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Inductor stored energy calculator

Find magnetic energy stored in an ideal inductor.

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Your result

Stored energy0.2J

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How to calculate

Find magnetic energy stored in an ideal inductor.

Stored energy = l/1000*i^2/2 J

Worked example

Inductance (mH): 100; Inductor current (A): 2.

Stored energy: 0.2 J.

Assumptions and limits

Uses ideal components and the units shown. This calculation does not establish component ratings, wiring safety or regulatory compliance. Constant inductance is assumed; core saturation and losses are excluded.

Results are rounded for display; calculations use unrounded values. Read our calculation methodology.

Understanding the result

Find magnetic energy stored in an ideal inductor.

When this tool is useful

Stored energy = l/1000*i^2/2 J

Understanding your inputs

InputWhat to enter
Inductance (mH)Enter a number of at least 0 and no more than 1000000000000.
Inductor current (A)Enter a number of at least -1000000000000 and no more than 1000000000000.

Frequently asked questions

What assumptions does this calculation use?

Uses ideal components and the units shown. This calculation does not establish component ratings, wiring safety or regulatory compliance. Constant inductance is assumed; core saturation and losses are excluded.

How is the result calculated?

Stored energy = l/1000*i^2/2 J