When to use this calculator
Find equivalent inductance for two uncoupled parallel inductors. Assumes ideal inductors without mutual coupling.
Explore the dc circuits & components calculators for other questions in this topic. For a related calculation, use the Parallel Plate Capacitance Calculator: Estimate ideal capacitance from plate geometry and dielectric permittivity.
PUTTING IT INTO PRACTICE
Parallel Inductance: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| First inductance (mH) | 10 |
| Second inductance (mH) | 10 |
| Result | 5 mH |
- Check the input labels and enter the example values above.
- Apply the relationship: Equivalent inductance = L₁L₂/(L₁+L₂).
- The result is 5 mH, rounded for display.
How to interpret your result
Assumes ideal inductors without mutual coupling.
Ideal component models omit tolerances, heat and parasitic effects. Distinguish nominal energy from usable energy for batteries. Component ratings and installation requirements need separate manufacturer and design checks.
Frequently asked questions
Can these calculations select a safe installation rating?
No. They explain ideal relationships and do not include every thermal, protective or regulatory requirement.
When is the parallel inductance calculator useful?
Find equivalent inductance for two uncoupled parallel inductors. Assumes ideal inductors without mutual coupling.
How do I use the parallel inductance calculator?
Enter first inductance (mh), second inductance (mh). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Equivalent inductance = L₁L₂/(L₁+L₂).
What should I check before using the result?
Assumes ideal inductors without mutual coupling.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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