Impedance Calculator (RL, RC, RLC)

The Impedance Calculator finds reactance, total impedance and phase angle for RL, RC and RLC circuits at a given frequency. Inductive and capacitive reactance are reported separately alongside the net value.

• RL, RC and RLC configurations
• Inductive and capacitive reactance shown separately
• Net reactance and impedance magnitude
• Phase angle in degrees
• Optional voltage input

1. Pick the circuit configuration.
2. Enter resistance, frequency and the L or C values.
3. Read reactance, impedance and phase angle.

Example: an RL circuit with R = 10 ohms and L = 100 mH at 50 Hz -> X_L = 31.416 ohms, |Z| = 32.969 ohms, phase 72.34 degrees.

• Phase angle shows how far the load sits from unity power factor
• Separate X_L and X_C make resonance easy to spot