Series RLC Impedance Calculator
Enter resistance in ohms, inductance in henries, capacitance in farads, and frequency in hertz to calculate an ideal series RLC circuit.
A QUICK WALKTHROUGH
How to use this tool
- Enter finite R ≥ 0 and finite L, C, and f values greater than zero.
- Calculate the series reactances, impedance magnitude, phase, and resonance.
- Review the ideal-model limits before applying results to a real circuit.
Ideal series RLC model
The calculator uses XL = 2πfL, XC = 1/(2πfC), |Z| = hypot(R, XL−XC), phase = atan2(XL−XC, R), and f₀ = 1/(2π√(LC)).
Units and limits
Enter R in Ω, L in H, C in F, and f in Hz. Only finite values with R ≥ 0 and L, C, f > 0 are accepted; intermediate overflow is rejected.
Not circuit approval
This arithmetic models ideal sinusoidal steady state only. It excludes ratings, losses, parasitics, transients, and safety checks; it does not approve a real circuit.
GOOD TO KNOW
Common questions
Does this approve a real circuit?
No. It is an ideal steady-state calculation and does not check ratings, safety, tolerances, losses, or parasitics.
What does the phase sign mean?
Positive phase is inductive and negative phase is capacitive; the angle is reported in degrees.