Capacitor Energy Calculator

Result: Joules


Calculating the energy stored in a capacitor is a crucial aspect of electronic design and analysis. The capacitor energy calculator provides a handy tool for engineers and enthusiasts to determine the energy stored in a capacitor based on its capacitance and voltage. In this article, we will guide you on how to use the calculator, understand the underlying formula, and provide a functional code for the calculator.

How to Use

Using the capacitor energy calculator is straightforward. Enter the capacitance (in farads) and voltage (in volts) values into the designated input fields. Click the “Calculate” button, and the calculator will display the energy stored in the capacitor. This tool proves valuable in various electronic applications where understanding the energy storage capability of capacitors is essential.


The energy (E) stored in a capacitor is calculated using the formula:


  • E is the energy stored in the capacitor (in joules),
  • C is the capacitance of the capacitor (in farads),
  • V is the voltage across the capacitor (in volts).

Example Solve

Suppose you have a capacitor with a capacitance of 100 microfarads (uF) and a voltage of 10 volts. Plugging these values into the formula:

Calculating this expression yields the energy stored in the capacitor.


Q: Can I use this calculator for any unit of capacitance and voltage?

A: Yes, you can use any unit for capacitance (F, uF, nF, etc.) and voltage (V, mV, kV, etc.), as long as you stay consistent.

Q: How accurate is the provided formula for calculating capacitor energy?

A: The formula is precise for ideal capacitors in a steady-state, assuming no losses or leakage.

Q: Can this calculator be used for multiple capacitors in a circuit?

A: No, this calculator is designed for a single capacitor. For multiple capacitors, calculate each separately and sum the individual energies.


The capacitor energy calculator is a valuable tool for anyone working with electronic circuits. By understanding the formula and utilizing the provided HTML and JS code, you can effortlessly determine the energy stored in a capacitor. Remember to input the correct values for capacitance and voltage, and the calculator will provide accurate results.

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