Calculator
Example data table
| R (Ω) | L (mH) | C (µF) | f (Hz) | |Z| (Ω) | Phase (deg) | Behavior |
|---|---|---|---|---|---|---|
| 20 | 50 | 0.47 | 1000 | ~326 | ~86 | Inductive |
| 50 | 10 | 0.10 | 5000 | ~314 | ~80 | Inductive |
| 10 | 2 | 1.00 | 200 | ~8.9 | ~-48 | Capacitive |
Values are approximate and depend on exact inputs.
Formula used
- Angular frequency: ω = 2πf
- Inductive reactance: XL = ωL
- Capacitive reactance: XC = 1/(ωC)
- Net reactance: X = XL − XC
- Series impedance: Z = R + jX
- Magnitude: |Z| = √(R² + X²)
- Phase: φ = atan2(X, R)
- Resonance: ω0 = 1/√(LC), f0 = ω0/(2π)
- Quality factor (series): Q = ω0L/R
- Bandwidth (approx): Δf = R/(2πL)
- With RMS voltage: I = V/|Z|, P = VIcosφ, Q = VIsinφ, S = VI
How to use this calculator
- Enter R, L, and C using your preferred units.
- Select Frequency mode or Angular frequency mode.
- Provide the operating frequency (or ω) for analysis.
- Enable the voltage option for power and drop values.
- Press Calculate to display results above the form.
- Use Download CSV or Download PDF for reporting.