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Coulomb (C)

Quantity: Electric charge · Category: Derived SI

The coulomb is the SI unit of electric charge: the charge carried by a current of one ampere flowing for one second. It is named after Charles-Augustin de Coulomb, who quantified the force between charges.

Relation to SI

1 C = 1 A·s

Examples

  • A single electron carries about 1.6×10⁻¹⁹ coulombs.
  • A lightning bolt transfers roughly 15 coulombs of charge.