158 740 958 e-3 0.000 000 014 e-3 –

helion mag. mom. to nuclear magneton ratio -2.127 625 308 0.000 000 025 –

helion mass 5.006 412 700 e-27 0.000 000 062 e-27 kg

helion mass energy equivalent 4.499 539 341 e-10 0.000 000 055 e-10 J

helion mass energy equivalent in MeV 2808.391 586 0.000 017 MeV

helion mass in u 3.014 932 246 73 0.000 000 000 12 u

helion molar mass 3.014 932 246 73 e-3 0.000 000 000 12 e-3 kg mol^-1

helion-proton mass ratio 2.993 152 670 46 0.000 000 000 29 –

inverse fine-structure constant 137.035 999 139 0.000 000 031 –

muon Compton wavelength 11.734 441 11 e-15 0.000 000 26 e-15 m

muon Compton wavelength over 2 pi 1.867 594 308 e-15 0.000 000 042 e-15 m

muon-electron mass ratio 206.768 2826 0.000 0046 –

muon g factor -2.002 331 8418 0.000 000 0013 –

muon magnetic moment -4.490 448 26 e-26 0.000 000 10 e-26 J T^-1

muon magnetic moment anomaly 1.165 920 89 e-3 0.000 000 63 e-3 –

muon mag. mom. to Bohr magneton ratio -4.841 970 48 e-3 0.000 000 11 e-3 –

muon mag. mom. to nuclear magneton ratio -8.890 597 05 0.000 000 20 –

muon mass 1.883 531 594 e-28 0.000 000 048 e-28 kg

muon mass energy equivalent 1.692 833 774 e-11 0.000 000 043 e-11 J

muon mass energy equivalent in MeV 105.658 3745 0.000 0024 MeV

muon mass in u 0.113 428 9257 0.000 000 0025 u

muon molar mass 0.113 428 9257 e-3 0.000 000 0025 e-3 kg mol^-1

muon-neutron mass ratio 0.112 454 5167 0.000 000 0025 –

muon-proton magnetic moment ratio -3.183 345 142 0.000 000 071 –

muon-proton mass ratio 0.112 609 5262 0.000 000 0025 –

muon-tau mass ratio 5.946 49 e-2 0.000 54 e-2 –

neutron Compton wavelength 1.319 590 904 81 e-15 0.000 000 000 88 e-15 m

neutron Compton wavelength over 2 pi 0.210 019 415 36 e-15 0.000 000 000 14 e-15 m

neutron-electron magnetic moment ratio 1.040 668 82 e-3 0.000 000 25 e-3 –

neutron-electron mass ratio 1838.683 661 58 0.000 000 90 –

neutron g factor -3.826 085 45 0.000 000 90 –

neutron gyromagnetic ratio 1.832 471 72 e8 0.000 000 43 e8 s^-1 T^-1

neutron gyromagnetic ratio over 2 pi 29.164 6933 0.000 0069 MHz T^-1

neutron magnetic moment -0.966 236 50 e-26 0.000 000 23 e-26 J T^-1

neutron mag. mom. to Bohr magneton ratio -1.041 875 63 e-3 0.000 000 25 e-3 –

neutron mag. mom. to nuclear magneton ratio -1.913 042 73 0.000 000 45 –

neutron mass 1.674 927 471 e-27 0.000 000 021 e-27 kg

neutron mass energy equivalent 1.505 349 739 e-10 0.000 000 019 e-10 J

neutron mass energy equivalent in MeV 939.565 4133 0.000 0058 MeV

neutron mass in u 1.008 664 915 88 0.000 000 000 49 u

neutron molar mass 1.008 664 915 88 e-3 0.000 000 000 49 e-3 kg mol^-1

neutron-muon mass ratio 8.892 484 08 0.000 000 20 –

neutron-proton magnetic moment ratio -0.684 979 34 0.000 000 16 –

neutron-proton mass difference 2.305 573 77 e-30 0.000 000 85 e-30 –

neutron-proton mass diff. energy equiv. 2.072 146 37 e-13 0.000 000 76 e-13 –

neutron-proton mass diff. energy equiv. in MeV 1.293 332 05 0.000 000 48 –

neutron-proton mass difference in u 0.001 388 449 00 0.000 000 000 51 –

neutron-proton mass ratio 1.001 378 418 98 0.000 000 000 51 –

neutron-tau mass ratio 0.528 790 0.000 048 –

neutron to shielded proton mag. mom. ratio -0.684 996 94 0.000 000 16 –

proton charge to mass quotient 9.578 833 226 e7 0.000 000 059 e7 C kg^-1

proton Compton wavelength 1.321 409 853 96 e-15 0.000 000 000 61 e-15 m

proton Compton wavelength over 2 pi 0.210 308 910 109 e-15 0.000 000 000 097 e-15 m

proton-electron mass ratio 1836.152 673 89 0.000 000 17 –

proton g factor 5.585 694 702 0.000 000 017 –

proton gyromagnetic ratio 2.675 221 900 e8 0.000 000 018 e8 s^-1 T^-1

proton gyromagnetic ratio over 2 pi 42.577 478 92 0.000 000 29 MHz T^-1

proton magnetic moment 1.410 606 7873 e-26 0.000 000 0097 e-26 J T^-1

proton mag. mom. to Bohr magneton ratio 1.521 032 2053 e-3 0.000 000 0046 e-3 –

proton mag. mom. to nuclear magneton ratio 2.792 847 3508 0.000 000 0085 –

proton magnetic shielding correction 25.691 e-6 0.011 e-6 –

proton mass 1.672 621 898 e-27 0.000 000 021 e-27 kg

proton mass energy equivalent 1.503 277 593 e-10 0.000 000 018 e-10 J

proton mass energy equivalent in MeV 938.272 0813 0.000 0058 MeV

proton mass in u 1.007 276 466 879 0.000 000 000 091 u

proton molar mass 1.007 276 466 879 e-3 0.000 000 000 091 e-3 kg mol^-1

proton-muon mass ratio 8.880 243 38 0.000 000 20 –

proton-neutron magnetic moment ratio -1.459 898 05 0.000 000 34 –

proton-neutron mass ratio 0.998 623 478 44 0.000 000 000 51 –

proton-tau mass ratio 0.528 063 0.000 048 –

quantum of circulation 3.636 947 5486 e-4 0.000 000 0017 e-4 m^2 s^-1

quantum of circulation times 2 7.273 895 0972 e-4 0.000 000 0033 e-4 m^2 s^-1

Rydberg constant 10 973 731.568 508 0.000 065 m^-1

Rydberg constant times c in Hz 3.289 841 960 355 e15 0.000 000 000 019 e15 Hz

Rydberg constant times hc in eV 13.605 693 009 0.000 000 084 eV

Rydberg constant times hc in J 2.179 872 325 e-18 0.000 000 027 e-18 J

shielded helion gyromagnetic ratio 2.037 894 585 e8 0.000 000 027 e8 s^-1 T^-1

shielded helion gyromagnetic ratio over 2 pi 32.434 099 66 0.000 000 43 MHz T^-1

shielded helion magnetic moment -1.074 553 080 e-26 0.000 000 014 e-26 J T^-1

shielded helion mag. mom. to Bohr ratio -1.158 671 471 e-3 0.000 000 014 e-3 –

shielded helion mag. mom. to nuclear ratio -2.127 497 720 0.000 000 025 –

shielded helion to proton mm ratio -0.761 766 5603 0.000 000 0092 –

shielded helion to shielded proton mm ratio -0.761 786 1313 0.000 000 0033 –

shielded proton gyromagnetic ratio 2.675 153 171 e8 0.000 000 033 e8 s^-1 T^-1

shielded proton gyromagnetic ratio over 2 pi 42.576 385 07 0.000 000 53 MHz T^-1

shielded proton magnetic moment 1.410 570 547 e-26 0.000 000 018 e-26 J T^-1

shielded proton mag. mom. to Bohr ratio 1.520 993 128 e-3 0.000 000 017 e-3 –

shielded proton mag. mom. to nuclear ratio 2.792 775 600 0.000 000 030 –

tau Compton wavelength 0.697 787 e-15 0.000 063 e-15 m

tau Compton wavelength over 2 pi 0.111 056 e-15 0.000 010 e-15 m

tau-electron mass ratio 3477.15 0.31 –

tau mass 3.167 47 e-27 0.000 29 e-27 kg

tau mass energy equivalent 2.846 78 e-10 0.000 26 e-10 J

tau mass energy equivalent in MeV 1776.82 0.16 MeV

tau mass in u 1.907 49 0.000 17 u

tau molar mass 1.907 49 e-3 0.000 17 e-3 kg mol^-1

tau-muon mass ratio 16.8167 0.0015 –

tau-neutron mass ratio 1.891 11 0.000 17 –

tau-proton mass ratio 1.893 72 0.000 17 –

Thomson cross section 0.665 245 871 58 e-28 0.000 000 000 91 e-28 m^2

triton-electron mass ratio 5496.921 535 88 0.000 000 26 –

triton g factor 5.957 924 920 0.000 000 028 –

triton magnetic moment 1.504 609 503 e-26 0.000 000 012 e-26 J T^-1

triton mag. mom. to Bohr magneton ratio 1.622 393 6616 e-3 0.000 000 0076 e-3 –

triton mag. mom. to nuclear magneton ratio 2.978 962 460 0.000 000 014 –

triton mass 5.007 356 665 e-27 0.000 000 062 e-27 kg

triton mass energy equivalent 4.500 387 735 e-10 0.000 000 055 e-10 J

triton mass energy equivalent in MeV 2808.921 112 0.000 017 MeV

triton mass in u 3.015 500 716 32 0.000 000 000 11 u

triton molar mass 3.015 500 716 32 e-3 0.000 000 000 11 e-3 kg mol^-1

triton-proton mass ratio 2.993 717 033 48 0.000 000 000 22 –

weak mixing angle 0.2223 0.0021 –

CONSTANT VALUE UNIT

alpha particle mass 6.644 657 230 e-27 kg

alpha particle mass energy equivalent 5.971 920 097 e-10 J

alpha particle mass energy equivalent in MeV 3727.379 378 MeV

alpha particle mass in u 4.001 506 179 127 u

alpha particle molar mass 4.001 506 179 127 e-3 kg mol^-1

alpha particle-electron mass ratio 7294.299 541 36 –

alpha particle-proton mass ratio 3.972 599 689 07 –

Bohr radius 0.529 177 210 67 e-10 m

classical electron radius 2.817 940 3227 e-15 m

Compton wavelength 2.426 310 2367 e-12 m

Compton wavelength over 2 pi 386.159 267 64 e-15 m

deuteron g factor 0.857 438 2311 –

deuteron magnetic moment 0.433 073 5040 e-26 J T^-1

deuteron mag. mom. to Bohr magneton ratio 0.466 975 4554 e-3 –

deuteron mag. mom. to nuclear magneton ratio 0.857 438 2311 –

deuteron mass 3.343 583 719 e-27 kg

deuteron mass energy equivalent 3.005 063 183 e-10 J

deuteron mass energy equivalent in MeV 1875.612 928 MeV

deuteron mass in u 2.013 553 212 745 u

deuteron molar mass 2.013 553 212 745 e-3 kg mol^-1

deuteron-neutron magnetic moment ratio -0.448 206 52 –

deuteron-proton magnetic moment ratio 0.307 012 2077 –

deuteron-proton mass ratio 1.999 007 500 87 –

deuteron RMS charge radius 2.1413 e-15 m

electron charge to mass quotient -1.758 820 024 e11 C kg^-1

electron-deuteron magnetic moment ratio -2143.923 499 –

electron-deuteron mass ratio 2.724 437 107 484 e-4 –

electron g factor -2.002 319 304 361 82 –

electron gyromagnetic ratio 1.760 859 644 e11 s^-1 T^-1

electron gyromagnetic ratio over 2 pi 28 024.951 64 MHz T^-1

electron-helion mass ratio 1.819 543 074 854 e-4 –

electron magnetic moment -928.476 4620 e-26 J T^-1

electron magnetic moment anomaly 1.159 652 180 91 e-3 –

electron mag. mom. to Bohr magneton ratio -1.001 159 652 180 91 –

electron mag. mom. to nuclear magneton ratio -1838.281 972 34 –

electron mass 9.109 383 56 e-31 kg

electron mass energy equivalent 8.187 105 65 e-14 J

electron mass energy equivalent in MeV 0.510 998 9461 MeV

electron mass in u 5.485 799 090 70 e-4 u

electron molar mass 5.485 799 090 70 e-7 kg mol^-1

electron-muon magnetic moment ratio 206.766 9880 –

electron-muon mass ratio 4.836 331 70 e-3 –

electron-neutron magnetic moment ratio 960.920 50 –

electron-neutron mass ratio 5.438 673 4428 e-4 –

electron-proton magnetic moment ratio -658.210 6866 –

electron-proton mass ratio 5.446 170 213 52 e-4 –

electron-tau mass ratio 2.875 92 e-4 –

electron to alpha particle mass ratio 1.370 933 554 798 e-4 –

electron to shielded helion mag. mom. ratio 864.058 257 –

electron to shielded proton mag. mom. ratio -658.227 5971 –

electron-triton mass ratio 1.819 200 062 203 e-4 –

Fermi coupling constant 1.166 3787 e-5 GeV^-2

fine-structure constant 7.297 352 5664 e-3 –

Hartree energy 4.359 744 650 e-18 J

Hartree energy in eV 27.211 386 02 eV

helion-electron mass ratio 5495.885 279 22 –

helion g factor -4.255 250 616 –

helion magnetic moment -1.074 617 522 e-26 J T^-1

helion mag. mom. to Bohr magneton ratio -1.158 740 958 e-3 –

helion mag. mom. to nuclear magneton ratio -2.127 625 308 –

helion mass 5.006 412 700 e-27 kg

helion mass energy equivalent 4.499 539 341 e-10 J

helion mass energy equivalent in MeV 2808.391 586 MeV

helion mass in u 3.014 932 246 73 u

helion molar mass 3.014 932 246 73 e-3 kg mol^-1

helion-proton mass ratio 2.993 152 670 46 –

inverse fine-structure constant 137.035 999 139 –

muon Compton wavelength 11.734 441 11 e-15 m

muon Compton wavelength over 2 pi 1.867 594 308 e-15 m

muon-electron mass ratio 206.768 2826 –

muon g factor -2.002 331 8418 –

muon magnetic moment -4.490 448 26 e-26 J T^-1

muon magnetic moment anomaly 1.165 920 89 e-3 –

muon mag. mom. to Bohr magneton ratio -4.841 970 48 e-3 –

muon mag. mom. to nuclear magneton ratio -8.890 597 05 –

muon mass 1.883 531 594 e-28 kg

muon mass energy equivalent 1.692 833 774 e-11 J

muon mass energy equivalent in MeV 105.658 3745 MeV

muon mass in u 0.113 428 9257 u

muon molar mass 0.113 428 9257 e-3 kg mol^-1

muon-neutron mass ratio 0.112 454 5167 –

muon-proton magnetic moment ratio -3.183 345 142 –

muon-proton mass ratio 0.112 609 5262 –

muon-tau mass ratio 5.946 49 e-2 –

neutron Compton wavelength 1.319 590 904 81 e-15 m

neutron Compton wavelength over 2 pi 0.210 019 415 36 e-15 m

neutron-electron magnetic moment ratio 1.040 668 82 e-3 –

neutron-electron mass ratio 1838.683 661 58 –

neutron g factor -3.826 085 45 –

neutron gyromagnetic ratio 1.832 471 72 e8 s^-1 T^-1

neutron gyromagnetic ratio over 2 pi 29.164 6933 MHz T^-1

neutron magnetic moment -0.966 236 50 e-26 J T^-1

neutron mag. mom. to Bohr magneton ratio -1.041 875 63 e-3 –

neutron mag. mom. to nuclear magneton ratio -1.913 042 73 –

neutron mass 1.674 927 471 e-27 kg

neutron mass energy equivalent 1.505 349 739 e-10 J

neutron mass energy equivalent in MeV 939.565 4133 MeV

neutron mass in u 1.008 664 915 88 u

neutron molar mass 1.008 664 915 88 e-3 kg mol^-1

neutron-muon mass ratio 8.892 484 08 –

neutron-proton magnetic moment ratio -0.684 979 34 –

neutron-proton mass difference 2.305 573 77 e-30 –

neutron-proton mass diff. energy equiv. 2.072 146 37 e-13 –

neutron-proton mass diff. energy equiv. in MeV 1.293 332 05 –

neutron-proton mass difference in u 0.001 388 449 00 –

neutron-proton mass ratio 1.001 378 418 98 –

neutron-tau mass ratio 0.528 790 –

neutron to shielded proton mag. mom. ratio -0.684 996 94 –

proton charge to mass quotient 9.578 833 226 e7 C kg^-1

proton Compton wavelength 1.321 409 853 96 e-15 m

proton Compton wavelength over 2 pi 0.210 308 910 109 e-15 m

proton-electron mass ratio 1836.152 673 89 –

proton g factor 5.585 694 702 –

proton gyromagnetic ratio 2.675 221 900 e8 s^-1 T^-1

proton gyromagnetic ratio over 2 pi 42.577 478 92 MHz T^-1

proton magnetic moment 1.410 606 7873 e-26 J T^-1

proton mag. mom. to Bohr magneton ratio 1.521 032 2053 e-3 –

proton mag. mom. to nuclear magneton ratio 2.792 847 3508 –

proton magnetic shielding correction 25.691 e-6 –

proton mass 1.672 621 898 e-27 kg

proton mass energy equivalent 1.503 277 593 e-10 J

proton mass energy equivalent in MeV 938.272 0813 MeV

proton mass in u 1.007 276 466 879 u

proton molar mass 1.007 276 466 879 e-3 kg mol^-1

proton-muon mass ratio 8.880 243 38 –

proton-neutron magnetic moment ratio -1.459 898 05 –

proton-neutron mass ratio 0.998 623 478 44 –

proton-tau mass ratio 0.528 063 –

quantum of circulation 3.636 947 5486 e-4 m^2 s^-1

quantum of circulation times 2 7.273 895 0972 e-4 m^2 s^-1

Rydberg constant 10 973 731.568 508 m^-1

Rydberg constant times c in Hz 3.289 841 960 355 e15 Hz

Rydberg constant times hc in eV 13.605 693 009 eV

Rydberg constant times hc in J 2.179 872 325 e-18 J

shielded helion gyromagnetic ratio 2.037 894 585 e8 s^-1 T^-1

shielded helion gyromagnetic ratio over 2 pi 32.434 099 66 MHz T^-1

shielded helion magnetic moment -1.074 553 080 e-26 J T^-1

shielded helion mag. mom. to Bohr ratio -1.158 671 471 e-3 –

shielded helion mag. mom. to nuclear ratio -2.127 497 720 –

shielded helion to proton mm ratio -0.761 766 5603 –

shielded helion to shielded proton mm ratio -0.761 786 1313 –

shielded proton gyromagnetic ratio 2.675 153 171 e8 s^-1 T^-1

shielded proton gyromagnetic ratio over 2 pi 42.576 385 07 MHz T^-1

shielded proton magnetic moment 1.410 570 547 e-26 J T^-1

shielded proton mag. mom. to Bohr ratio 1.520 993 128 e-3 –

shielded proton mag. mom. to nuclear ratio 2.792 775 600 –

tau Compton wavelength 0.697 787 e-15 m

tau Compton wavelength over 2 pi 0.111 056 e-15 m

tau-electron mass ratio 3477.15 –

tau mass 3.167 47 e-27 kg

tau mass energy equivalent 2.846 78 e-10 J

tau mass energy equivalent in MeV 1776.82 MeV

tau mass in u 1.907 49 u

tau molar mass 1.907 49 e-3 kg mol^-1

tau-muon mass ratio 16.8167 –

tau-neutron mass ratio 1.891 11 –

tau-proton mass ratio 1.893 72 –

Thomson cross section 0.665 245 871 58 e-28 m^2

triton-electron mass ratio 5496.921 535 88 –

triton g factor 5.957 924 920 –

triton magnetic moment 1.504 609 503 e-26 J T^-1

triton mag. mom. to Bohr ratio 1.622 393 6616 e-3 –

triton mag. mom. to nuclear ratio 2.978 962 460 –

triton mass 5.007 356 665 e-27 kg

triton mass energy equivalent 4.500 387 735 e-10 J

triton mass energy equivalent in MeV 2808.921 112 MeV

triton mass in u 3.015 500 716 32 u

triton molar mass 3.015 500 716 32 e-3 kg mol^-1

triton-proton mass ratio 2.993 717 033 48 –

weak mixing angle 0.2223 –

EXTENDED CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

EXTENDED CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

EXTENDED CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

EXTENDED CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

EXTENDED CONSTANTS

UNIVERSAL · ELECTROMAGNETIC
PHYSICO-CHEMICAL
ATOMIC-NUCLEAR · EXTENDED

CONSTANT VALUE UNCERTAINTY UNIT

220 lattice spacing of silicon 192.015 5714 e-12 0.000 0032 e-12 m

Angstrom star 1.000 014 95 e-10 0.000 000 90 e-10 m

atomic mass unit-electron volt relationship 931.494 0954 e6 0.000 0057 e6 eV

atomic mass unit-hartree relationship 3.423 177 6902 e7 0.000 000 0016 e7 E h

atomic mass unit-hertz relationship 2.252 342 7206 e23 0.000 000 0010 e23 Hz

atomic mass unit-inverse meter relationship 7.513 006 6166 e14 0.000 000 0034 e14 m^-1

atomic mass unit-joule relationship 1.492 418 062 e-10 0.000 000 018 e-10 J

atomic mass unit-kelvin relationship 1.080 954 38 e13 0.000 000 62 e13 K

atomic mass unit-kilogram relationship 1.660 539 040 e-27 0.000 000 020 e-27 kg

atomic unit of 1st hyper-polarisability 3.206 361 329 e-53 0.000 000 020 e-53 C^3 m^3 J^-2

atomic unit of 2nd hyper-polarisability 6.235 380 085 e-65 0.000 000 077 e-65 C^4 m^4 J^-3

atomic unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

atomic unit of charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

atomic unit of charge density 1.081 202 3770 e12 0.000 000 0067 e12 C m^-3

atomic unit of current 6.623 618 183 e-3 0.000 000 041 e-3 A

atomic unit of electric dipole mom. 8.478 353 552 e-30 0.000 000 052 e-30 C m

atomic unit of electric field 5.142 206 707 e11 0.000 000 032 e11 V m^-1

atomic unit of electric field gradient 9.717 362 356 e21 0.000 000 060 e21 V m^-2

atomic unit of electric polarisability 1.648 777 2731 e-41 0.000 000 0011 e-41 C^2 m^2 J^-1

atomic unit of electric potential 27.211 386 02 0.000 000 17 V

atomic unit of electric quadrupole moment 4.486 551 484 e-40 0.000 000 028 e-40 C m^2

atomic unit of energy 4.359 744 650 e-18 0.000 000 054 e-18 J

atomic unit of force 8.238 723 36 e-8 0.000 000 10 e-8 N

atomic unit of length 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

atomic unit of magnetic dipole moment 1.854 801 999 e-23 0.000 000 011 e-23 J T^-1

atomic unit of magnetic flux density 2.350 517 550 e5 0.000 000 014 e5 T

atomic unit of magnetisability 7.891 036 5886 e-29 0.000 000 0090 e-29 J T^-2

atomic unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

atomic unit of momentum 1.992 851 882 e-24 0.000 000 024 e-24 kg m s^-1

atomic unit of permittivity 1.112 650 056… e-10 (exact) F m^-1

atomic unit of time 2.418 884 326 509 e-17 0.000 000 000 014 e-17 s

atomic unit of velocity 2.187 691 262 77 e6 0.000 000 000 50 e6 m s^-1

conventional value of Josephson constant 483 597.9 e9 (exact) Hz V^-1

conventional value of von Klitzing constant 25 812.807 (exact) ohm

Cu x unit 1.002 076 97 e-13 0.000 000 28 e-13 m

deuteron-electron magnetic moment ratio -4.664 345 535 e-4 0.000 000 026 e-4 –

deuteron-electron mass ratio 3670.482 967 85 0.000 000 13 –

electron volt 1.602 176 6208 e-19 0.000 000 0098 e-19 J

electron volt-atomic mass unit relationship 1.073 544 1105 e-9 0.000 000 0066 e-9 u

electron volt-hartree relationship 3.674 932 248 e-2 0.000 000 023 e-2 E_h

electron volt-hertz relationship 2.417 989 262 e14 0.000 000 015 e14 Hz

electron volt-inverse meter relationship 8.065 544 005 e5 0.000 000 050 e5 m^-1

electron volt-joule relationship 1.602 176 6208 e-19 0.000 000 0098 e-19 J

electron volt-kelvin relationship 1.160 452 21 e4 0.000 000 67 e4 K

electron volt-kilogram relationship 1.782 661 907 e-36 0.000 000 011 e-36 kg

hartree-atomic mass unit relationship 2.921 262 3197 e-8 0.000 000 0013 e-8 u

hartree-electron volt relationship 27.211 386 02 0.000 000 17 eV

hartree-hertz relationship 6.579 683 920 711 e15 0.000 000 000 039 e15 Hz

hartree-inverse meter relationship 2.194 746 313 702 e7 0.000 000 000 013 e7 m^-1

hartree-joule relationship 4.359 744 650 e-18 0.000 000 054 e-18 J

hartree-kelvin relationship 3.157 7513 e5 0.000 0018 e5 K

hartree-kilogram relationship 4.850 870 129 e-35 0.000 000 060 e-35 kg

hertz-atomic mass unit relationship 4.439 821 6616 e-24 0.000 000 0020 e-24 u

hertz-electron volt relationship 4.135 667 662 e-15 0.000 000 025 e-15 eV

hertz-hartree relationship 1.519 829 846 0088 e-16 0.000 000 000 0090 e-16 E_h

hertz-inverse meter relationship 3.335 640 951… e-9 (exact) m^-1

hertz-joule relationship 6.626 070 040 e-34 0.000 000 081 e-34 J

hertz-kelvin relationship 4.799 2447 e-11 0.000 0028 e-11 K

hertz-kilogram relationship 7.372 497 201 e-51 0.000 000 091 e-51 kg

inverse meter-atomic mass unit relationship 1.331 025 049 00 e-15 0.000 000 000 61 e-15 u

inverse meter-electron volt relationship 1.239 841 9739 e-6 0.000 000 0076 e-6 eV

inverse meter-hartree relationship 4.556 335 252 767 e-8 0.000 000 000 027 e-8 E_h

inverse meter-hertz relationship 299 792 458 (exact) Hz

inverse meter-joule relationship 1.986 445 824 e-25 0.000 000 024 e-25 J

inverse meter-kelvin relationship 1.438 777 36 e-2 0.000 000 83 e-2 K

inverse meter-kilogram relationship 2.210 219 057 e-42 0.000 000 027 e-42 kg

joule-atomic mass unit relationship 6.700 535 363 e9 0.000 000 082 e9 u

joule-electron volt relationship 6.241 509 126 e18 0.000 000 038 e18 eV

joule-hartree relationship 2.293 712 317 e17 0.000 000 028 e17 E_h

joule-hertz relationship 1.509 190 205 e33 0.000 000 019 e33 Hz

joule-inverse meter relationship 5.034 116 651 e24 0.000 000 062 e24 m^-1

joule-kelvin relationship 7.242 9731 e22 0.000 0042 e22 K

joule-kilogram relationship 1.112 650 056… e-17 (exact) kg

kelvin-atomic mass unit relationship 9.251 0842 e-14 0.000 0053 e-14 u

kelvin-electron volt relationship 8.617 3303 e-5 0.000 0050 e-5 eV

kelvin-hartree relationship 3.166 8105 e-6 0.000 0018 e-6 E_h

kelvin-hertz relationship 2.083 6612 e10 0.000 0012 e10 Hz

kelvin-inverse meter relationship 69.503 457 0.000 040 m^-1

kelvin-joule relationship 1.380 648 52 e-23 0.000 000 79 e-23 J

kelvin-kilogram relationship 1.536 178 65 e-40 0.000 000 88 e-40 kg

kilogram-atomic mass unit relationship 6.022 140 857 e26 0.000 000 074 e26 u

kilogram-electron volt relationship 5.609 588 650 e35 0.000 000 034 e35 eV

kilogram-hartree relationship 2.061 485 823 e34 0.000 000 025 e34 E_h

kilogram-hertz relationship 1.356 392 512 e50 0.000 000 017 e50 Hz

kilogram-inverse meter relationship 4.524 438 411 e41 0.000 000 056 e41 m^-1

kilogram-joule relationship 8.987 551 787… e16 (exact) J

kilogram-kelvin relationship 6.509 6595 e39 0.000 0037 e39 K

lattice parameter of silicon 543.102 0504 e-12 0.000 0089 e-12 m

molar mass constant 1 e-3 (exact) kg mol^-1

molar mass of carbon-12 12 e-3 (exact) kg mol^-1

molar volume of silicon 12.058 832 14 e-6 0.000 000 61 e-6 m^3 mol^-1

Mo x unit 1.002 099 52 e-13 0.000 000 53 e-13 m

natural unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

natural unit of action in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

natural unit of energy 8.187 105 65 e-14 0.000 000 10 e-14 J

natural unit of energy in MeV 0.510 998 9461 0.000 000 0031 MeV

natural unit of length 386.159 267 64 e-15 0.000 000 18 e-15 m

natural unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

natural unit of momentum 2.730 924 488 e-22 0.000 000 034 e-22 kg m s^-1

natural unit of momentum in MeV/c 0.510 998 9461 0.000 000 0031 MeV/c

natural unit of time 1.288 088 667 12 e-21 0.000 000 000 58 e-21 s

natural unit of velocity 299 792 458 (exact) m s^-1

proton rms charge radius 0.8751 e-15 0.0061 e-15 m

standard acceleration of gravity 9.806 65 (exact) m s^-2

standard atmosphere 101 325 (exact) Pa

standard-state pressure 100 000 (exact) Pa

unified atomic mass unit 1.660 539 040 e-27 0.000 000 020 e-27 kg

CONSTANT VALUE UNCERTAINTY UNIT

220 lattice spacing of silicon 192.015 5714 e-12 0.000 0032 e-12 m

Angstrom star 1.000 014 95 e-10 0.000 000 90 e-10 m

atomic mass unit-electron volt relationship 931.494 0954 e6 0.000 0057 e6 eV

atomic mass unit-hartree relationship 3.423 177 6902 e7 0.000 000 0016 e7 E h

atomic mass unit-hertz relationship 2.252 342 7206 e23 0.000 000 0010 e23 Hz

atomic mass unit-inverse meter relationship 7.513 006 6166 e14 0.000 000 0034 e14 m^-1

atomic mass unit-joule relationship 1.492 418 062 e-10 0.000 000 018 e-10 J

atomic mass unit-kelvin relationship 1.080 954 38 e13 0.000 000 62 e13 K

atomic mass unit-kilogram relationship 1.660 539 040 e-27 0.000 000 020 e-27 kg

atomic unit of 1st hyper-polarisability 3.206 361 329 e-53 0.000 000 020 e-53 C^3 m^3 J^-2

atomic unit of 2nd hyper-polarisability 6.235 380 085 e-65 0.000 000 077 e-65 C^4 m^4 J^-3

atomic unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

atomic unit of charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

atomic unit of charge density 1.081 202 3770 e12 0.000 000 0067 e12 C m^-3

atomic unit of current 6.623 618 183 e-3 0.000 000 041 e-3 A

atomic unit of electric dipole mom. 8.478 353 552 e-30 0.000 000 052 e-30 C m

atomic unit of electric field 5.142 206 707 e11 0.000 000 032 e11 V m^-1

atomic unit of electric field gradient 9.717 362 356 e21 0.000 000 060 e21 V m^-2

atomic unit of electric polarisability 1.648 777 2731 e-41 0.000 000 0011 e-41 C^2 m^2 J^-1

atomic unit of electric potential 27.211 386 02 0.000 000 17 V

atomic unit of electric quadrupole moment 4.486 551 484 e-40 0.000 000 028 e-40 C m^2

atomic unit of energy 4.359 744 650 e-18 0.000 000 054 e-18 J

atomic unit of force 8.238 723 36 e-8 0.000 000 10 e-8 N

atomic unit of length 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

atomic unit of magnetic dipole moment 1.854 801 999 e-23 0.000 000 011 e-23 J T^-1

atomic unit of magnetic flux density 2.350 517 550 e5 0.000 000 014 e5 T

atomic unit of magnetisability 7.891 036 5886 e-29 0.000 000 0090 e-29 J T^-2

atomic unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

atomic unit of momentum 1.992 851 882 e-24 0.000 000 024 e-24 kg m s^-1

atomic unit of permittivity 1.112 650 056… e-10 (exact) F m^-1

atomic unit of time 2.418 884 326 509 e-17 0.000 000 000 014 e-17 s

atomic unit of velocity 2.187 691 262 77 e6 0.000 000 000 50 e6 m s^-1

conventional value of Josephson constant 483 597.9 e9 (exact) Hz V^-1

conventional value of von Klitzing constant 25 812.807 (exact) ohm

Cu x unit 1.002 076 97 e-13 0.000 000 28 e-13 m

deuteron-electron magnetic moment ratio -4.664 345 535 e-4 0.000 000 026 e-4 –

deuteron-electron mass ratio 3670.482 967 85 0.000 000 13 –

electron volt 1.602 176 6208 e-19 0.000 000 0098 e-19 J

electron volt-atomic mass unit relationship 1.073 544 1105 e-9 0.000 000 0066 e-9 u

electron volt-hartree relationship 3.674 932 248 e-2 0.000 000 023 e-2 E_h

electron volt-hertz relationship 2.417 989 262 e14 0.000 000 015 e14 Hz

electron volt-inverse meter relationship 8.065 544 005 e5 0.000 000 050 e5 m^-1

electron volt-joule relationship 1.602 176 6208 e-19 0.000 000 0098 e-19 J

electron volt-kelvin relationship 1.160 452 21 e4 0.000 000 67 e4 K

electron volt-kilogram relationship 1.782 661 907 e-36 0.000 000 011 e-36 kg

hartree-atomic mass unit relationship 2.921 262 3197 e-8 0.000 000 0013 e-8 u

hartree-electron volt relationship 27.211 386 02 0.000 000 17 eV

hartree-hertz relationship 6.579 683 920 711 e15 0.000 000 000 039 e15 Hz

hartree-inverse meter relationship 2.194 746 313 702 e7 0.000 000 000 013 e7 m^-1

hartree-joule relationship 4.359 744 650 e-18 0.000 000 054 e-18 J

hartree-kelvin relationship 3.157 7513 e5 0.000 0018 e5 K

hartree-kilogram relationship 4.850 870 129 e-35 0.000 000 060 e-35 kg

hertz-atomic mass unit relationship 4.439 821 6616 e-24 0.000 000 0020 e-24 u

hertz-electron volt relationship 4.135 667 662 e-15 0.000 000 025 e-15 eV

hertz-hartree relationship 1.519 829 846 0088 e-16 0.000 000 000 0090 e-16 E_h

hertz-inverse meter relationship 3.335 640 951… e-9 (exact) m^-1

hertz-joule relationship 6.626 070 040 e-34 0.000 000 081 e-34 J

hertz-kelvin relationship 4.799 2447 e-11 0.000 0028 e-11 K

hertz-kilogram relationship 7.372 497 201 e-51 0.000 000 091 e-51 kg

inverse meter-atomic mass unit relationship 1.331 025 049 00 e-15 0.000 000 000 61 e-15 u

inverse meter-electron volt relationship 1.239 841 9739 e-6 0.000 000 0076 e-6 eV

inverse meter-hartree relationship 4.556 335 252 767 e-8 0.000 000 000 027 e-8 E_h

inverse meter-hertz relationship 299 792 458 (exact) Hz

inverse meter-joule relationship 1.986 445 824 e-25 0.000 000 024 e-25 J

inverse meter-kelvin relationship 1.438 777 36 e-2 0.000 000 83 e-2 K

inverse meter-kilogram relationship 2.210 219 057 e-42 0.000 000 027 e-42 kg

joule-atomic mass unit relationship 6.700 535 363 e9 0.000 000 082 e9 u

joule-electron volt relationship 6.241 509 126 e18 0.000 000 038 e18 eV

joule-hartree relationship 2.293 712 317 e17 0.000 000 028 e17 E_h

joule-hertz relationship 1.509 190 205 e33 0.000 000 019 e33 Hz

joule-inverse meter relationship 5.034 116 651 e24 0.000 000 062 e24 m^-1

joule-kelvin relationship 7.242 9731 e22 0.000 0042 e22 K

joule-kilogram relationship 1.112 650 056… e-17 (exact) kg

kelvin-atomic mass unit relationship 9.251 0842 e-14 0.000 0053 e-14 u

kelvin-electron volt relationship 8.617 3303 e-5 0.000 0050 e-5 eV

kelvin-hartree relationship 3.166 8105 e-6 0.000 0018 e-6 E_h

kelvin-hertz relationship 2.083 6612 e10 0.000 0012 e10 Hz

kelvin-inverse meter relationship 69.503 457 0.000 040 m^-1

kelvin-joule relationship 1.380 648 52 e-23 0.000 000 79 e-23 J

kelvin-kilogram relationship 1.536 178 65 e-40 0.000 000 88 e-40 kg

kilogram-atomic mass unit relationship 6.022 140 857 e26 0.000 000 074 e26 u

kilogram-electron volt relationship 5.609 588 650 e35 0.000 000 034 e35 eV

kilogram-hartree relationship 2.061 485 823 e34 0.000 000 025 e34 E_h

kilogram-hertz relationship 1.356 392 512 e50 0.000 000 017 e50 Hz

kilogram-inverse meter relationship 4.524 438 411 e41 0.000 000 056 e41 m^-1

kilogram-joule relationship 8.987 551 787… e16 (exact) J

kilogram-kelvin relationship 6.509 6595 e39 0.000 0037 e39 K

lattice parameter of silicon 543.102 0504 e-12 0.000 0089 e-12 m

molar mass constant 1 e-3 (exact) kg mol^-1

molar mass of carbon-12 12 e-3 (exact) kg mol^-1

molar volume of silicon 12.058 832 14 e-6 0.000 000 61 e-6 m^3 mol^-1

Mo x unit 1.002 099 52 e-13 0.000 000 53 e-13 m

natural unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

natural unit of action in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

natural unit of energy 8.187 105 65 e-14 0.000 000 10 e-14 J

natural unit of energy in MeV 0.510 998 9461 0.000 000 0031 MeV

natural unit of length 386.159 267 64 e-15 0.000 000 18 e-15 m

natural unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

natural unit of momentum 2.730 924 488 e-22 0.000 000 034 e-22 kg m s^-1

natural unit of momentum in MeV/c 0.510 998 9461 0.000 000 0031 MeV/c

natural unit of time 1.288 088 667 12 e-21 0.000 000 000 58 e-21 s

natural unit of velocity 299 792 458 (exact) m s^-1

proton rms charge radius 0.8751 e-15 0.0061 e-15 m

standard acceleration of gravity 9.806 65 (exact) m s^-2

standard atmosphere 101 325 (exact) Pa

standard-state pressure 100 000 (exact) Pa

unified atomic mass unit 1.660 539 040 e-27 0.000 000 020 e-27 kg

CONSTANT VALUE UNCERTAINTY UNIT

220 lattice spacing of silicon 192.015 5714 e-12 0.000 0032 e-12 m

Angstrom star 1.000 014 95 e-10 0.000 000 90 e-10 m

atomic mass unit-electron volt relationship 931.494 0954 e6 0.000 0057 e6 eV

atomic mass unit-hartree relationship 3.423 177 6902 e7 0.000 000 0016 e7 E h

atomic mass unit-hertz relationship 2.252 342 7206 e23 0.000 000 0010 e23 Hz

atomic mass unit-inverse meter relationship 7.513 006 6166 e14 0.000 000 0034 e14 m^-1

atomic mass unit-joule relationship 1.492 418 062 e-10 0.000 000 018 e-10 J

atomic mass unit-kelvin relationship 1.080 954 38 e13 0.000 000 62 e13 K

atomic mass unit-kilogram relationship 1.660 539 040 e-27 0.000 000 020 e-27 kg

atomic unit of 1st hyper-polarisability 3.206 361 329 e-53 0.000 000 020 e-53 C^3 m^3 J^-2

atomic unit of 2nd hyper-polarisability 6.235 380 085 e-65 0.000 000 077 e-65 C^4 m^4 J^-3

atomic unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

atomic unit of charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

atomic unit of charge density 1.081 202 3770 e12 0.000 000 0067 e12 C m^-3

atomic unit of current 6.623 618 183 e-3 0.000 000 041 e-3 A

atomic unit of electric dipole mom. 8.478 353 552 e-30 0.000 000 052 e-30 C m

atomic unit of electric field 5.142 206 707 e11 0.000 000 032 e11 V m^-1

atomic unit of electric field gradient 9.717 362 356 e21 0.000 000 060 e21 V m^-2

atomic unit of electric polarisability 1.648 777 2731 e-41 0.000 000 0011 e-41 C^2 m^2 J^-1

atomic unit of electric potential 27.211 386 02 0.000 000 17 V

atomic unit of electric quadrupole moment 4.486 551 484 e-40 0.000 000 028 e-40 C m^2

atomic unit of energy 4.359 744 650 e-18 0.000 000 054 e-18 J

atomic unit of force 8.238 723 36 e-8 0.000 000 10 e-8 N

atomic unit of length 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

atomic unit of magnetic dipole moment 1.854 801 999 e-23 0.000 000 011 e-23 J T^-1

atomic unit of magnetic flux density 2.350 517 550 e5 0.000 000 014 e5 T

atomic unit of magnetisability 7.891 036 5886 e-29 0.000 000 0090 e-29 J T^-2

atomic unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

atomic unit of momentum 1.992 851 882 e-24 0.000 000 024 e-24 kg m s^-1

atomic unit of permittivity 1.112 650 056… e-10 (exact) F m^-1

atomic unit of time 2.418 884 326 509 e-17 0.000 000 000 014 e-17 s

atomic unit of velocity 2.187 691 262 77 e6 0.000 000 000 50 e6 m s^-1

conventional value of Josephson constant 483 597.9 e9 (exact) Hz V^-1

conventional value of von Klitzing constant 25 812.807 (exact) ohm

Cu x unit 1.002 076 97 e-13 0.000 000 28 e-13 m

deuteron-electron magnetic moment ratio -4.664 345 535 e-4 0.000 000 026 e-4 –

deuteron-electron mass ratio 3670.482 967 85 0.000 000 13 –

electron volt 1.602 176 6208 e-19 0.000 000 0098 e-19 J

electron volt-atomic mass unit relationship 1.073 544 1105 e-9 0.000 000 0066 e-9 u

electron volt-hartree relationship 3.674 932 248 e-2 0.000 000 023 e-2 E_h

electron volt-hertz relationship 2.417 989 262 e14 0.000 000 015 e14 Hz

electron volt-inverse meter relationship 8.065 544 005 e5 0.000 000 050 e5 m^-1

electron volt-joule relationship 1.602 176 6208 e-19 0.000 000 0098 e-19 J

electron volt-kelvin relationship 1.160 452 21 e4 0.000 000 67 e4 K

electron volt-kilogram relationship 1.782 661 907 e-36 0.000 000 011 e-36 kg

hartree-atomic mass unit relationship 2.921 262 3197 e-8 0.000 000 0013 e-8 u

hartree-electron volt relationship 27.211 386 02 0.000 000 17 eV

hartree-hertz relationship 6.579 683 920 711 e15 0.000 000 000 039 e15 Hz

hartree-inverse meter relationship 2.194 746 313 702 e7 0.000 000 000 013 e7 m^-1

hartree-joule relationship 4.359 744 650 e-18 0.000 000 054 e-18 J

hartree-kelvin relationship 3.157 7513 e5 0.000 0018 e5 K

hartree-kilogram relationship 4.850 870 129 e-35 0.000 000 060 e-35 kg

hertz-atomic mass unit relationship 4.439 821 6616 e-24 0.000 000 0020 e-24 u

hertz-electron volt relationship 4.135 667 662 e-15 0.000 000 025 e-15 eV

hertz-hartree relationship 1.519 829 846 0088 e-16 0.000 000 000 0090 e-16 E_h

hertz-inverse meter relationship 3.335 640 951… e-9 (exact) m^-1

hertz-joule relationship 6.626 070 040 e-34 0.000 000 081 e-34 J

hertz-kelvin relationship 4.799 2447 e-11 0.000 0028 e-11 K

hertz-kilogram relationship 7.372 497 201 e-51 0.000 000 091 e-51 kg

inverse meter-atomic mass unit relationship 1.331 025 049 00 e-15 0.000 000 000 61 e-15 u

inverse meter-electron volt relationship 1.239 841 9739 e-6 0.000 000 0076 e-6 eV

inverse meter-hartree relationship 4.556 335 252 767 e-8 0.000 000 000 027 e-8 E_h

inverse meter-hertz relationship 299 792 458 (exact) Hz

inverse meter-joule relationship 1.986 445 824 e-25 0.000 000 024 e-25 J

inverse meter-kelvin relationship 1.438 777 36 e-2 0.000 000 83 e-2 K

inverse meter-kilogram relationship 2.210 219 057 e-42 0.000 000 027 e-42 kg

joule-atomic mass unit relationship 6.700 535 363 e9 0.000 000 082 e9 u

joule-electron volt relationship 6.241 509 126 e18 0.000 000 038 e18 eV

joule-hartree relationship 2.293 712 317 e17 0.000 000 028 e17 E_h

joule-hertz relationship 1.509 190 205 e33 0.000 000 019 e33 Hz

joule-inverse meter relationship 5.034 116 651 e24 0.000 000 062 e24 m^-1

joule-kelvin relationship 7.242 9731 e22 0.000 0042 e22 K

joule-kilogram relationship 1.112 650 056… e-17 (exact) kg

kelvin-atomic mass unit relationship 9.251 0842 e-14 0.000 0053 e-14 u

kelvin-electron volt relationship 8.617 3303 e-5 0.000 0050 e-5 eV

kelvin-hartree relationship 3.166 8105 e-6 0.000 0018 e-6 E_h

kelvin-hertz relationship 2.083 6612 e10 0.000 0012 e10 Hz

kelvin-inverse meter relationship 69.503 457 0.000 040 m^-1

kelvin-joule relationship 1.380 648 52 e-23 0.000 000 79 e-23 J

kelvin-kilogram relationship 1.536 178 65 e-40 0.000 000 88 e-40 kg

kilogram-atomic mass unit relationship 6.022 140 857 e26 0.000 000 074 e26 u

kilogram-electron volt relationship 5.609 588 650 e35 0.000 000 034 e35 eV

kilogram-hartree relationship 2.061 485 823 e34 0.000 000 025 e34 E_h

kilogram-hertz relationship 1.356 392 512 e50 0.000 000 017 e50 Hz

kilogram-inverse meter relationship 4.524 438 411 e41 0.000 000 056 e41 m^-1

kilogram-joule relationship 8.987 551 787… e16 (exact) J

kilogram-kelvin relationship 6.509 6595 e39 0.000 0037 e39 K

lattice parameter of silicon 543.102 0504 e-12 0.000 0089 e-12 m

molar mass constant 1 e-3 (exact) kg mol^-1

molar mass of carbon-12 12 e-3 (exact) kg mol^-1

molar volume of silicon 12.058 832 14 e-6 0.000 000 61 e-6 m^3 mol^-1

Mo x unit 1.002 099 52 e-13 0.000 000 53 e-13 m

natural unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

natural unit of action in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

natural unit of energy 8.187 105 65 e-14 0.000 000 10 e-14 J

natural unit of energy in MeV 0.510 998 9461 0.000 000 0031 MeV

natural unit of length 386.159 267 64 e-15 0.000 000 18 e-15 m

natural unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

natural unit of momentum 2.730 924 488 e-22 0.000 000 034 e-22 kg m s^-1

natural unit of momentum in MeV/c 0.510 998 9461 0.000 000 0031 MeV/c

natural unit of time 1.288 088 667 12 e-21 0.000 000 000 58 e-21 s

natural unit of velocity 299 792 458 (exact) m s^-1

proton rms charge radius 0.8751 e-15 0.0061 e-15 m

standard acceleration of gravity 9.806 65 (exact) m s^-2

standard atmosphere 101 325 (exact) Pa

standard-state pressure 100 000 (exact) Pa

unified atomic mass unit 1.660 539 040 e-27 0.000 000 020 e-27 kg

CONSTANT VALUE UNCERTAINTY UNIT

220 lattice spacing of silicon 192.015 5714 e-12 0.000 0032 e-12 m

Angstrom star 1.000 014 95 e-10 0.000 000 90 e-10 m

atomic mass unit-electron volt relationship 931.494 0954 e6 0.000 0057 e6 eV

atomic mass unit-hartree relationship 3.423 177 6902 e7 0.000 000 0016 e7 E h

atomic mass unit-hertz relationship 2.252 342 7206 e23 0.000 000 0010 e23 Hz

atomic mass unit-inverse meter relationship 7.513 006 6166 e14 0.000 000 0034 e14 m^-1

atomic mass unit-joule relationship 1.492 418 062 e-10 0.000 000 018 e-10 J

atomic mass unit-kelvin relationship 1.080 954 38 e13 0.000 000 62 e13 K

atomic mass unit-kilogram relationship 1.660 539 040 e-27 0.000 000 020 e-27 kg

atomic unit of 1st hyper-polarisability 3.206 361 329 e-53 0.000 000 020 e-53 C^3 m^3 J^-2

atomic unit of 2nd hyper-polarisability 6.235 380 085 e-65 0.000 000 077 e-65 C^4 m^4 J^-3

atomic unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

atomic unit of charge 1.602 176 6208 e-19 0.000 000 0098 e-19 C

atomic unit of charge density 1.081 202 3770 e12 0.000 000 0067 e12 C m^-3

atomic unit of current 6.623 618 183 e-3 0.000 000 041 e-3 A

atomic unit of electric dipole mom. 8.478 353 552 e-30 0.000 000 052 e-30 C m

atomic unit of electric field 5.142 206 707 e11 0.000 000 032 e11 V m^-1

atomic unit of electric field gradient 9.717 362 356 e21 0.000 000 060 e21 V m^-2

atomic unit of electric polarisability 1.648 777 2731 e-41 0.000 000 0011 e-41 C^2 m^2 J^-1

atomic unit of electric potential 27.211 386 02 0.000 000 17 V

atomic unit of electric quadrupole moment 4.486 551 484 e-40 0.000 000 028 e-40 C m^2

atomic unit of energy 4.359 744 650 e-18 0.000 000 054 e-18 J

atomic unit of force 8.238 723 36 e-8 0.000 000 10 e-8 N

atomic unit of length 0.529 177 210 67 e-10 0.000 000 000 12 e-10 m

atomic unit of magnetic dipole moment 1.854 801 999 e-23 0.000 000 011 e-23 J T^-1

atomic unit of magnetic flux density 2.350 517 550 e5 0.000 000 014 e5 T

atomic unit of magnetisability 7.891 036 5886 e-29 0.000 000 0090 e-29 J T^-2

atomic unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

atomic unit of momentum 1.992 851 882 e-24 0.000 000 024 e-24 kg m s^-1

atomic unit of permittivity 1.112 650 056… e-10 (exact) F m^-1

atomic unit of time 2.418 884 326 509 e-17 0.000 000 000 014 e-17 s

atomic unit of velocity 2.187 691 262 77 e6 0.000 000 000 50 e6 m s^-1

conventional value of Josephson constant 483 597.9 e9 (exact) Hz V^-1

conventional value of von Klitzing constant 25 812.807 (exact) ohm

Cu x unit 1.002 076 97 e-13 0.000 000 28 e-13 m

deuteron-electron magnetic moment ratio -4.664 345 535 e-4 0.000 000 026 e-4 –

deuteron-electron mass ratio 3670.482 967 85 0.000 000 13 –

electron volt 1.602 176 6208 e-19 0.000 000 0098 e-19 J

electron volt-atomic mass unit relationship 1.073 544 1105 e-9 0.000 000 0066 e-9 u

electron volt-hartree relationship 3.674 932 248 e-2 0.000 000 023 e-2 E_h

electron volt-hertz relationship 2.417 989 262 e14 0.000 000 015 e14 Hz

electron volt-inverse meter relationship 8.065 544 005 e5 0.000 000 050 e5 m^-1

electron volt-joule relationship 1.602 176 6208 e-19 0.000 000 0098 e-19 J

electron volt-kelvin relationship 1.160 452 21 e4 0.000 000 67 e4 K

electron volt-kilogram relationship 1.782 661 907 e-36 0.000 000 011 e-36 kg

hartree-atomic mass unit relationship 2.921 262 3197 e-8 0.000 000 0013 e-8 u

hartree-electron volt relationship 27.211 386 02 0.000 000 17 eV

hartree-hertz relationship 6.579 683 920 711 e15 0.000 000 000 039 e15 Hz

hartree-inverse meter relationship 2.194 746 313 702 e7 0.000 000 000 013 e7 m^-1

hartree-joule relationship 4.359 744 650 e-18 0.000 000 054 e-18 J

hartree-kelvin relationship 3.157 7513 e5 0.000 0018 e5 K

hartree-kilogram relationship 4.850 870 129 e-35 0.000 000 060 e-35 kg

hertz-atomic mass unit relationship 4.439 821 6616 e-24 0.000 000 0020 e-24 u

hertz-electron volt relationship 4.135 667 662 e-15 0.000 000 025 e-15 eV

hertz-hartree relationship 1.519 829 846 0088 e-16 0.000 000 000 0090 e-16 E_h

hertz-inverse meter relationship 3.335 640 951… e-9 (exact) m^-1

hertz-joule relationship 6.626 070 040 e-34 0.000 000 081 e-34 J

hertz-kelvin relationship 4.799 2447 e-11 0.000 0028 e-11 K

hertz-kilogram relationship 7.372 497 201 e-51 0.000 000 091 e-51 kg

inverse meter-atomic mass unit relationship 1.331 025 049 00 e-15 0.000 000 000 61 e-15 u

inverse meter-electron volt relationship 1.239 841 9739 e-6 0.000 000 0076 e-6 eV

inverse meter-hartree relationship 4.556 335 252 767 e-8 0.000 000 000 027 e-8 E_h

inverse meter-hertz relationship 299 792 458 (exact) Hz

inverse meter-joule relationship 1.986 445 824 e-25 0.000 000 024 e-25 J

inverse meter-kelvin relationship 1.438 777 36 e-2 0.000 000 83 e-2 K

inverse meter-kilogram relationship 2.210 219 057 e-42 0.000 000 027 e-42 kg

joule-atomic mass unit relationship 6.700 535 363 e9 0.000 000 082 e9 u

joule-electron volt relationship 6.241 509 126 e18 0.000 000 038 e18 eV

joule-hartree relationship 2.293 712 317 e17 0.000 000 028 e17 E_h

joule-hertz relationship 1.509 190 205 e33 0.000 000 019 e33 Hz

joule-inverse meter relationship 5.034 116 651 e24 0.000 000 062 e24 m^-1

joule-kelvin relationship 7.242 9731 e22 0.000 0042 e22 K

joule-kilogram relationship 1.112 650 056… e-17 (exact) kg

kelvin-atomic mass unit relationship 9.251 0842 e-14 0.000 0053 e-14 u

kelvin-electron volt relationship 8.617 3303 e-5 0.000 0050 e-5 eV

kelvin-hartree relationship 3.166 8105 e-6 0.000 0018 e-6 E_h

kelvin-hertz relationship 2.083 6612 e10 0.000 0012 e10 Hz

kelvin-inverse meter relationship 69.503 457 0.000 040 m^-1

kelvin-joule relationship 1.380 648 52 e-23 0.000 000 79 e-23 J

kelvin-kilogram relationship 1.536 178 65 e-40 0.000 000 88 e-40 kg

kilogram-atomic mass unit relationship 6.022 140 857 e26 0.000 000 074 e26 u

kilogram-electron volt relationship 5.609 588 650 e35 0.000 000 034 e35 eV

kilogram-hartree relationship 2.061 485 823 e34 0.000 000 025 e34 E_h

kilogram-hertz relationship 1.356 392 512 e50 0.000 000 017 e50 Hz

kilogram-inverse meter relationship 4.524 438 411 e41 0.000 000 056 e41 m^-1

kilogram-joule relationship 8.987 551 787… e16 (exact) J

kilogram-kelvin relationship 6.509 6595 e39 0.000 0037 e39 K

lattice parameter of silicon 543.102 0504 e-12 0.000 0089 e-12 m

molar mass constant 1 e-3 (exact) kg mol^-1

molar mass of carbon-12 12 e-3 (exact) kg mol^-1

molar volume of silicon 12.058 832 14 e-6 0.000 000 61 e-6 m^3 mol^-1

Mo x unit 1.002 099 52 e-13 0.000 000 53 e-13 m

natural unit of action 1.054 571 800 e-34 0.000 000 013 e-34 J s

natural unit of action in eV s 6.582 119 514 e-16 0.000 000 040 e-16 eV s

natural unit of energy 8.187 105 65 e-14 0.000 000 10 e-14 J

natural unit of energy in MeV 0.510 998 9461 0.000 000 0031 MeV

natural unit of length 386.159 267 64 e-15 0.000 000 18 e-15 m

natural unit of mass 9.109 383 56 e-31 0.000 000 11 e-31 kg

natural unit of momentum 2.730 924 488 e-22 0.000 000 034 e-22 kg m s^-1

natural unit of momentum in MeV/c 0.510 998 9461 0.000 000 0031 MeV/c

natural unit of time 1.288 088 667 12 e-21 0.000 000 000 58 e-21 s

natural unit of velocity 299 792 458 (exact) m s^-1

proton rms charge radius 0.8751 e-15 0.0061 e-15 m

standard acceleration of gravity 9.806 65 (exact) m s^-2

standard atmosphere 101 325 (exact) Pa

standard-state pressure 100 000 (exact) Pa

unified atomic mass unit 1.660 539 040 e-27 0.000 000 020 e-27 kg

CONSTANT VALUE UNIT

220 lattice spacing of silicon 192.015 5714 e-12 m

Angstrom star 1.000 014 95 e-10 m

atomic mass unit-electron volt relationship 931.494 0954 e6 eV

atomic mass unit-hartree relationship 3.423 177 6902 e7 E h

atomic mass unit-hertz relationship 2.252 342 7206 e23 Hz

atomic mass unit-inverse meter relationship 7.513 006 6166 e14 m^-1

atomic mass unit-joule relationship 1.492 418 062 e-10 J

atomic mass unit-kelvin relationship 1.080 954 38 e13 K

atomic mass unit-kilogram relationship 1.660 539 040 e-27 kg

atomic unit of 1st hyper-polarisability 3.206 361 329 e-53 C^3 m^3 J^-2

atomic unit of 2nd hyper-polarisability 6.235 380 085 e-65 C^4 m^4 J^-3

atomic unit of action 1.054 571 800 e-34 J s

atomic unit of charge 1.602 176 6208 e-19 C

atomic unit of charge density 1.081 202 3770 e12 C m^-3

atomic unit of current 6.623 618 183 e-3 A

atomic unit of electric dipole mom. 8.478 353 552 e-30 C m

atomic unit of electric field 5.142 206 707 e11 V m^-1

atomic unit of electric field gradient 9.717 362 356 e21 V m^-2

atomic unit of electric polarisability 1.648 777 2731 e-41 C^2 m^2 J^-1

atomic unit of electric potential 27.211 386 02 V

atomic unit of electric quadrupole moment 4.486 551 484 e-40 C m^2

atomic unit of energy 4.359 744 650 e-18 J

atomic unit of force 8.238 723 36 e-8 N

atomic unit of length 0.529 177 210 67 e-10 m

atomic unit of magnetic dipole moment 1.854 801 999 e-23 J T^-1

atomic unit of magnetic flux density 2.350 517 550 e5 T

atomic unit of magnetisability 7.891 036 5886 e-29 J T^-2

atomic unit of mass 9.109 383 56 e-31 kg

atomic unit of momentum 1.992 851 882 e-24 kg m s^-1

atomic unit of permittivity 1.112 650 056… e-10 F m^-1

atomic unit of time 2.418 884 326 509 e-17 s

atomic unit of velocity 2.187 691 262 77 e6 m s^-1

conventional value of Josephson constant 483 597.9 e9 Hz V^-1

conventional value of von Klitzing constant 25 812.807 ohm

Cu x unit 1.002 076 97 e-13 m

deuteron-electron magnetic moment ratio -4.664 345 535 e-4 –

deuteron-electron mass ratio 3670.482 967 85 –

electron volt 1.602 176 6208 e-19 J

electron volt-atomic mass unit relationship 1.073 544 1105 e-9 u

electron volt-hartree relationship 3.674 932 248 e-2 E_h

electron volt-hertz relationship 2.417 989 262 e14 Hz

electron volt-inverse meter relationship 8.065 544 005 e5 m^-1

electron volt-joule relationship 1.602 176 6208 e-19 J

electron volt-kelvin relationship 1.160 452 21 e4 K

electron volt-kilogram relationship 1.782 661 907 e-36 kg

hartree-atomic mass unit relationship 2.921 262 3197 e-8 u

hartree-electron volt relationship 27.211 386 02 eV

hartree-hertz relationship 6.579 683 920 711 e15 Hz

hartree-inverse meter relationship 2.194 746 313 702 e7 m^-1

hartree-joule relationship 4.359 744 650 e-18 J

hartree-kelvin relationship 3.157 7513 e5 K

hartree-kilogram relationship 4.850 870 129 e-35 kg

hertz-atomic mass unit relationship 4.439 821 6616 e-24 u

hertz-electron volt relationship 4.135 667 662 e-15 eV

hertz-hartree relationship 1.519 829 846 e-16 E_h

hertz-inverse meter relationship 3.335 640 951… e-9 m^-1

hertz-joule relationship 6.626 070 040 e-34 J

hertz-kelvin relationship 4.799 2447 e-11 K

hertz-kilogram relationship 7.372 497 201 e-51 kg

inverse meter-atomic mass unit relationship 1.331 025 049 00 e-15 u

inverse meter-electron volt relationship 1.239 841 9739 e-6 eV

inverse meter-hartree relationship 4.556 335 252 767 e-8 E_h

inverse meter-hertz relationship 299 792 458 Hz

inverse meter-joule relationship 1.986 445 824 e-25 J

inverse meter-kelvin relationship 1.438 777 36 e-2 K

inverse meter-kilogram relationship 2.210 219 057 e-42 kg

joule-atomic mass unit relationship 6.700 535 363 e9 u

joule-electron volt relationship 6.241 509 126 e18 eV

joule-hartree relationship 2.293 712 317 e17 E_h

joule-hertz relationship 1.509 190 205 e33 Hz

joule-inverse meter relationship 5.034 116 651 e24 m^-1

joule-kelvin relationship 7.242 9731 e22 K

joule-kilogram relationship 1.112 650 056… e-17 kg

kelvin-atomic mass unit relationship 9.251 0842 e-14 u

kelvin-electron volt relationship 8.617 3303 e-5 eV

kelvin-hartree relationship 3.166 8105 e-6 E_h

kelvin-hertz relationship 2.083 6612 e10 Hz

kelvin-inverse meter relationship 69.503 457 m^-1

kelvin-joule relationship 1.380 648 52 e-23 J

kelvin-kilogram relationship 1.536 178 65 e-40 kg

kilogram-atomic mass unit relationship 6.022 140 857 e26 u

kilogram-electron volt relationship 5.609 588 650 e35 eV

kilogram-hartree relationship 2.061 485 823 e34 E_h

kilogram-hertz relationship 1.356 392 512 e50 Hz

kilogram-inverse meter relationship 4.524 438 411 e41 m^-1

kilogram-joule relationship 8.987 551 787… e16 J

kilogram-kelvin relationship 6.509 6595 e39 K

lattice parameter of silicon 543.102 0504 e-12 m

molar mass constant 1 e-3 kg mol^-1

molar mass of carbon-12 12 e-3 kg mol^-1

molar volume of silicon 12.058 832 14 e-6 m^3 mol^-1

Mo x unit 1.002 099 52 e-13 m

natural unit of action 1.054 571 800 e-34 J s

natural unit of action in eV s 6.582 119 514 e-16 eV s

natural unit of energy 8.187 105 65 e-14 J

natural unit of energy in MeV 0.510 998 9461 MeV

natural unit of length 386.159 267 64 e-15 m

natural unit of mass 9.109 383 56 e-31 kg

natural unit of momentum 2.730 924 488 e-22 kg m s^-1

natural unit of momentum in MeV/c 0.510 998 9461 MeV/c

natural unit of time 1.288 088 667 12 e-21 s

natural unit of velocity 299 792 458 m s^-1

proton rms charge radius 0.8751 e-15 m

standard acceleration of gravity 9.806 65 m s^-2

standard atmosphere 101 325 Pa

standard-state pressure 100 000 Pa

unified atomic mass unit 1.660 539 040 e-27 kg