| Speed of light | c | 2.997x108 m s−1 |
| Planck constant | h | 6.626x10−34 J s |
| Boltzmann constant | kB | 1.381x10−23 J K−1s |
| Gas constant | R | 8.314 J K−1 mol−1s |
| Faraday constant | F | 96490 C mol−1s |
| Elementary charge | e | 1.602x10−19 C |
| Avogadro constant | NA | 6.022x1023 mol−1 |
| Electron mass | me | 9.109x10−31 kg |
| Proton mass | mp | 1.673x10−27 kg |
| Vacuum permittivity | ε0 | 8.854x10−12 J−1 C2 m−1 |
| Atomic mass unit | u | 1.661x10−27 kg |