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Electrical Calculators

Energy Stored in Inductor Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
H
A
Verified formula Private

Stored energy

1.0000

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Energy Stored in Inductor Calculator

The Energy Stored in Inductor Calculator works out your stored energy in an instant. Enter inductance and current and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the inductance.
  2. Enter the current.
  3. Read off your stored energy — the calculator updates automatically, with no button to press.

Formula

The Energy Stored in Inductor Calculator uses the formula:

Stored energy = 0.5 × Inductance × Current ^ 2

Worked example

For example, with inductance of 0.5 H and current of 2 A, the stored energy is 1.0000.

Inputs used
Inductance 0.5 H
Current 2 A
Results
Stored energy 1.0000

Results are estimates for educational use, not professional advice.

Frequently asked questions

Use E = ½ × L × I². A 0.5 H inductor carrying 2 A stores 1 joule.

In the magnetic field created by current flowing through the inductor's coil.

Stored energy rises with the square of current, so doubling current stores four times the energy.

The collapsing field releases the stored energy, which can create voltage spikes if not managed.

The Energy Stored in Inductor Calculator uses the formula: Stored energy = 0.5 × Inductance × Current ^ 2. For example, with inductance of 0.5 H and current of 2 A, the stored energy is 1.0000.

Enter the inductance. Enter the current. Read off your stored energy — the calculator updates automatically, with no button to press.

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