---
title: "Parallel Inductors Calculator - Equivalent Inductance"
description: "Calculate equivalent inductance of inductors connected in parallel using reciprocal sum formulas."
image: "https://onlineminitools.com/tools/parallel-inductors-calculator/logo.svg"
---

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# Parallel Inductors Calculator

Calculate equivalent inductance of inductors connected in parallel using reciprocal sum formulas.

      O M T

## Inductors in Parallel

Parallel inductor branches share the same voltage and carry separate currents. Equivalent inductance is found from reciprocal sums, similar to parallel resistors.

## Formula

 $$\frac{1}{L_{eq}} = \frac{1}{L_1} + \frac{1}{L_2} + \frac{1}{L_3} + \cdots$$

Equivalent inductance is always less than the smallest branch value when all branches are positive.

## Practical Considerations

Real inductors include winding resistance and coupling. This calculator assumes ideal, uncoupled branches. For coupled windings, mutual inductance changes the result.

Related tools: [Parallel Resistor Calculator](https://onlineminitools.com/parallel-resistor-calculator) and [Impedance Calculator](https://onlineminitools.com/impedance-calculator).

## Frequently Asked Questions

   **Why is parallel inductance smaller than any single branch?**

Multiple paths carry current in parallel, reducing the net opposition to current change.

   **What if one inductor value is zero?**

An ideal zero-henry branch would dominate and make equivalent inductance zero. Remove shorted branches from the model.

   **Does mutual inductance affect parallel coils?**

Yes. Coupled inductors need mutual-inductance analysis instead of simple reciprocal addition.

   **Can I combine mH and µH values directly?**

Convert to a common unit first. This tool keeps all entries in one selected unit.

   **How is this different from series inductors?**

Series inductances add directly, while parallel inductances combine through reciprocals.

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