Q = C V

Example

The relationship between the voltage, charge and capacitance of a capacitor is:

Q = C V

where:

V = voltage across the capacitor (in volts or V)
Q = the charge on the plates of the capacitor (in coulombs or C)
C = the capacitance of the capacitor (in farad or F).

The charge on the plates of the capacitor is 8C. The capacitance of the capacitor is 2F. Solving for the voltage across the capacitor gives:

V = Q/C = (8C)/(2F) = 4V.