Coulomb is a unit of measurement of electric charge. The definition for coulomb is the following:
A coulomb is the amount of electricity carried in one second of time by one ampere of current.
The coulomb is the SI derived unit of electric charge, and is approximately equal to the charge of 6.24151 × 1018 protons or −6.24151 × 1018 electrons
The symbol for coulomb is
CCoulomb is one of the base SI units.