Table of Universal Constants
| Quantity | Symbol | Value | Relative Standard Uncertainty |
|---|---|---|---|
| speed of light in vacuum | 299 792 458 m·s−1 | defined | |
| Newtonian constant of gravitation | 6.67384(80)×10−11 m3·kg−1·s−2 | 1.2 × 10−4 | |
| Planck constant | 6.626 069 57(29) × 10−34 J·s | 4.4 × 10−8 | |
| reduced Planck constant | 1.054 571 726(47) × 10−34 J·s | 4.4 × 10−8 |
Read more about this topic: Physical Constant
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