Passive Filter Calculator

A filter is a circuit that is designed to pass signals with desired frequencies and reject or attenuate others. Given the value of the resistor and capacitor, our tool calculates the cut-off frequency of a series RC passive filter.

Low Pass Filter

A Low Pass Filter only allows low frequency signals from 0Hz to its cut-off frequency, ƒc point to pass while blocking those any higher.

Please enter your values below.

Formulas

fc = 1/2𝜋RCθ = −arctan(2𝜋fRC)

Diagram View

Low Pass Filter