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RLC Circuit Calculator

Physics
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Analyzes circuits with resistors, inductors, and capacitors, calculating impedance and resonant frequency.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Resistance (R), Inductance (L), Capacitance (C), and Frequency (f) in the units shown.

Step 2

Read Resonant Frequency (f<sub>0</sub>), Capacitive Reactance (X<sub>C</sub>), Inductive Reactance (X<sub>L</sub>), and Impedance (Z) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Example 1

Resistance (R): 10 Ohms; Inductance (L): 0.1 Henries; Capacitance (C): 0.000001 Farads; Frequency (f): 60 Hz

Resonant Frequency (f<sub>0</sub>): 503.292121 Hz; Capacitive Reactance (X<sub>C</sub>): 2,652.582385 Ohms; Inductive Reactance (X<sub>L</sub>): 37.69911184 Ohms; Impedance (Z): 2,614.902394 Ohms

Example 2

Resistance (R): 20 Ohms; Inductance (L): 0.2 Henries; Capacitance (C): 0.0000005 Farads; Frequency (f): 50 Hz

Resonant Frequency (f<sub>0</sub>): 503.292121 Hz; Capacitive Reactance (X<sub>C</sub>): 6,366.197724 Ohms; Inductive Reactance (X<sub>L</sub>): 62.83185307 Ohms; Impedance (Z): 6,303.3976 Ohms

Resonant Circuit

Resistance (R): 100 Ohms; Inductance (L): 0.01 Henries; Capacitance (C): 0.00001 Farads; Frequency (f): 1,591.55 Hz

Resonant Frequency (f<sub>0</sub>): 503.292121 Hz; Capacitive Reactance (X<sub>C</sub>): 9.999996424 Ohms; Inductive Reactance (X<sub>L</sub>): 100.0000358 Ohms; Impedance (Z): 134.5362668 Ohms

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