Coulomb (unit)

The coulomb, abbreviated C, is the SI unit of electric charge. It is defined as the amount of charge passing a point in one second in a circuit with one ampere of current.

The coulomb is named for Charles-Augustin de Coulomb (1736 - 1806), a French physicist who developed the law of electrostatic attraction and repulsion, named Coulomb's law in his honor.

The coulomb is a derived unit in the SI, equal to 1 A·s.
 * C = A &sdot; s

One coulomb is &minus;6.241&thinsp;509&thinsp;647 ·1018 times the charge e of an electron.