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Common Scientific Constants
A reference chart of some common physical and mathematical constants.
| Physical & Mathematical Constants | ||
| Atmosphere (standard) | atm | 101.325 × 103 Pa |
| Atomic mass unit (Dalton) | amu | 1.661 × 10-24 g |
| Avogadro’s number | N | 6.022 × 1023/mol |
| Base of natural log | e | 2.718 |
| Becquerel | Bq | 1 dps |
| Boltzmann constant | k | 1.381 × 10-23 J/K = 3.291 × 10-24 cal/K |
| Curie | Ci | 3.7 × 1010 dps |
| Electron volt | eV | 1.602 × 10-19 J = 3.828 × 10-20 cal |
| Faraday constant | F | 96480 J/v • mol |
| Gas constant | R | 1.987 cal/mol • K = 8.315 J/mol • K |
| Gravitational constant | G | 6.674 × 10-11 Nm2/kg2 |
| Gravity (standard) | g | 9.807 m/s2 |
| Hubble constant | H0 | 69.3 km/s/Mpc = 2.25 × 10-19 s-1 |
| Natural logarithm | ln x | 2.303 log 10x |
| Planck’s constant | h | 1.584 × 10-34 cal • s = 6.626 x 10-34 J • s |
| pi | π | 3.1416 |
| Speed of light (in vacuum) | c | 2.998 × 1010 cm/s |
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