| Constant |
Symbol |
Value in SI units |
| acceleration of free fall |
g |
9.806 65 m s-2 |
| atomic mass constant |
mu |
1.660539x10-27 kg |
| Avogadro constant |
L, LA. |
6.0221367(36) × 1026( kg-mole)-1 |
| Bohr magneton |
mB |
9.274009x10-24 J T-1 |
| Bohr radius |
a0 |
5.291772x10-11 m |
| Boltzmann constant |
k=R/NA |
1.380658(12) × 10-23 J K-1 |
| conductance quantum |
G0 |
7.748092x10-5 S |
| Electric permittivity of free space |
e0 |
8.854187 817 × 10-12 F m-1 |
| electronic charge |
e |
1.602 177 33 (49) × 10-19 C |
| electronic rest mass |
me |
9.1093897(54) × 10-31 kg |
| electron Compton wavelength |
lc |
2.426310x10-12 m |
| electron magnetic moment |
me |
9.284764x10-24 |
| electron radius |
re |
2.817940x10-15 m |
| electron volt |
eV |
1.602176x10-19 J |
| Euler's constant |
g |
0.577215664901532... |
| fine-structure constant |
a |
7.297353x10-3 |
| first radiation constant |
c1 |
3.741771x10-16 Wm-2 |
| Faraday constant |
F |
9.648 5309(29) × 107 C( kg-mole)-1 |
| gas constant |
R. |
8.314 510(70) × 103 J K-1 ( kg-mole)-1 |
| golden ratio |
f |
1.618033988749894.. |
| gravitational constant |
G |
6.672 59(85) × 10-11 m3 kg-1 s-2 |
| Josephson constant |
KJ |
4.835979x1014 HzV-1 |
| Loschmidt’s Number |
NL |
2.686 763(23) × 1025 m-3 |
| magnetic permeability constant |
m0 |
4p x10-7 =
1.2566370614...x10-6 H m-1 |
| magnetic flux quantum |
F0 |
2.067834x10-15 Wb |
| natural log base |
e |
2.718281828459045... |
| neutron magnetic moment |
mn |
9.662364x10-27 JT-1 |
| neutron rest mass |
mn |
1.674 9286(10) × 10-27 kg |
| nuclear magneton |
mN |
5.050783x10-27 JT-1 |
| pi |
p |
3.14159265358979323846264... |
| Planck constant |
h |
6.626 0755(40) × 10-34 J s |
| proton Compton wavelength |
lc,p |
1.321410x10-15 m |
| proton magnetic moment |
mp |
1.410607x10-26 JT-1 |
| proton rest mass |
mp |
1.672 6231(10) × 10-27 kg |
| Rydberg constant |
Rh |
1.097373x107 m-1 |
| second radiation constant |
c2 |
1.438775x10-2 m K |
| speed of light |
c |
2.997 924 58 × 108 m s-1 |
| standard volume of ideal gas |
V0 |
2.24136x10-2 m3 mol-1 |
| Stefan-Boltzmann constant |
s |
5.670 51(19)× 10-8 W m-2 K-4 |
| universal gas constant |
R |
8.314472 J/mol K |
| Wien displacement law constant |
b |
2.897769x10-3 m K |