Inductor Energy Calculator Formula

Understand the math behind the inductor energy calculator. Each variable explained with a worked example.

Use the Inductor Energy Calculator

Formulas Used

Stored Energy

energy_mj = 0.5 * ind_h * pow(current_a, 2) * 1000

Stored Energy (J)

energy_j = 0.5 * ind_h * pow(current_a, 2)

Variables

VariableDescriptionDefault
inductance_mhInductance(mH)10
current_aCurrent(A)1
ind_hDerived value= inductance_mh / 1000calculated

How It Works

Inductor Energy Storage

E = 0.5 x L x I^2

Energy is stored in the magnetic field. It scales with the square of current.

Worked Example

10 mH inductor carrying 1 A.

inductance_mh = 10current_a = 1
  1. 01L = 10 mH = 0.01 H
  2. 02E = 0.5 x 0.01 x 1^2 = 0.005 J = 5 mJ

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