Enter Values
Formula
Xl = 2πfL
If voltage is entered, ideal RMS current is I = V ÷ Xl.
Example
A 100 mH inductor at 60 Hz has approximately 37.7 Ω of inductive reactance.
How Frequency Affects Xl
Inductive reactance increases as frequency or inductance increases. An ideal inductor passes steady DC after transients settle but increasingly opposes higher-frequency AC.
Real inductors also have winding resistance, core loss, saturation, parasitic capacitance, current limits, and frequency limits.