Statcoulomb

The statcoulomb (statC) or franklin (Fr) or electrostatic unit of charge (esu) is the physical unit for electrical charge used in the esu-cgs (centimetre-gram-second system of units) and Gaussian units. It is a derived unit given by

The SI system of units uses the coulomb (C) instead. The conversion between C and statC is different in different contexts. The most common contexts are: