Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Coupling coefficient

Required number input.

Inductance L1 (H)

Required number input.

Inductance L2 (H)

Required number input.

Calculate the mutual inductance of two coupled inductors. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Mutual inductance (H)

The resulting mutual inductance returned as a number.

• Inductor calculations depend on core material, air gap, turns, frequency, waveform, temperature, DC bias, copper resistance, skin and proximity effects, fringing, and saturation definition. Small-signal inductance and nominal current rating may not describe switching operation.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Coupling Coefficient

  Calculate the coupling coefficient of two coupled inductors.

• Parallel Inductors

  Calculate the total inductance of two inductors connected in parallel.

• Series Inductors

  Calculate the total inductance of two inductors connected in series.