| Speed of light | c | 3.00 x 108 m/s |
| Gravitational constant | G | 6.67 x 10-11 Nm2 |
| Avogadro constant | NA | 6.02 x 1023 mol-1 |
| Universal gas constant | R | 8.31 J/molK |
| Mass-energy relation | c2 | 8.99 x 1016 J/kg 931.5 MeV/u |
| Permittivity constant | e0 | 8.85 x 10-12 F/m |
| Permeability constant | m0 | 1.26 x 10-6 H/m |
| Planck constant | h | 6.63 x 10-34 J s |
| Boltzmann constant | k | 1.38 x 10-23 J/K 8.62 x 10-5 eV/K |
| Elementary charge | e | 1.60 x 10-19 C |
| Electron mass | me | 9.11 x 10-31 kg 5.49 x 10-4 u |
| Proton mass | mp | 1.67 x 10-27 kg 1.0073 u |
| Bohr radius | rB | 5.29 x 10-11 m |
| Bohr magneton | mB | 9.27 x 10-24 J/T 5.79 x 10-5 eV/T |
| Nuclear magneton | mN | 5.05 x 10-27 J/T |
| Ratio of proton mass to electron mass | mp/me | 1840 |
| Rydberg constant | R | 1.10 x 107 m-1 |
| Electron magnetic moment | me | 9.28 x 10-24 J/T |
| Proton magnetic moment | mp | 1.41 x 10-26 J/T |
