This is the capacitive reactance calculator – a great tool that helps you estimate the so-called resistance of a capacitor in an electric circuit. You can find the capacitive reactance formula in the text below, and we explain why the reactance occurs for alternating current but not direct current. If you want to know how to calculate the capacitive reactance, you’re at the right place.

This calculator is designed to compute for a capacitor’s reactance and admittance given the capacitance value and the frequency. It can be also used the other way around, i.e., give the reactance value and it will give the capacitance. Note that the input capacitance must be in picofarads (pF) while the input frequency can be in Gigahertz (GHz) or Megahertz (MHz).

Diagram:

Formula:

Where
XC = Capacitive reactance in ohms
F = Frequency in hertz
C= Capacitance in farads

“Capacitive reactance equals to reciprocal of 6.28 product of frequency (which is indicated as F) in hertz and capacitance”

Example:

Let’s consider capacitance C as 25 picofarad and frequency F as 50 megahertz.
Let’s apply formula