Energy and charge stored in a capacitor
The energy and charge stored in a capacitor can be calculated if the voltage and capacitance are known.
Formulas
The following formulas can be used to calculate the energy and charge in a capacitor. You can also calculate the voltage or capacitance if the other values are known.
Energy
Charge
The following formula is needed if you want to calculate the capacitance when only the stored energy and charge are known:
E is the symbol for energy and is measured in joule (J).
C is the symbol for capacitance and is measured in farad (F).
V is the symbol for voltage and is measured in volt (V).
Q is the symbol for charge and is measured in coulomb (C).