Filter Cutoff Frequency Calculator
Find the -3dB cutoff frequency for low-pass and high-pass filters.
CALCULATE
--
Formulas
fc = 1 / (2πRC)RC filter cutoff
fc = R / (2πL)RL filter cutoff
Filter Cutoff Frequency
The cutoff frequency is where the output signal is attenuated by 3dB (about 70.7% of input). Below cutoff: signal passes (low-pass). Above cutoff: signal is attenuated. Used in audio, RF, and power supply design.
Ad (728x90)