Inductive Reactance Calculator and Tutorial

Inductive reactance is the inductor equivalent to the resistance of a resistor. Unlike a resistor, a inductor's reactance is directly proportional to frequency. An inductor exhibits zero reactance to a DC (0 Hertz) signal. As frequency goes up, the inductive reactance will goes up. At very high frequencies the capacitive reactance of circuit approaches infinity. For this reason, inductors are shorts to DC signals and open circuits to high frequencies. .

The formula for calculating capacitive reactance is:

Equation 1: Xl = 2*PI*F*L

where

Xl is the inductove reactance in Ohms
PI is the constant 3.14
F is the frequency in Hertz
L is the value of the inductance in Henries

Inductance Reactance Calculator

You can see how the inductive eactance changes with frequency and capacitance using the inductance reactance calculator below. Enter in the inductance in uH (microHenires) and the frequency in Hertz. If you enter in 0 for the frequency the calculator calculates an answer of 0. If you want to change the frequency easily, after you enter a number in the frequency box, simply hold down the up or down arrow keys on your keyboard.

What you will notice with this calculator, is that the inductive reactance is relatively low for low frequencies and low values of inductances. In order to increase the inductive reactance substancially, you will need a frequency in the megahertz region or an inductor that is in the range of of millihenries.

Inductance Reactance Calculator

Inductance (uH)
Frequency (Hz)   
Inductive Reactance Ohms :