| # |
Constant |
Value |
Units |
| 1 |
Speed of light in vacuum |
299792458 |
m s-1 |
| 2 |
Permeability of vacuum |
1.25663706143592e-06 |
N A-2 |
| 3 |
Permittivity of vacuum |
8.854187817e-12 |
F m-1 |
| 4 |
Newtonian constant of gravitation |
6.6725985e-11 ± 8.54093e-15 |
m3 kg-1 s-2 |
| 5 |
Planck constant |
6.62607554e-34 ± 3.97565e-40 |
J s |
| 6 |
Planck constant in eV |
4.135669212e-15 ± 1.2407e-21 |
eV s |
| 7 |
h-bar |
1.0545726663e-34 ± 6.32744e-41 |
J s |
| 8 |
h-bar in eV |
6.58212202e-16 ± 1.97464e-22 |
eV s |
| 9 |
Plank mass |
2.1767114e-08 ± 1.3931e-12 |
kg |
| 10 |
Plank length |
1.616051e-35 ± 1.03427e-39 |
m |
| 11 |
Plank time |
5.3905634e-44 ± 3.44996e-48 |
s |
| 12 |
Elementary charge |
1.6021773349e-19 ± 4.80653e-26 |
C |
| 13 |
Magnetic flux quantum |
2.0678346161e-15 ± 6.2035e-22 |
Wb |
| 14 |
Josephson frequency-voltage quotient |
483597671400000 ± 1.45079e+08 |
V-1 s-1 |
| 15 |
Quantized Hall conductance |
3.8740461417e-05 ± 1.74332e-12 |
Omega-1 |
| 16 |
Quantized Hall resistance |
25812.805612 ± 0.00116158 |
Omega |
| 17 |
Bohr magneton |
9.274015431e-24 ± 3.15317e-30 |
J T-1 |
| 18 |
Bohr magneton in eV |
5.7883826352e-05 ± 5.15166e-12 |
eV T-1 |
| 19 |
Bohr magneton in Hz |
13996241842 ± 4198.87 |
T-1 s-1 |
| 20 |
Bohr magneton in wavenumbers |
46.68643714 ± 1.40059e-05 |
m-1 T-1 |
| 21 |
Bohr magneton in kelvins |
0.671709957 ± 5.70953e-06 |
K T-1 |
| 22 |
Nuclear magneton |
5.050786617e-27 ± 1.71727e-33 |
J T-1 |
| 23 |
Nuclear magneton in eV |
3.1524516628e-08 ± 2.80568e-15 |
eV T-1 |
| 24 |
Nuclear magneton in Hz |
7622591.423 ± 2.28678 |
T-1 s-1 |
| 25 |
Nuclear magneton in wavenumbers ; |
0.025426228177 ± 7.62787e-09 |
m-1 T-1 |
| 26 |
Nuclear magneton in kelvins |
0.000365824631 ± 3.10951e-09 |
K T-1 |
| 27 |
Fine structure constant |
0.0072973530833 ± 3.28381e-10 |
|
| 28 |
Inverse fine structure constant |
137.035989561 ± 6.16662e-06 |
|
| 29 |
Rydberg constant |
10973731.53413 ± 0.0131685 |
m-1 |
| 30 |
Rydberg constant in Hz |
3.289841949939e+15 ± 3.94781e+06 |
s-1 |
| 31 |
Rydberg constant in joules |
2.179874113e-18 ± 1.30792e-24 |
J |
| 32 |
Rydberg constant in eV |
13.60569814 ± 4.08171e-06 |
eV |
| 33 |
Bohr radius |
5.2917724924e-11 ± 2.3813e-18 |
m |
| 34 |
Hartree energy |
4.359748226e-18 ± 2.61585e-24 |
J |
| 35 |
Hartree energy in eV |
27.211396181 ± 8.16342e-06 |
eV |
| 36 |
Quantum of circulation |
9.109389754e-31 ± 5.37454e-37 |
kg |
| 38 |
Electron mass in u |
0.00054857990313 ± 1.26173e-11 |
u |
| 39 |
Electron mass in eV |
510999.0615 ± 0.1533 |
eV |
| 40 |
Electron-muon mass ratio |
0.0048363321871 ± 7.2545e-10 |
|
| 41 |
Electron-proton mass ratio |
0.00054461701311 ± 1.08923e-11 |
|
| 42 |
Electron-deuteron mass ratio |
0.0002724437076 ± 5.44887e-12 |
|
| 43 |
Electron-alpha-particle mass ratio |
0.0001370933543 ± 2.87896e-12 |
|
| 44 |
Electron specific charge |
-175881962530 ± -52764.6 |
C kg-1 |
| 45 |
Electron molar mass |
5.4857990313e-07 ± 1.26173e-14 |
kg mol-1 |
| 46 |
Electron Compton wavelength |
2.4263105822e-12 ± 2.15942e-19 |
m |
| 47 |
Electron Compton wavelength over 2 pi |
3.8615932335e-13 ± 3.43682e-20 |
m |
| 48 |
Electron classical radius |
2.8179409238e-15 ± 3.66332e-22 |
m |
| 49 |
Electron Thomson cross section |
6.652461618e-29 ± 1.79616e-35 |
m2 |
| 50 |
Electron magnetic moment |
9.284770131e-24 ± 3.15682e-30 |
J T-1 |
| 51 |
Electron magnetic moment in Bohr magnetons |
1.0011596521931 ± 1.00116e-11 |
|
| 52 |
Electron magnetic moment in nuclear magnetons |
1838.28200037 ± 3.67656e-05 |
|
| 53 |
Electron magnetic moment anomaly |
0.0011596521931 ± 9.97301e-12 |
|
| 54 |
Electron g-factor |
2.0023193043862 ± 2.00232e-11 |
|
| 55 |
Electron-muon magnetic moment ratio |
206.7669673 ± 3.1015e-05 |
|
| 56 |
Electron-proton magnetic moment ratio |
658.210688166 ± 6.58211e-06 |
|
| 57 |
Muon mass |
1.883532711e-28 ± 1.14895e-34 |
kg |
| 58 |
Muon mass in u |
0.11342891317 ± 1.70143e-08 |
u |
| 59 |
Muon mass in eV |
105658389.34 ± 33.8107 |
eV |
| 60 |
Muon-electron mass ratio |
206.7682623 ± 3.10152e-05 |
|
| 61 |
Muon molar mass |
0.00011342891317 ± 1.70143e-11 |
kg mol-1 |
| 62 |
Muon magnetic moment |
4.490451415e-26 ± 1.48185e-32 |
J T-1 |
| 63 |
Muon magnetic moment in Bohr magnetons |
0.0048419709771 ± 7.26296e-10 |
|
| 64 |
Muon magnetic moment in nuclear magnetons |
8.890598113 ± 1.33359e-06 |
|
| 65 |
Muon magnetic moment anomaly |
0.001165923084 ± 8.39465e-09 |
|
| 66 |
Muon g-factor |
2.00233184617 ± 1.68196e-08 |
|
| 67 |
Muon-proton magnetic moment ratio |
3.1833454747 ± 4.77502e-07 |
|
| 68 |
Proton mass |
1.67262311e-27 ± 9.86848e-34 |
kg |
| 69 |
Proton mass in u |
1.00727647012 ± 1.20873e-08 |
u |
| 70 |
Proton mass in eV |
938272312.8 ± 281.482 |
eV |
| 71 |
Proton-electron mass ratio |
1836.15270137 ± 3.67231e-05 |
|
| 72 |
Proton-muon mass ratio |
8.880244413 ± 1.33204e-06 |
|
| 73 |
Proton specific charge |
95788309.29 ± 28.7365 |
C kg-1 |
| 74 |
Proton molar mass |
0.00100727647012 ± 1.20873e-11 |
kg mol-1 |
| 75 |
Proton Compton wavelength |
1.3214100212e-15 ± 1.17605e-22 |
m |
| 76 |
Proton magnetic moment ; |
1.4106076147e-26 ± 4.79607e-33 |
J T-1 |
| 77 |
Proton magnetic moment in Bohr magnetons |
0.00152103220215 ± 1.52103e-11 |
|
| 78 |
Proton magnetic moment in nuclear magnetons |
2.79284738663 ± 6.42355e-08 |
|
| 81 |
Shielded proton moment in Bohr magnetons |
0.00152099312917 ± 1.67309e-11 |
|
| 82 |
Shielded proton moment in nuclear magnetons |
2.79277564264 ± 6.42338e-08 |
|
| 83 |
Proton gyromagnetic ratio |
267522128.81 ± 80.2566 |
T-1 s-1 |
| 87 |
Neutron mass |
1.67492861e-27 ± 9.88208e-34 |
kg |
| 88 |
Neutron mass in u |
1.00866490414 ± 1.41213e-08 |
u |
| 89 |
Neutron mass in eV |
939565632.8 ± 281.87 |
eV |
| 90 |
Neutron-electron mass ratio |
1838.6836624 ± 4.0451e-05 |
|
| 91 |
Neutron-proton mass ratio |
1.0013784049 ± 9.01241e-09 |
|
| 92 |
Neutron molar mass |
0.00100866490414 ± 1.41213e-11 |
kg mol-1 |
| 93 |
Neutron Compton wavelength |
1.3195911012e-15 ± 1.17444e-22 |
m |
| 94 |
Neutron magnetic moment |
9.66237074e-27 ± 3.96157e-33 |
J T-1 |
| 95 |
Neutron magnetic moment in Bohr magnetons |
0.0010418756325 ± 2.5005e-10 |
|
| 96 |
Neutron magnetic moment in nuclear magnetons |
1.9130427545 ± 4.5913e-07 |
|
| 97 |
Neutron-electron magnetic moment ratio |
0.0010406688225 ± 2.49761e-10 |
|
| 98 |
Neutron-proton magnetic moment ratio |
0.6849793416 ± 1.64395e-07 |
|
| 99 |
Deuteron mass |
3.34358602e-27 ± 1.97272e-33 |
kg |
| 100 |
Deuteron mass in u |
2.01355321424 ± 2.41626e-08 |
u |
| 101 |
Deuteron mass in eV |
1875613395.7 ± 562.684 |
eV |
| 102 |
Deuteron-electron mass ratio |
3670.48301475 ± 7.34097e-05 |
|
| 103 |
Deuteron-proton mass ratio |
0.00201355321424 ± 2.41626e-11 |
kg mol-1 |
| 105 |
Deuteron magnetic moment |
4.330737515e-27 ± 1.47245e-33 |
J T-1 |
| 106 |
Deuteron magnetic moment in Bohr magnetons |
0.85743823024 ± 2.40083e-08 |
|
| 108 |
Deuteron-electron magnetic moment ratio |
0.000466434546091 ± 8.86226e-12 |
|
| 109 |
Deuteron-proton magnetic moment ratio |
0.307012203551 ± 5.21921e-09 |
|
| 110 |
Avagadro constant |
6.022136736e+23 ± 3.55306e+17 |
mol-1 |
| 111 |
Atomic mass constant |
1.66054021e-27 ± 9.79719e-34 |
kg |
| 112 |
Atomic mass constant in eV |
931494322.8 ± 279.448 |
eV |
| 113 |
Faraday constant |
96485.30929 ± 0.0289456 |
C mol-1 |
| 114 |
Molar Planck constant |
3.9903132336e-10 ± 3.55138e-17 |
J s mol-1 |
| 116 |
Molar gas constant |
8.3145107 ± 6.98419e-05 |
J mol-1 K-1 |
| 117 |
Boltzmann constant |
1.38065812e-23 ± 1.17356e-28 |
J K-1 |
| 118 |
Boltzmann constant in eV |
8.61738573e-05 ± 7.2386e-10 |
eV K-1 |
| 119 |
Boltzmann constant in Hz |
20836741800 ± 175029 |
K-1 s-1 |
| 120 |
Boltzmann constant in wavenumbers |
69.5038759 ± 0.000583833 |
m-1 K-1 |
| 121 |
Molar volume (ideal gas), STP |
0.0224141019 ± 1.88278e-07 |
m3 mol-1 |
| 122 |
Loschmidt constant |
2.68676323e+25 ± 2.28375e+20 |
m-3 |
| 123 |
Stefan-Boltzmann constant |
5.6705119e-08 ± 1.92797e-12 |
W m-2 K-4 |
| 124 |
First radiation constant |
3.741774922e-16 ± 2.24506e-22 |
W m2 |
| 125 |
Second radiation constant |
0.0143876912 ± 1.20857e-07 |
m K |
| 126 |
Wien displacement law constant |
0.00289775624 ± 2.43412e-08 |
m K |
| 127 |
Electron volt |
1.66054021e-27 ± 9.79719e-34 |
kg |
| 129 |
Standard atmosphere |
101325 |
Pa |
| 130 |
Standard acceleration of gravity |
9.80665 |
m s-2 |
| 131 |
BIPM-maintained ohm, Omega_69-B1 as of 1 Jan 85 |
1-1.56350e-6 |
Omega |
| 132 |
Drift rate of Omega_69-B1 |
-0.056615 |
muOmega/yr |
| 133 |
BIPM-maintained volt 483 694 GHz(h/2e) |
1-7.5930e-6 |
V |
| 134 |
BIPM maintained ampere A_BIPM |
1-6.0330e-6 |
A |
| 135 |
Cu x-unit: |
1.002077897e-13 ± 7.01455e-20 |
m |
| 136 |
Mo x-unit: |
1.0020993845e-13 ± 4.50945e-20 |
m |
| 137 |
AA *: |
1.0000148192e-10 ± 9.20014e-17 |
m |
| 138 |
Lattice spacing of Si (in vacuum, 295.65 K) |
5.431019611e-10 ± 1.14051e-16 |
m |
| 139 |
Lattice spacing Si (220) plane |
1.920155404e-10 ± 4.03233e-17 |
m |
| 140 |
Molar volume of Si |
1.2058817989e-05 ± 8.92353e-12 |
m3 mol-1 |
