RLC Impedance Calculator

Enter R, L, C, and frequency to inspect a simple ideal series RLC circuit.

R (Ω)

L (mH)

C (µF)

Frequency (Hz)

—Series impedance magnitude |Z|

—XL

—XC

—Phase angle

—Ideal resonance

Educational / low-voltage electronics calculator. Real components have tolerances and non-ideal behavior. Do not use this page as a substitute for qualified design or safety guidance for mains/high-energy electrical systems.

How to use this RLC Impedance Calculator

Calculate series RLC impedance magnitude, reactance, phase, and ideal resonance. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.