Fundamental Physical Constants Name | Symbol | | Value | | Speed of light | c |  | Planck constant | h |  | Planck constant | h |  | Planck hbar |  |  | Planck hbar |  |  | Gravitation constant | G |  | Boltzmann constant | k |  | Boltzmann constant | k |  | Molar gas constant | R |  | Charge of electron | e |  | Permeability of vacuum |  |  | Permittivity of vacuum |  |  | Coulomb constant |  |  | Faraday constant | F |  | Mass of electron |  |  | Mass of electron |  |  | Mass of proton |  |  | Mass of proton |  |  | Mass of neutron |  |  | Mass of neutron |  |  | Atomic mass unit | u |  | Atomic mass unit | u |  | Avogadro's number |  |  | Stefan-Boltzmann constant |  |  | Rydberg constant |  |  | Bohr magneton |  |  | Bohr magneton |  |  | Flux quantum |  |  | Bohr radius |  |  | Standard atmosphere | atm |  | Wien displacement constant | b |  |
| Index
Tables
 NIST Tables |