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 5×1027/801088317 elementary charges, e, (about 6.241509×1018 e).[3][2]

Charles-Augustin de Coulomb
General information
Unit systemSI
Unit ofelectric charge
Named afterCharles-Augustin de Coulomb
1 C in ...... is equal to ...
   SI base units   As
   CGS units    2997924580 statC
   Atomic units   6.241509×1018 e[1]

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