Cutoff Frequency Calculator

Calculate the cutoff frequency for RC, RL, and LC filters. Determine the frequency at which filter response drops by 3 dB.

Input Parameters

Resistance (R)

Capacitance (C)

Enter values and click Calculate

Cutoff frequency is the frequency at which a filter attenuates the signal by 3 dB. For RC filters, it depends on resistance and capacitance values.