About this tool: Capacitor Energy and Charge
Calculate the stored energy and electric charge of an ideal capacitor from capacitance and voltage.
Capacitance is entered in microfarads and voltage in volts. The calculation converts microfarads to farads before finding E=CV²/2 in joules and Q=CV in coulombs. Capacitance must be positive; zero voltage gives zero energy and charge. The model ignores leakage and dielectric losses.
How the calculation works
Worked example
| Capacitance, µF | 100 |
| Voltage, V | 12 |
E = 0.0072 J; Q = 0.0012 C
Questions and answers
What does this tool do?
Calculate the stored energy and electric charge of an ideal capacitor from capacitance and voltage. Capacitance is entered in microfarads and voltage in volts. The calculation converts microfarads to farads before finding E=CV²/2 in joules and Q=CV in coulombs. Capacitance must be positive; zero voltage gives zero energy and charge. The model ignores leakage and dielectric losses.
What affects precision and input format?
Nominal ideal components are used; component losses and tolerances are excluded.
Where are the calculations performed?
The calculation runs in your browser. You can use the tool without installing software.
Asted Cloud
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