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Inductor Energy Stored Calculator

U = ½LI² — energy stored in the magnetic field of an inductor.

Calculates the energy stored in an inductor's magnetic field from its inductance and the current flowing through it.

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

U = ½ × L × I²

In depth

Calculates the energy stored in an inductor's magnetic field from its inductance and the current flowing through it.