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Capacitor Stored Energy Calculator
Find ideal stored charge and energy from capacitance and voltage.
Your result
EVERYDAYEnter your values and select calculate.
On this page How it works & practical examples
How to use the Capacitor Stored Energy Calculator
Enter the voltage across the capacitor rather than a source voltage before circuit losses. The capacitance input is in microfarads.
The calculation
E = ½ C V²; charge Q = C V
Worked example
1,000 µF charged to 12 V ideally stores 0.072 joules and 0.012 coulombs.
Assumptions and limits
Ideal constant capacitance. Losses, equivalent series resistance, discharge waveform and safe handling requirements are outside this arithmetic model.
Common questions
Which inputs should I use?
Enter the voltage across the capacitor rather than a source voltage before circuit losses. The capacitance input is in microfarads.
What does the result exclude?
Ideal constant capacitance. Losses, equivalent series resistance, discharge waveform and safe handling requirements are outside this arithmetic model.