| Planck constant | h | 6.626 075 5 × 10-34 J s |
| Planck constant over 2 pi | h bar | 1.054 572 66 × 10-34 J s |
| Permeability of vacuum | m0 | 4pi × 10-7 = 12.566 370 614... × 10-7 N A-2 |
| Permittivity of vacuum | e0 | 8.854 187 817... × 10-12 F m-1 |
| Speed of light | c | 299 792 458 m s-1 |
| Newtonian constant of gravitation | G | 6.672 59 × 10-11 m3 kg-1 s-2 |
| Elementary charge | e | 1.602 177 33 × 10-19 C 1.602 177 33 × 10-19 C |
| Bohr magneton | bm | 9.2740154 × 10-24 J T-1 |