Capacitive Reactance Calculator
Calculate the reactance of a capacitor at a given AC frequency — its opposition to alternating current — using XC = 1 / (2π × f × C).
Formula: XC = 1 / (2π × f × C)
About Capacitive Reactance Calculator
Capacitive Reactance Calculator is a free online calculator that gives you an instant, accurate result as you type. Calculate the reactance of a capacitor at a given AC frequency — its opposition to alternating current — using XC = 1 / (2π × f × C).
The calculation uses the standard formula XC = 1 / (2π × f × C) and updates live with every change to the inputs. Everything runs client-side in your browser — fast, private, and free to use as often as you like.
Capacitive reactance falls as frequency rises — the opposite of an inductor — so capacitors block DC but pass high-frequency signals.
Frequently Asked Questions
Is Capacitive Reactance Calculator free to use?
Yes. Capacitive Reactance Calculator is completely free, with no sign-up, no downloads, and no usage limits. You can use it as many times as you like on any device with a web browser.
How accurate is this calculator?
The calculator applies the standard formula (XC = 1 / (2π × f × C)) with full floating-point precision and rounds only the displayed result. For most practical purposes the results are exact.
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