Inductive Reactance Calculator
Find the reactance of an inductor in an AC circuit.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
Inductive reactance is the opposition an inductor presents to alternating current: Xₗ = 2πfL, where f is the AC frequency (Hz) and L is inductance (henries). Unlike resistance, reactance is frequency-dependent and doesn't dissipate energy as heat — it stores and releases it in the inductor's magnetic field, causing current to lag voltage by 90° in a purely inductive circuit.
Electrical engineers and electricians use inductive reactance to design AC circuits involving transformers, motors, chokes, and filters — for example, calculating how much an inductor will impede current at 60 Hz mains frequency versus at radio frequencies, or sizing components in crossover networks for speakers. Enter the frequency and inductance to find Xₗ.
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