RLC Resonance Calculator
Calculate the resonant frequency, Q factor, and bandwidth of a series RLC circuit. Visualize the impedance curve.
Inputs
Results
Resonant Frequency
5,032.92 Hz
Q Factor
31.62
Bandwidth
159.16 Hz
How to Use This Calculator
- Enter Resistance (R), Inductance (L), and Capacitance (C).
- Review Resonant Frequency (Hz), Q Factor, and Bandwidth (Hz).
- Use Impedance at Resonance (Ω) and Lower -3dB Frequency (Hz) to inform your decision.
- Use the chart to visualize the results and explore different scenarios by adjusting inputs.
How the result changes with Inductance (L)
| Inductance (L) | Resonant Frequency | Q Factor | Bandwidth |
|---|---|---|---|
| 10 | 159.16 Hz | 1,000 | 0.16 Hz |
| 35 | 85.07 Hz | 1,870.83 | 0.05 Hz |
| 65 | 62.43 Hz | 2,549.51 | 0.02 Hz |
| 90 | 53.05 Hz | 3,000 | 0.02 Hz |
What each input means
- Resistance (R)
- Series resistance in ohms. Lower R gives higher Q factor.
- Inductance (L)
- Inductance in henrys. 10 mH = 0.01 H.
- Capacitance (C)
- Capacitance in farads. 100 nF = 0.0000001 F.
How this is calculated
Worked example, using the default values
- Identify Input ParametersResistance (R) = 10, Inductance (L) = 0.01, Capacitance (C) = 1e-7 = 3 input(s) provided
- Calculate Resonant FrequencyResonant Frequency5032.921 = 5032.921
- Calculate Q FactorQ Factor31.623 = 31.623
- Calculate BandwidthBandwidth159.155 = 159.155
- Calculate Impedance at ResonanceImpedance at Resonance10 = 10
- Calculate Lower -3dB FrequencyLower -3dB Frequency4953.973 = 4953.973
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