# Coulomb

The **coulomb** (symbol: **C**) is the unit of electric charge in the International System of Units (SI).[2][3] In the present version of the SI it is equal to the electric charge delivered by a 1 ampere constant current in 1 second and to 5×10^{27}/801088317 elementary charges, `e`, (about 6.241509×10^{18} `e`).[3][2]

coulomb | |
---|---|

General information | |

Unit system | SI |

Unit of | electric charge |

Symbol | C |

Named after | Charles-Augustin de Coulomb |

Conversions | |

1 C in ... | ... is equal to ... |

SI base units | A⋅s |

CGS units | ≘ 2997924580 statC |

Atomic units | 6.241509×10^{18} e[1] |