Electrical engineering and electronics · Capacitors

Energy stored in a capacitor

Calculate ideal stored energy from capacitance and voltage across a capacitor.

Published · R0

Method and scope

U = ½CV².

Use energy stored in a capacitor for educational calculation or a clearly scoped arithmetic estimate. Intended for Learners, General educational use.

Inputs
  • Capacitance — F, mF, µF, nF
  • Voltage across capacitor — V, mV, kV
SOURCE AND LIMITS

Assumptions: Voltage is the potential difference across an ideal capacitor. The capacitor is treated as linear with constant capacitance.

Limitations: Stored energy is not the same as deliverable energy in a real circuit.

Method version 1.0.0 · Unit registry and result provenance are shown after calculation. This tool is limited to the documented scope.
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