Charge of a material body or particle is the property (acquired or natural) due to which it produces and experiences electrical and magnetic effects. Some of naturally charged particles are electron, proton, α-particle etc.
Charge is a derived physical quantity. The S.I. unit of Charge is coulomb.
In practice we use mC (10–3C), µC (10–6C), nC(10–9C) etc.
C.G.S. unit of charge = electrostatic unit = esu.
1 coulomb = 3 × 109 esu of charge
Dimensional formula of charge = [MºLºT1I1]
For complete information on unit of electric charge watch the video:-