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Series Inductance Calculator

This calculator determines the total inductance of inductors connected in series. It’s useful in circuit design, filter creation, and power electronics where inductive components are combined to achieve a specific total value.

Total Inductance of Series-Connected Coils

Input Fields
L_n
Enter inductance values separated by commas (µH)
If enabled, the result will update automatically when you change any value.

Series Inductance Addition Formula

Formula
$$L_{\text{total}} = L_1 + L_2 + L_3 + \ldots + L_n$$

Where:

  • $$L_{ ext{total}}$$ = total inductance (H)
  • $$L_1$$, $$L_2$$, $$\ldots$$, $$L_n$$ = individual inductances (H)

Inductances in series simply add up, assuming no mutual coupling.


Series Inductance – Calculation Example

Given:

  • $$L_1$$ = 10 mH
  • $$L_2$$ = 22 mH
  • $$L_3$$ = 3.3 mH

Calculation:

  1. $$L_{\text{total}} = 10 + 22 + 3.3 = 35.3~\text{mH}$$


When inductors are connected in series, their total inductance increases as the magnetic fields reinforce each other. This is commonly used in power supply filtering, tuning circuits, and energy storage systems. If there is significant magnetic coupling, mutual inductance must also be considered. This calculator is best suited for uncoupled or distantly placed inductors in a series configuration.

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