Inductive Reactance Calculator

Summary

Enter frequency and inductance to calculate inductive reactance (XL = 2πfL) in ohms.

How it works

1. Enter the AC signal frequency in hertz (or use the unit selector for kHz/MHz).
2. Enter the inductance value and choose the unit: H, mH, or µH.
3. The calculator applies XL = 2πfL and displays the result in ohms.
4. Phase angle is always +90° for a pure inductor — shown for reference.
5. Adjust either value and the result updates instantly.

Use cases

• Designing RF filters and selecting the right inductor value.
• Checking inductor behavior at mains frequency (50 Hz or 60 Hz).
• Estimating impedance in audio crossover networks.
• Verifying SPICE simulation results against hand calculations.
• Teaching AC circuit theory in physics or electronics courses.

Frequently Asked Questions