Inductive Reactance
Inductive reactance is the opposition an inductor presents to alternating current (AC). Unlike capacitive reactance, it increases with frequency. Critical for designing LC filters, RF tuning circuits, impedance matching networks, and understanding motor and transformer behavior.
Inductive reactance
XL62.83 Ω
FormulaXL = 2π × f × L
PhaseCurrent lags voltage by 90°
Formulas used
XL = 2π × f × L
How to use this calculator
Step-by-Step Instructions
- Enter the AC frequency in Hz.
- Enter the inductance in millihenrys (mH). Convert µH to mH by dividing by 1000.
- Click Calculate The inductive reactance is shown in Ohms.
Worked Example
100mH inductor at 1kHz: XL = 2π × 1000 × 0.1 = 628.32Ω