# Capacitor Energy

Calculates the stored Energy in a Capacitor. Used formulas are,

`E = 1/2*C*V^2 = 1/2*Q*V = 1/2*Q^2/C`

**Enter 'x' in the field to be calculated.**

This tool calculates the stored Energy in a Capacitor.

E : Stored energy in the Capacitor in joules (J)

C : Capacitance of the Capacitor in farad (F)

V : Voltage across the terminal of the capacitor in volt (V)

Q : Electrical charge stored in the Capacitor in coulomb (C)

Knowing that Q (charge), C (capacitance) and V (voltage) are related by below relationship, we get three equivalent formulas that calculates the stored Energy in an ideal Capacitor.

`Q = C*V` |

## Formula using Capacitance C and Voltage V

`E = 1/2*C*V^2` |

## Formula using Charge Q and Voltage V,

`E = 1/2*Q*V` |

## Formula using Charge Q and Capacitance C,

`E = 1/2*Q^2/C` |

## See also

Unit Conversion tools

Capacitor Charge

Equivalent Capacitance

Energy in an Inductor

Electricity Calculators

Physics Calculators