Capacitor Energy and Charge Calculator

Your details

The capacitance of the capacitor. Leave blank to solve for it.
The voltage across the capacitor. Leave blank to solve for it.
The electric charge stored on the capacitor plates. Enter a value to use it in the calculation; leave 0 to compute it.
The energy stored in the capacitor. Enter a value to use it in the calculation; leave 0 to compute it.
Stored energy (E)
7.2

Energy stored in the electric field between the capacitor plates

Energy unitmJ
Stored charge (Q)1.2
Charge unitmC
Voltage (V)12V
Capacitance (C)0.0001F
Energy (auto-scaled)7.200 mJ
Charge (auto-scaled)1.200 mC
7.2 mJ
Micro-energy (nJ range)<0.001Small bypass/signal0.001-1Power supply bulk1-100High energy - use caution100+

100.0 uF at 12.00 V stores 7.200 mJ of energy.

  • This capacitor stores 7.200 mJ of energy and 1.200 mC of charge at 12.00 V.
  • Doubling the voltage would quadruple the stored energy (energy scales with V squared).
  • Doubling the capacitance would double both the charge and the stored energy at the same voltage.
  • This energy level is common in power supply bulk capacitors.

Next stepVerify that your capacitor is rated for at least 12.00 V to prevent dielectric breakdown.

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