Inductor Impedance Calculator

Enter the frequency and inductance to get the inductive reactance.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

An inductor opposes changes in current with inductive reactance, XL = 2πfL, where f is the AC signal frequency (Hz) and L is inductance (henries). Unlike a resistor, reactance isn't a fixed opposition — it scales directly with frequency, so the same coil behaves almost like a short circuit at DC (f = 0) and like an open circuit at very high frequencies.

This frequency-dependent behavior is why inductors are used in filters (blocking high frequencies while passing low ones), chokes, and impedance-matching networks. Electronics engineers calculate XL when designing filter cutoff points or predicting how a circuit's impedance shifts across a frequency range.

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