When to use this calculator
Inductive reactance rises with frequency, unlike capacitive reactance.
Explore the ac power & reactance calculators for other questions in this topic. For a related calculation, use the LC Resonant Frequency Calculator: Find the ideal natural resonant frequency of an LC circuit.
PUTTING IT INTO PRACTICE
Inductive Reactance: 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 |
|---|---|
| Frequency (Hz) | 50 |
| Inductance (mH) | 100 |
| Result | 31.415927 Ω |
- Check the input labels and enter the example values above.
- Apply the relationship: Reactance = 2π × frequency × inductance in henries.
- The result is 31.415927 Ω, rounded for display.
How to interpret your result
Ideal inductive impedance has a positive imaginary sign; winding losses are excluded.
Use RMS values in the AC power relationships. Apparent power is measured in VA and real power in watts. Pure-sine conversions and balanced three-phase equations only apply under their stated assumptions.
Frequently asked questions
Why can volt-amps differ from watts?
Apparent power is the RMS voltage-current product, while real power also reflects power factor. They are numerically equal only at a power factor of one.
When is the inductive reactance calculator useful?
Inductive reactance rises with frequency, unlike capacitive reactance.
How do I use the inductive reactance calculator?
Enter frequency (hz), 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?
Reactance = 2π × frequency × inductance in henries.
What should I check before using the result?
Ideal inductive impedance has a positive imaginary sign; winding losses are excluded.
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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