RLC Impedance Calculator
Calculate |Z|, XL, and XC for series RLC
How to Use This Calculator
1
Enter R, L, C, and f
Provide R (Ω), L in mH, C in nF, and frequency in Hz.
2
Calculate
Click Calculate to compute reactances and impedance magnitude.
3
Interpret |Z|
At resonance, XL ≈ XC and |Z| ≈ R. Below resonance, circuit is capacitive; above, inductive.
Formula
XL = ωL, XC = 1/(ωC), |Z| = √(R² + (XL − XC)²)
Where ω = 2πf (rad/s).
About RLC Impedance
The impedance of a series RLC varies with frequency due to the opposing effects of inductive and capacitive reactance.
Frequently Asked Questions
Does this handle parallel RLC?
This version targets series RLC impedance magnitude. Parallel networks require a different formula.
What units should I use?
Enter L in mH and C in nF; the tool converts to SI units automatically.