Inductors in Parallel Calculator

About this calculator

When two or more inductors are wired in parallel with no mutual coupling between them, their combined inductance follows the same reciprocal-sum pattern as resistors in parallel: 1/Lt = 1/L₁ + 1/L₂ + ... + 1/Ln. That means the total inductance is always smaller than the smallest individual inductor in the group — adding more parallel paths gives the magnetic flux more routes to take, reducing the overall opposition to changing current.

This calculator takes two to four inductor values and returns the total parallel inductance using that formula. Electronics hobbyists building filters or resonant circuits, and RF and power electronics engineers use it when designing circuits that need a specific combined inductance not available as a single off-the-shelf component, or when analyzing how paralleled chokes will behave together — keeping in mind that the formula assumes negligible mutual inductance, which doesn't hold if the coils are wound close enough to couple magnetically.