Parallel Inductors Calculator.

Calculate equivalent inductance for two uncoupled ideal inductors in parallel.

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Inductance 1

Inductance 2

Equivalent inductance

0.000000H

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Use Cases

Designing parallel inductor circuits

When you need to achieve a specific inductance value by combining two standard inductors in parallel, this calculator helps you find the resulting equivalent inductance quickly.

Example: If you have a 10 H and a 20 H inductor in parallel, the equivalent is about 6.67 H.

Frequently Asked Questions

How do I calculate the equivalent inductance of two parallel inductors?: For two uncoupled ideal inductors in parallel, the equivalent inductance (L_eq) is given by the reciprocal of the sum of reciprocals: 1/L_eq = 1/L1 + 1/L2. Simply enter the two inductance values in henries (H) into the calculator, and it will compute L_eq for you.
What does 'uncoupled' mean in this context?: Uncoupled means the inductors have no mutual inductance; their magnetic fields do not interact. This calculator assumes ideal inductors with no coupling, so the formula is straightforward. If inductors are coupled, the equivalent inductance depends on the coupling coefficient and the formula changes.
Can I use this calculator for inductors with different units?: The calculator expects both inductance values in henries (H). If your inductors are in millihenries (mH) or microhenries (µH), convert them to henries first (1 mH = 0.001 H, 1 µH = 0.000001 H) to get accurate results.

Tips & Common Mistakes

Tips

Ensure both inductance values are entered in henries (H) to avoid unit conversion errors.
For two equal inductors L in parallel, the equivalent is L/2, so you can quickly verify your result.
If you need a specific equivalent inductance, you can solve for one inductor value given the other and the desired total.
Remember that this calculator assumes ideal, uncoupled inductors; real inductors may have parasitic resistance and mutual coupling.

Common Mistakes to Avoid

Forgetting to convert millihenries or microhenries to henries before entering values.
Using the formula for series inductors (L_eq = L1 + L2) instead of the parallel formula.
Assuming the equivalent inductance is the average of the two values; it is actually less than the smallest inductance.

Last updated: August 13, 2026

Use Cases

Designing parallel inductor circuits

When you need to achieve a specific inductance value by combining two standard inductors in parallel, this calculator helps you find the resulting equivalent inductance quickly.

Example: If you have a 10 H and a 20 H inductor in parallel, the equivalent is about 6.67 H.

Frequently Asked Questions

How do I calculate the equivalent inductance of two parallel inductors?

For two uncoupled ideal inductors in parallel, the equivalent inductance (L_eq) is given by the reciprocal of the sum of reciprocals: 1/L_eq = 1/L1 + 1/L2. Simply enter the two inductance values in henries (H) into the calculator, and it will compute L_eq for you.

What does 'uncoupled' mean in this context?

Uncoupled means the inductors have no mutual inductance; their magnetic fields do not interact. This calculator assumes ideal inductors with no coupling, so the formula is straightforward. If inductors are coupled, the equivalent inductance depends on the coupling coefficient and the formula changes.

Can I use this calculator for inductors with different units?

The calculator expects both inductance values in henries (H). If your inductors are in millihenries (mH) or microhenries (µH), convert them to henries first (1 mH = 0.001 H, 1 µH = 0.000001 H) to get accurate results.

Tips & Common Mistakes

Tips

Ensure both inductance values are entered in henries (H) to avoid unit conversion errors.
For two equal inductors L in parallel, the equivalent is L/2, so you can quickly verify your result.
If you need a specific equivalent inductance, you can solve for one inductor value given the other and the desired total.
Remember that this calculator assumes ideal, uncoupled inductors; real inductors may have parasitic resistance and mutual coupling.

Common Mistakes to Avoid

Forgetting to convert millihenries or microhenries to henries before entering values.
Using the formula for series inductors (L_eq = L1 + L2) instead of the parallel formula.
Assuming the equivalent inductance is the average of the two values; it is actually less than the smallest inductance.

Use Cases

Designing parallel inductor circuits

When you need to achieve a specific inductance value by combining two standard inductors in parallel, this calculator helps you find the resulting equivalent inductance quickly.

Example: If you have a 10 H and a 20 H inductor in parallel, the equivalent is about 6.67 H.

Frequently Asked Questions

How do I calculate the equivalent inductance of two parallel inductors?

What does 'uncoupled' mean in this context?

Can I use this calculator for inductors with different units?

Tips & Common Mistakes

Tips

Ensure both inductance values are entered in henries (H) to avoid unit conversion errors.
For two equal inductors L in parallel, the equivalent is L/2, so you can quickly verify your result.
If you need a specific equivalent inductance, you can solve for one inductor value given the other and the desired total.
Remember that this calculator assumes ideal, uncoupled inductors; real inductors may have parasitic resistance and mutual coupling.

Common Mistakes to Avoid

Forgetting to convert millihenries or microhenries to henries before entering values.
Using the formula for series inductors (L_eq = L1 + L2) instead of the parallel formula.
Assuming the equivalent inductance is the average of the two values; it is actually less than the smallest inductance.