List of Physics Constants
| Name |
Value |
Uncertainty |
Units |
| {220} lattice spacing of silicon |
192.015 5714 e-12 |
0.000 0032 e-12 |
m |
| alpha particle-electron mass ratio |
7294.299 5361 |
0.000 0029 |
|
| alpha particle mass |
6.644 656 75 e-27 |
0.000 000 29 e-27 |
kg |
| alpha particle mass energy equivalent |
5.971 919 67 e-10 |
0.000 000 26 e-10 |
J |
| alpha particle mass energy equivalent in MeV |
3727.379 240 |
0.000 082 |
MeV |
| alpha particle mass in u |
4.001 506 179 125 |
0.000 000 000 062 |
u |
| alpha particle molar mass |
4.001 506 179 125 e-3 |
0.000 000 000 062 e-3 |
kg mol^-1 |
| alpha particle-proton mass ratio |
3.972 599 689 33 |
0.000 000 000 36 |
|
| Angstrom star |
1.000 014 95 e-10 |
0.000 000 90 e-10 |
m |
| atomic mass constant |
1.660 538 921 e-27 |
0.000 000 073 e-27 |
kg |
| atomic mass constant energy equivalent |
1.492 417 954 e-10 |
0.000 000 066 e-10 |
J |
| atomic mass constant energy equivalent in MeV |
931.494 061 |
0.000 021 |
MeV |
| atomic mass unit-electron volt relationship |
931.494 061 e6 |
0.000 021 e6 |
eV |
| atomic mass unit-hartree relationship |
3.423 177 6845 e7 |
0.000 000 0024 e7 |
E_h |
| atomic mass unit-hertz relationship |
2.252 342 7168 e23 |
0.000 000 0016 e23 |
Hz |
| atomic mass unit-inverse meter relationship |
7.513 006 6042 e14 |
0.000 000 0053 e14 |
m^-1 |
| atomic mass unit-joule relationship |
1.492 417 954 e-10 |
0.000 000 066 e-10 |
J |
| atomic mass unit-kelvin relationship |
1.080 954 08 e13 |
0.000 000 98 e13 |
K |
| atomic mass unit-kilogram relationship |
1.660 538 921 e-27 |
0.000 000 073 e-27 |
kg |
| atomic unit of 1st hyperpolarizability |
3.206 361 449 e-53 |
0.000 000 071 e-53 |
C^3 m^3 J^-2 |
| atomic unit of 2nd hyperpolarizability |
6.235 380 54 e-65 |
0.000 000 28 e-65 |
C^4 m^4 J^-3 |
| atomic unit of action |
1.054 571 726 e-34 |
0.000 000 047 e-34 |
J s |
| atomic unit of charge |
1.602 176 565 e-19 |
0.000 000 035 e-19 |
C |
| atomic unit of charge density |
1.081 202 338 e12 |
0.000 000 024 e12 |
C m^-3 |
| atomic unit of current |
6.623 617 95 e-3 |
0.000 000 15 e-3 |
A |
| atomic unit of electric dipole mom. |
8.478 353 26 e-30 |
0.000 000 19 e-30 |
C m |
| atomic unit of electric field |
5.142 206 52 e11 |
0.000 000 11 e11 |
V m^-1 |
| atomic unit of electric field gradient |
9.717 362 00 e21 |
0.000 000 21 e21 |
V m^-2 |
| atomic unit of electric polarizability |
1.648 777 2754 e-41 |
0.000 000 0016 e-41 |
C^2 m^2 J^-1 |
| atomic unit of electric potential |
27.211 385 05 |
0.000 000 60 |
V |
| atomic unit of electric quadrupole mom. |
4.486 551 331 e-40 |
0.000 000 099 e-40 |
C m^2 |
| atomic unit of energy |
4.359 744 34 e-18 |
0.000 000 19 e-18 |
J |
| atomic unit of force |
8.238 722 78 e-8 |
0.000 000 36 e-8 |
N |
| atomic unit of length |
0.529 177 210 92 e-10 |
0.000 000 000 17 e-10 |
m |
| atomic unit of mag. dipole mom. |
1.854 801 936 e-23 |
0.000 000 041 e-23 |
J T^-1 |
| atomic unit of mag. flux density |
2.350 517 464 e5 |
0.000 000 052 e5 |
T |
| atomic unit of magnetizability |
7.891 036 607 e-29 |
0.000 000 013 e-29 |
J T^-2 |
| atomic unit of mass |
9.109 382 91 e-31 |
0.000 000 40 e-31 |
kg |
| atomic unit of mom.um |
1.992 851 740 e-24 |
0.000 000 088 e-24 |
kg m s^-1 |
| atomic unit of permittivity |
1.112 650 056... e-10 |
(exact) |
F m^-1 |
| atomic unit of time |
2.418 884 326 502 e-17 |
0.000 000 000 012 e-17 |
s |
| atomic unit of velocity |
2.187 691 263 79 e6 |
0.000 000 000 71 e6 |
m s^-1 |
| Avogadro constant |
6.022 141 29 e23 |
0.000 000 27 e23 |
mol^-1 |
| Bohr magneton |
927.400 968 e-26 |
0.000 020 e-26 |
J T^-1 |
| Bohr magneton in eV/T |
5.788 381 8066 e-5 |
0.000 000 0038 e-5 |
eV T^-1 |
| Bohr magneton in Hz/T |
13.996 245 55 e9 |
0.000 000 31 e9 |
Hz T^-1 |
| Bohr magneton in inverse meters per tesla |
46.686 4498 |
0.000 0010 |
m^-1 T^-1 |
| Bohr magneton in K/T |
0.671 713 88 |
0.000 000 61 |
K T^-1 |
| Bohr radius |
0.529 177 210 92 e-10 |
0.000 000 000 17 e-10 |
m |
| Boltzmann constant |
1.380 6488 e-23 |
0.000 0013 e-23 |
J K^-1 |
| Boltzmann constant in eV/K |
8.617 3324 e-5 |
0.000 0078 e-5 |
eV K^-1 |
| Boltzmann constant in Hz/K |
2.083 6618 e10 |
0.000 0019 e10 |
Hz K^-1 |
| Boltzmann constant in inverse meters per kelvin |
69.503 476 |
0.000 063 |
m^-1 K^-1 |
| characteristic impedance of vacuum |
376.730 313 461... |
(exact) |
ohm |
| classical electron radius |
2.817 940 3267 e-15 |
0.000 000 0027 e-15 |
m |
| Compton wavelength |
2.426 310 2389 e-12 |
0.000 000 0016 e-12 |
m |
| Compton wavelength over 2 pi |
386.159 268 00 e-15 |
0.000 000 25 e-15 |
m |
| conductance quantum |
7.748 091 7346 e-5 |
0.000 000 0025 e-5 |
S |
| 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 mag. mom. ratio |
-4.664 345 537 e-4 |
0.000 000 039 e-4 |
|
| deuteron-electron mass ratio |
3670.482 9652 |
0.000 0015 |
|
| deuteron g factor |
0.857 438 2308 |
0.000 000 0072 |
|
| deuteron mag. mom. |
0.433 073 489 e-26 |
0.000 000 010 e-26 |
J T^-1 |
| deuteron mag. mom. to Bohr magneton ratio |
0.466 975 4556 e-3 |
0.000 000 0039 e-3 |
|
| deuteron mag. mom. to nuclear magneton ratio |
0.857 438 2308 |
0.000 000 0072 |
|
| deuteron mass |
3.343 583 48 e-27 |
0.000 000 15 e-27 |
kg |
| deuteron mass energy equivalent |
3.005 062 97 e-10 |
0.000 000 13 e-10 |
J |
| deuteron mass energy equivalent in MeV |
1875.612 859 |
0.000 041 |
MeV |
| deuteron mass in u |
2.013 553 212 712 |
0.000 000 000 077 |
u |
| deuteron molar mass |
2.013 553 212 712 e-3 |
0.000 000 000 077 e-3 |
kg mol^-1 |
| deuteron-neutron mag. mom. ratio |
-0.448 206 52 |
0.000 000 11 |
|
| deuteron-proton mag. mom. ratio |
0.307 012 2070 |
0.000 000 0024 |
|
| deuteron-proton mass ratio |
1.999 007 500 97 |
0.000 000 000 18 |
|
| deuteron rms charge radius |
2.1424 e-15 |
0.0021 e-15 |
m |
| electric constant |
8.854 187 817... e-12 |
(exact) |
F m^-1 |
| electron charge to mass quotient |
-1.758 820 088 e11 |
0.000 000 039 e11 |
C kg^-1 |
| electron-deuteron mag. mom. ratio |
-2143.923 498 |
0.000 018 |
|
| electron-deuteron mass ratio |
2.724 437 1095 e-4 |
0.000 000 0011 e-4 |
|
| electron g factor |
-2.002 319 304 361 53 |
0.000 000 000 000 53 |
|
| electron gyromag. ratio |
1.760 859 708 e11 |
0.000 000 039 e11 |
s^-1 T^-1 |
| electron gyromag. ratio over 2 pi |
28 024.952 66 |
0.000 62 |
MHz T^-1 |
| electron-helion mass ratio |
1.819 543 0761 e-4 |
0.000 000 0017 e-4 |
|
| electron mag. mom. |
-928.476 430 e-26 |
0.000 021 e-26 |
J T^-1 |
| electron mag. mom. anomaly |
1.159 652 180 76 e-3 |
0.000 000 000 27 e-3 |
|
| electron mag. mom. to Bohr magneton ratio |
-1.001 159 652 180 76 |
0.000 000 000 000 27 |
|
| electron mag. mom. to nuclear magneton ratio |
-1838.281 970 90 |
0.000 000 75 |
|
| electron mass |
9.109 382 91 e-31 |
0.000 000 40 e-31 |
kg |
| electron mass energy equivalent |
8.187 105 06 e-14 |
0.000 000 36 e-14 |
J |
| electron mass energy equivalent in MeV |
0.510 998 928 |
0.000 000 011 |
MeV |
| electron mass in u |
5.485 799 0946 e-4 |
0.000 000 0022 e-4 |
u |
| electron molar mass |
5.485 799 0946 e-7 |
0.000 000 0022 e-7 |
kg mol^-1 |
| electron-muon mag. mom. ratio |
206.766 9896 |
0.000 0052 |
|
| electron-muon mass ratio |
4.836 331 66 e-3 |
0.000 000 12 e-3 |
|
| electron-neutron mag. mom. ratio |
960.920 50 |
0.000 23 |
|
| electron-neutron mass ratio |
5.438 673 4461 e-4 |
0.000 000 0032 e-4 |
|
| electron-proton mag. mom. ratio |
-658.210 6848 |
0.000 0054 |
|
| electron-proton mass ratio |
5.446 170 2178 e-4 |
0.000 000 0022 e-4 |
|
| electron-tau mass ratio |
2.875 92 e-4 |
0.000 26 e-4 |
|
| electron to alpha particle mass ratio |
1.370 933 555 78 e-4 |
0.000 000 000 55 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 0653 e-4 |
0.000 000 0017 e-4 |
|
| electron volt |
1.602 176 565 e-19 |
0.000 000 035 e-19 |
J |
| electron volt-atomic mass unit relationship |
1.073 544 150 e-9 |
0.000 000 024 e-9 |
u |
| electron volt-hartree relationship |
3.674 932 379 e-2 |
0.000 000 081 e-2 |
E_h |
| electron volt-hertz relationship |
2.417 989 348 e14 |
0.000 000 053 e14 |
Hz |
| electron volt-inverse meter relationship |
8.065 544 29 e5 |
0.000 000 18 e5 |
m^-1 |
| electron volt-joule relationship |
1.602 176 565 e-19 |
0.000 000 035 e-19 |
J |
| electron volt-kelvin relationship |
1.160 4519 e4 |
0.000 0011 e4 |
K |
| electron volt-kilogram relationship |
1.782 661 845 e-36 |
0.000 000 039 e-36 |
kg |
| elementary charge |
1.602 176 565 e-19 |
0.000 000 035 e-19 |
C |
| elementary charge over h |
2.417 989 348 e14 |
0.000 000 053 e14 |
A J^-1 |
| Faraday constant |
96 485.3365 |
0.0021 |
C mol^-1 |
| Faraday constant for conventional electric current |
96 485.3321 |
0.0043 |
C_90 mol^-1 |
| Fermi coupling constant |
1.166 364 e-5 |
0.000 005 e-5 |
GeV^-2 |
| fine-structure constant |
7.297 352 5698 e-3 |
0.000 000 0024 e-3 |
|
| first radiation constant |
3.741 771 53 e-16 |
0.000 000 17 e-16 |
W m^2 |
| first radiation constant for spectral radiance |
1.191 042 869 e-16 |
0.000 000 053 e-16 |
W m^2 sr^-1 |
| hartree-atomic mass unit relationship |
2.921 262 3246 e-8 |
0.000 000 0021 e-8 |
u |
| hartree-electron volt relationship |
27.211 385 05 |
0.000 000 60 |
eV |
| Hartree energy |
4.359 744 34 e-18 |
0.000 000 19 e-18 |
J |
| Hartree energy in eV |
27.211 385 05 |
0.000 000 60 |
eV |
| hartree-hertz relationship |
6.579 683 920 729 e15 |
0.000 000 000 033 e15 |
Hz |
| hartree-inverse meter relationship |
2.194 746 313 708 e7 |
0.000 000 000 011 e7 |
m^-1 |
| hartree-joule relationship |
4.359 744 34 e-18 |
0.000 000 19 e-18 |
J |
| hartree-kelvin relationship |
3.157 7504 e5 |
0.000 0029 e5 |
K |
| hartree-kilogram relationship |
4.850 869 79 e-35 |
0.000 000 21 e-35 |
kg |
| helion-electron mass ratio |
5495.885 2754 |
0.000 0050 |
|
| helion g factor |
-4.255 250 613 |
0.000 000 050 |
|
| helion mag. mom. |
-1.074 617 486 e-26 |
0.000 000 027 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 |
-2.127 625 306 |
0.000 000 025 |
|
| helion mass |
5.006 412 34 e-27 |
0.000 000 22 e-27 |
kg |
| helion mass energy equivalent |
4.499 539 02 e-10 |
0.000 000 20 e-10 |
J |
| helion mass energy equivalent in MeV |
2808.391 482 |
0.000 062 |
MeV |
| helion mass in u |
3.014 932 2468 |
0.000 000 0025 |
u |
| helion molar mass |
3.014 932 2468 e-3 |
0.000 000 0025 e-3 |
kg mol^-1 |
| helion-proton mass ratio |
2.993 152 6707 |
0.000 000 0025 |
|
| hertz-atomic mass unit relationship |
4.439 821 6689 e-24 |
0.000 000 0031 e-24 |
u |
| hertz-electron volt relationship |
4.135 667 516 e-15 |
0.000 000 091 e-15 |
eV |
| hertz-hartree relationship |
1.519 829 846 0045 e-16 |
0.000 000 000 0076 e-16 |
E_h |
| hertz-inverse meter relationship |
3.335 640 951... e-9 |
(exact) |
m^-1 |
| hertz-joule relationship |
6.626 069 57 e-34 |
0.000 000 29 e-34 |
J |
| hertz-kelvin relationship |
4.799 2434 e-11 |
0.000 0044 e-11 |
K |
| hertz-kilogram relationship |
7.372 496 68 e-51 |
0.000 000 33 e-51 |
kg |
| inverse fine-structure constant |
137.035 999 074 |
0.000 000 044 |
|
| inverse meter-atomic mass unit relationship |
1.331 025 051 20 e-15 |
0.000 000 000 94 e-15 |
u |
| inverse meter-electron volt relationship |
1.239 841 930 e-6 |
0.000 000 027 e-6 |
eV |
| inverse meter-hartree relationship |
4.556 335 252 755 e-8 |
0.000 000 000 023 e-8 |
E_h |
| inverse meter-hertz relationship |
299 792 458 |
(exact) |
Hz |
| inverse meter-joule relationship |
1.986 445 684 e-25 |
0.000 000 088 e-25 |
J |
| inverse meter-kelvin relationship |
1.438 7770 e-2 |
0.000 0013 e-2 |
K |
| inverse meter-kilogram relationship |
2.210 218 902 e-42 |
0.000 000 098 e-42 |
kg |
| inverse of conductance quantum |
12 906.403 7217 |
0.000 0042 |
ohm |
| Josephson constant |
483 597.870 e9 |
0.011 e9 |
Hz V^-1 |
| joule-atomic mass unit relationship |
6.700 535 85 e9 |
0.000 000 30 e9 |
u |
| joule-electron volt relationship |
6.241 509 34 e18 |
0.000 000 14 e18 |
eV |
| joule-hartree relationship |
2.293 712 48 e17 |
0.000 000 10 e17 |
E_h |
| joule-hertz relationship |
1.509 190 311 e33 |
0.000 000 067 e33 |
Hz |
| joule-inverse meter relationship |
5.034 117 01 e24 |
0.000 000 22 e24 |
m^-1 |
| joule-kelvin relationship |
7.242 9716 e22 |
0.000 0066 e22 |
K |
| joule-kilogram relationship |
1.112 650 056... e-17 |
(exact) |
kg |
| kelvin-atomic mass unit relationship |
9.251 0868 e-14 |
0.000 0084 e-14 |
u |
| kelvin-electron volt relationship |
8.617 3324 e-5 |
0.000 0078 e-5 |
eV |
| kelvin-hartree relationship |
3.166 8114 e-6 |
0.000 0029 e-6 |
E_h |
| kelvin-hertz relationship |
2.083 6618 e10 |
0.000 0019 e10 |
Hz |
| kelvin-inverse meter relationship |
69.503 476 |
0.000 063 |
m^-1 |
| kelvin-joule relationship |
1.380 6488 e-23 |
0.000 0013 e-23 |
J |
| kelvin-kilogram relationship |
1.536 1790 e-40 |
0.000 0014 e-40 |
kg |
| kilogram-atomic mass unit relationship |
6.022 141 29 e26 |
0.000 000 27 e26 |
u |
| kilogram-electron volt relationship |
5.609 588 85 e35 |
0.000 000 12 e35 |
eV |
| kilogram-hartree relationship |
2.061 485 968 e34 |
0.000 000 091 e34 |
E_h |
| kilogram-hertz relationship |
1.356 392 608 e50 |
0.000 000 060 e50 |
Hz |
| kilogram-inverse meter relationship |
4.524 438 73 e41 |
0.000 000 20 e41 |
m^-1 |
| kilogram-joule relationship |
8.987 551 787... e16 |
(exact) |
J |
| kilogram-kelvin relationship |
6.509 6582 e39 |
0.000 0059 e39 |
K |
| lattice parameter of silicon |
543.102 0504 e-12 |
0.000 0089 e-12 |
m |
| Loschmidt constant (273.15 K, 100 kPa) |
2.651 6462 e25 |
0.000 0024 e25 |
m^-3 |
| Loschmidt constant (273.15 K, 101.325 kPa) |
2.686 7805 e25 |
0.000 0024 e25 |
m^-3 |
| mag. constant |
12.566 370 614... e-7 |
(exact) |
N A^-2 |
| mag. flux quantum |
2.067 833 758 e-15 |
0.000 000 046 e-15 |
Wb |
| molar gas constant |
8.314 4621 |
0.000 0075 |
J mol^-1 K^-1 |
| molar mass constant |
1 e-3 |
(exact) |
kg mol^-1 |
| molar mass of carbon-12 |
12 e-3 |
(exact) |
kg mol^-1 |
| molar Planck constant |
3.990 312 7176 e-10 |
0.000 000 0028 e-10 |
J s mol^-1 |
| molar Planck constant times c |
0.119 626 565 779 |
0.000 000 000 084 |
J m mol^-1 |
| molar volume of ideal gas (273.15 K, 100 kPa) |
22.710 953 e-3 |
0.000 021 e-3 |
m^3 mol^-1 |
| molar volume of ideal gas (273.15 K, 101.325 kPa) |
22.413 968 e-3 |
0.000 020 e-3 |
m^3 mol^-1 |
| molar volume of silicon |
12.058 833 01 e-6 |
0.000 000 80 e-6 |
m^3 mol^-1 |
| Mo x unit |
1.002 099 52 e-13 |
0.000 000 53 e-13 |
m |
| muon Compton wavelength |
11.734 441 03 e-15 |
0.000 000 30 e-15 |
m |
| muon Compton wavelength over 2 pi |
1.867 594 294 e-15 |
0.000 000 047 e-15 |
m |
| muon-electron mass ratio |
206.768 2843 |
0.000 0052 |
|
| muon g factor |
-2.002 331 8418 |
0.000 000 0013 |
|
| muon mag. mom. |
-4.490 448 07 e-26 |
0.000 000 15 e-26 |
J T^-1 |
| muon mag. mom. anomaly |
1.165 920 91 e-3 |
0.000 000 63 e-3 |
|
| muon mag. mom. to Bohr magneton ratio |
-4.841 970 44 e-3 |
0.000 000 12 e-3 |
|
| muon mag. mom. to nuclear magneton ratio |
-8.890 596 97 |
0.000 000 22 |
|
| muon mass |
1.883 531 475 e-28 |
0.000 000 096 e-28 |
kg |
| muon mass energy equivalent |
1.692 833 667 e-11 |
0.000 000 086 e-11 |
J |
| muon mass energy equivalent in MeV |
105.658 3715 |
0.000 0035 |
MeV |
| muon mass in u |
0.113 428 9267 |
0.000 000 0029 |
u |
| muon molar mass |
0.113 428 9267 e-3 |
0.000 000 0029 e-3 |
kg mol^-1 |
| muon-neutron mass ratio |
0.112 454 5177 |
0.000 000 0028 |
|
| muon-proton mag. mom. ratio |
-3.183 345 107 |
0.000 000 084 |
|
| muon-proton mass ratio |
0.112 609 5272 |
0.000 000 0028 |
|
| muon-tau mass ratio |
5.946 49 e-2 |
0.000 54 e-2 |
|
| natural unit of action |
1.054 571 726 e-34 |
0.000 000 047 e-34 |
J s |
| natural unit of action in eV s |
6.582 119 28 e-16 |
0.000 000 15 e-16 |
eV s |
| natural unit of energy |
8.187 105 06 e-14 |
0.000 000 36 e-14 |
J |
| natural unit of energy in MeV |
0.510 998 928 |
0.000 000 011 |
MeV |
| natural unit of length |
386.159 268 00 e-15 |
0.000 000 25 e-15 |
m |
| natural unit of mass |
9.109 382 91 e-31 |
0.000 000 40 e-31 |
kg |
| natural unit of mom.um |
2.730 924 29 e-22 |
0.000 000 12 e-22 |
kg m s^-1 |
| natural unit of mom.um in MeV/c |
0.510 998 928 |
0.000 000 011 |
MeV/c |
| natural unit of time |
1.288 088 668 33 e-21 |
0.000 000 000 83 e-21 |
s |
| natural unit of velocity |
299 792 458 |
(exact) |
m s^-1 |
| neutron Compton wavelength |
1.319 590 9068 e-15 |
0.000 000 0011 e-15 |
m |
| neutron Compton wavelength over 2 pi |
0.210 019 415 68 e-15 |
0.000 000 000 17 e-15 |
m |
| neutron-electron mag. mom. ratio |
1.040 668 82 e-3 |
0.000 000 25 e-3 |
|
| neutron-electron mass ratio |
1838.683 6605 |
0.000 0011 |
|
| neutron g factor |
-3.826 085 45 |
0.000 000 90 |
|
| neutron gyromag. ratio |
1.832 471 79 e8 |
0.000 000 43 e8 |
s^-1 T^-1 |
| neutron gyromag. ratio over 2 pi |
29.164 6943 |
0.000 0069 |
MHz T^-1 |
| neutron mag. mom. |
-0.966 236 47 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 72 |
0.000 000 45 |
|
| neutron mass |
1.674 927 351 e-27 |
0.000 000 074 e-27 |
kg |
| neutron mass energy equivalent |
1.505 349 631 e-10 |
0.000 000 066 e-10 |
J |
| neutron mass energy equivalent in MeV |
939.565 379 |
0.000 021 |
MeV |
| neutron mass in u |
1.008 664 916 00 |
0.000 000 000 43 |
u |
| neutron molar mass |
1.008 664 916 00 e-3 |
0.000 000 000 43 e-3 |
kg mol^-1 |
| neutron-muon mass ratio |
8.892 484 00 |
0.000 000 22 |
|
| neutron-proton mag. mom. ratio |
-0.684 979 34 |
0.000 000 16 |
|
| neutron-proton mass difference |
2.305 573 92 e-30 |
0.000 000 76 e-30 |
|
| neutron-proton mass difference energy equivalent |
2.072 146 50 e-13 |
0.000 000 68 e-13 |
|
| neutron-proton mass difference energy equivalent in MeV |
1.293 332 17 |
0.000 000 42 |
|
| neutron-proton mass difference in u |
0.001 388 449 19 |
0.000 000 000 45 |
|
| neutron-proton mass ratio |
1.001 378 419 17 |
0.000 000 000 45 |
|
| 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 |
|
| Newtonian constant of gravitation |
6.673 84 e-11 |
0.000 80 e-11 |
m^3 kg^-1 s^-2 |
| Newtonian constant of gravitation over h-bar c |
6.708 37 e-39 |
0.000 80 e-39 |
(GeV/c^2)^-2 |
| nuclear magneton |
5.050 783 53 e-27 |
0.000 000 11 e-27 |
J T^-1 |
| nuclear magneton in eV/T |
3.152 451 2605 e-8 |
0.000 000 0022 e-8 |
eV T^-1 |
| nuclear magneton in inverse meters per tesla |
2.542 623 527 e-2 |
0.000 000 056 e-2 |
m^-1 T^-1 |
| nuclear magneton in K/T |
3.658 2682 e-4 |
0.000 0033 e-4 |
K T^-1 |
| nuclear magneton in MHz/T |
7.622 593 57 |
0.000 000 17 |
MHz T^-1 |
| Planck constant |
6.626 069 57 e-34 |
0.000 000 29 e-34 |
J s |
| Planck constant in eV s |
4.135 667 516 e-15 |
0.000 000 091 e-15 |
eV s |
| Planck constant over 2 pi |
1.054 571 726 e-34 |
0.000 000 047 e-34 |
J s |
| Planck constant over 2 pi in eV s |
6.582 119 28 e-16 |
0.000 000 15 e-16 |
eV s |
| Planck constant over 2 pi times c in MeV fm |
197.326 9718 |
0.000 0044 |
MeV fm |
| Planck length |
1.616 199 e-35 |
0.000 097 e-35 |
m |
| Planck mass |
2.176 51 e-8 |
0.000 13 e-8 |
kg |
| Planck mass energy equivalent in GeV |
1.220 932 e19 |
0.000 073 e19 |
GeV |
| Planck temperature |
1.416 833 e32 |
0.000 085 e32 |
K |
| Planck time |
5.391 06 e-44 |
0.000 32 e-44 |
s |
| proton charge to mass quotient |
9.578 833 58 e7 |
0.000 000 21 e7 |
C kg^-1 |
| proton Compton wavelength |
1.321 409 856 23 e-15 |
0.000 000 000 94 e-15 |
m |
| proton Compton wavelength over 2 pi |
0.210 308 910 47 e-15 |
0.000 000 000 15 e-15 |
m |
| proton-electron mass ratio |
1836.152 672 45 |
0.000 000 75 |
|
| proton g factor |
5.585 694 713 |
0.000 000 046 |
|
| proton gyromag. ratio |
2.675 222 005 e8 |
0.000 000 063 e8 |
s^-1 T^-1 |
| proton gyromag. ratio over 2 pi |
42.577 4806 |
0.000 0010 |
MHz T^-1 |
| proton mag. mom. |
1.410 606 743 e-26 |
0.000 000 033 e-26 |
J T^-1 |
| proton mag. mom. to Bohr magneton ratio |
1.521 032 210 e-3 |
0.000 000 012 e-3 |
|
| proton mag. mom. to nuclear magneton ratio |
2.792 847 356 |
0.000 000 023 |
|
| proton mag. shielding correction |
25.694 e-6 |
0.014 e-6 |
|
| proton mass |
1.672 621 777 e-27 |
0.000 000 074 e-27 |
kg |
| proton mass energy equivalent |
1.503 277 484 e-10 |
0.000 000 066 e-10 |
J |
| proton mass energy equivalent in MeV |
938.272 046 |
0.000 021 |
MeV |
| proton mass in u |
1.007 276 466 812 |
0.000 000 000 090 |
u |
| proton molar mass |
1.007 276 466 812 e-3 |
0.000 000 000 090 e-3 |
kg mol^-1 |
| proton-muon mass ratio |
8.880 243 31 |
0.000 000 22 |
|
| proton-neutron mag. mom. ratio |
-1.459 898 06 |
0.000 000 34 |
|
| proton-neutron mass ratio |
0.998 623 478 26 |
0.000 000 000 45 |
|
| proton rms charge radius |
0.8775 e-15 |
0.0051 e-15 |
m |
| proton-tau mass ratio |
0.528 063 |
0.000 048 |
|
| quantum of circulation |
3.636 947 5520 e-4 |
0.000 000 0024 e-4 |
m^2 s^-1 |
| quantum of circulation times 2 |
7.273 895 1040 e-4 |
0.000 000 0047 e-4 |
m^2 s^-1 |
| Rydberg constant |
10 973 731.568 539 |
0.000 055 |
m^-1 |
| Rydberg constant times c in Hz |
3.289 841 960 364 e15 |
0.000 000 000 017 e15 |
Hz |
| Rydberg constant times hc in eV |
13.605 692 53 |
0.000 000 30 |
eV |
| Rydberg constant times hc in J |
2.179 872 171 e-18 |
0.000 000 096 e-18 |
J |
| Sackur-Tetrode constant (1 K, 100 kPa) |
-1.151 7078 |
0.000 0023 |
|
| Sackur-Tetrode constant (1 K, 101.325 kPa) |
-1.164 8708 |
0.000 0023 |
|
| second radiation constant |
1.438 7770 e-2 |
0.000 0013 e-2 |
m K |
| shielded helion gyromag. ratio |
2.037 894 659 e8 |
0.000 000 051 e8 |
s^-1 T^-1 |
| shielded helion gyromag. ratio over 2 pi |
32.434 100 84 |
0.000 000 81 |
MHz T^-1 |
| shielded helion mag. mom. |
-1.074 553 044 e-26 |
0.000 000 027 e-26 |
J T^-1 |
| shielded helion mag. mom. to Bohr magneton ratio |
-1.158 671 471 e-3 |
0.000 000 014 e-3 |
|
| shielded helion mag. mom. to nuclear magneton ratio |
-2.127 497 718 |
0.000 000 025 |
|
| shielded helion to proton mag. mom. ratio |
-0.761 766 558 |
0.000 000 011 |
|
| shielded helion to shielded proton mag. mom. ratio |
-0.761 786 1313 |
0.000 000 0033 |
|
| shielded proton gyromag. ratio |
2.675 153 268 e8 |
0.000 000 066 e8 |
s^-1 T^-1 |
| shielded proton gyromag. ratio over 2 pi |
42.576 3866 |
0.000 0010 |
MHz T^-1 |
| shielded proton mag. mom. |
1.410 570 499 e-26 |
0.000 000 035 e-26 |
J T^-1 |
| shielded proton mag. mom. to Bohr magneton ratio |
1.520 993 128 e-3 |
0.000 000 017 e-3 |
|
| shielded proton mag. mom. to nuclear magneton ratio |
2.792 775 598 |
0.000 000 030 |
|
| speed of light in vacuum |
299 792 458 |
(exact) |
m s^-1 |
| standard acceleration of gravity |
9.806 65 |
(exact) |
m s^-2 |
| standard atmosphere |
101 325 |
(exact) |
Pa |
| standard-state pressure |
100 000 |
(exact) |
Pa |
| Stefan-Boltzmann constant |
5.670 373 e-8 |
0.000 021 e-8 |
W m^-2 K^-4 |
| 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 8734 e-28 |
0.000 000 0013 e-28 |
m^2 |
| triton-electron mass ratio |
5496.921 5267 |
0.000 0050 |
|
| triton g factor |
5.957 924 896 |
0.000 000 076 |
|
| triton mag. mom. |
1.504 609 447 e-26 |
0.000 000 038 e-26 |
J T^-1 |
| triton mag. mom. to Bohr magneton ratio |
1.622 393 657 e-3 |
0.000 000 021 e-3 |
|
| triton mag. mom. to nuclear magneton ratio |
2.978 962 448 |
0.000 000 038 |
|
| triton mass |
5.007 356 30 e-27 |
0.000 000 22 e-27 |
kg |
| triton mass energy equivalent |
4.500 387 41 e-10 |
0.000 000 20 e-10 |
J |
| triton mass energy equivalent in MeV |
2808.921 005 |
0.000 062 |
MeV |
| triton mass in u |
3.015 500 7134 |
0.000 000 0025 |
u |
| triton molar mass |
3.015 500 7134 e-3 |
0.000 000 0025 e-3 |
kg mol^-1 |
| triton-proton mass ratio |
2.993 717 0308 |
0.000 000 0025 |
|
| unified atomic mass unit |
1.660 538 921 e-27 |
0.000 000 073 e-27 |
kg |
| von Klitzing constant |
25 812.807 4434 |
0.000 0084 |
ohm |
| weak mixing angle |
0.2223 |
0.0021 |
|
| Wien frequency displacement law constant |
5.878 9254 e10 |
0.000 0053 e10 |
Hz K^-1 |
| Wien wavelength displacement law constant |
2.897 7721 e-3 |
0.000 0026 e-3 |
m K |