# Encyclopedia Magnetica

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calculator:magnetic_coupling_coefficient

## Calculator of magnetic coupling coefficient

The unitless value of the coupling coefficient can be calculated as:

 $$k = \sqrt{1 - \frac{L_{leak}}{L_{total}} }$$ (unitless)

Leakage inductance Lleak = (with all other windings short-circuited; must be smaller than the total inductance)

Total inductance Ltotal =       (with all other windings open-circuited)

Coupling coefficient k = (unitless)

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