Science & engineering
Capacitor energy calculator
Find stored charge and energy from capacitance and voltage.
A clear answer. Here’s how.
Converts microfarads to farads. Stored charge Q = CV in coulombs; stored energy E = CV²/2 in joules. Assumes an ideal capacitor with constant capacitance, without losses or voltage-dependent behaviour.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Capacitance (µF)
- 1000
- Voltage magnitude (V)
- 12
Example result
- Stored charge (C)
- 0.012
- Stored energy (J)
- 0.072