Capacitor energy Calculator

How to calculate capacitor energy

This tool calculates capacitor energy from Capacitance (F), Voltage (V). Enter each quantity in its labelled field, then use the formula below to check the calculation.

Formula

capacitance × voltage² ÷ 2

Worked example

Capacitance (F)

0.001

Voltage (V)

12

Applying the formula to these values gives 0.072 J.

What should I check?

Use SI units to explore mechanics, waves and basic DC electrical arithmetic. These are idealised educational formulas, not engineering specifications.

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