| Quantity |
Value |
Unit |
| Absolute zero |
-273.16 |
°C |
| Acceleration of free fall |
9.80665 |
m s-2 |
| Avogadro constant |
6.0221367 E23 |
1 mol-1 |
| Base of natural logarithms |
2.718281828 |
|
| Bohr magneton |
9.2740154 E-24 |
J T-1 |
| Bohr radius |
5.29177249 E-11 |
m |
| Boltzmann constant |
1.380658 E-23 |
J K-1 |
| Classical electron radius |
2.81794092 E-15 |
m |
| Dirac's constant |
1.0545887 E-34 |
J s |
| Elementary charge |
1.60217733 E-19 |
C |
| Electron mass |
9.1093897 E-31 |
kg |
| Electron-proton mass ratio |
5.44617013 E-4 |
|
| Electronvolt |
1.6021892 E-19 |
J |
| Faraday constant |
96485.309 |
C mol-1 |
| Feigenbaum's constant |
4.669210609102990 |
|
| Fine-structure constant |
7.29735308 E-3 |
|
| First radiation constant |
3.7417749 E-16 |
W m2 |
| Newtonian constant of gravitation |
6.67259 E-11 |
N m2 kg-2 |
| Hydrogen Rydberg number |
1.0967758 E7 |
m-1 |
| Josephson frequency-voltage quotient |
4.8359767 E14 |
Hz V-1 |
| Loschmidt constant |
2.686763 E25 |
m-3 |
| Magnetic flux quantum |
2.06783461 E-15 |
Wb |
| Molar gas constant |
8.314510 |
J mol-1 K-1 |
| Molar Planck constant |
3.99031323 E-10 |
J s mol-1 |
| Molar volume of ideal gas |
0.02241410 |
m3 mol-1 |
| Standard pressure |
101325 |
Pa |
| Nuclear magneton |
5.0507866 E-27 |
J T-1 |
| Permeability of vacuum |
12.566370614 E-7 |
N A-2 |
| Permittivity of vacuum |
8.854187817 E-12 |
F m-1 |
| Pi |
3.1415926535897932 |
|
| Planck constants |
6.6260755 E-34 |
J s |
| Rydberg constant |
10973731.534 |
m-1 |
| second radiation constant |
0.01438769 |
m K |
| solar constant |
1400 |
W m-2 |
| speed of light in vacuum |
299792458 |
m s-1 |
| speed of sound in air at STP |
340 |
m s-1 |
| Stefan-Boltzmann constant |
5.67051 E-8 |
W m-2 K-4 |
| Quantity |
Value |
Unit |
Fundamental Physical Constants