High-/Low Pass Filter

The cutoff frequency (-3 dB) of a High- or low pass filter can be calculated with the formula:

fc = 1
2 π R C
fc: Cutoff frequency (Hz)
R: Resistor value (Ω)
C: Capacitor value (F)

To use the High-/ Low Pass Filter cutoff frequency calculator, enter two values to calculate the third.

High-/ Low Pass Filter cutoff frequency calculator

Capacitor µF
Resistor Ω
Cutoff frequency (-3 dB) Hz

Low Pass filter

High Pass filter