Inductive Reactance (X_L = 2πfL)
Enter your known values, leave one input blank, and solves for the missing one. Try different units for next level excitement!
Learning zone
An inductor fights change in current, and the faster the AC wiggles, the harder it fights: reactance climbs linearly with frequency. A 10 mH coil offers just 3.8 Ω at mains 60 Hz but 628 Ω at 10 kHz. That frequency preference makes inductors natural low-pass filters — the reason a loudspeaker crossover puts an inductor in series with the woofer, waving bass through while blocking treble.
Inductive Reactance (X_L = 2πfL)
Where
- = Inductive reactance
- = Frequency
- = Inductance
Missing one of these? Work it out first, then come back
- Inductive reactance — Series RLC Impedance, Capacitive Reactance (X_C = 1/2πfC)
- Frequency — Capacitive Reactance (X_C = 1/2πfC), Wave Speed (v = fλ)
- Inductance — Energy Stored in an Inductor, RL Time Constant (τ = L/R)