Capacitor joule calculator

Free online capacitor joule calculator – Calculate capacitor joules effortlessly with our user-friendly online calculator. Input capacitance and voltage to determine energy storage capacity in joules.

Kinetic Energy Calculatorjoule calculator
Gravitational potential energy calculatorAll Physics Calculator

Capacitor joule formula

The formula to calculate the energy stored in a capacitor is:

E = 1/2 * C * V²


  • E = Energy stored in the capacitor, measured in joules (J).
  • C = Capacitance of the capacitor, measured in farads (F).
  • V = Voltage applied across the capacitor, measured in volts (V).

How to calculate capacitor energy in a joule?

To calculate the energy stored in a capacitor, you need to know the capacitance of the capacitor (C) and the voltage applied across it (V).

Follow these steps to calculate the capacitor energy:

  • Step 1: Determine the capacitance (C) of the capacitor.
  • Step 2: Measure the voltage (V) applied across the capacitor.
  • Step 3: Use the formula to calculate the energy (E) stored in the capacitor:
  • Energy (E) = 0.5 * C * V²


Exercise – A capacitor with a capacitance of 10 microfarads (10 μF) and a voltage of 50 volts (V) is applied across it then calculate the energy(joule) stored in a capacitor.

Energy (E) = 1/2 * C * V²
Energy = 0.5 * 10 * 2500
Energy = 0.5 * 10 * 2500 μJ = 0.5 * 25000 μJ = 12500 μJ
So, the energy stored in this capacitor is 12,500 microjoules (μJ) or 0.0125 joules (J).

More Calculator

Displacement CalculatorSpeed Calculator
Pigeon velocity calculatorinches per second calculator
Net force CalculatorForce Calculator