High Pass Filter Calculator

Find the cutoff frequency of an RC high-pass filter.

Cutoff frequency (Hz) 1,591.55

Formula: fc = 1 ÷ (2π·R·C)

Step-by-step with your numbers:

1. Values used:

2. Resistance = 1,000 Ω

3. Capacitance = 0.1 µF

5. Cutoff frequency = 1,591.55Hz

Did we solve your problem today?

A high-pass filter passes high frequencies and blocks low ones.

The math behind it

The cutoff is fc = 1 ÷ (2π·R·C); below it, output falls off at 20 dB per decade.

1 kΩ, 0.1 µF → about 1592 Hz.

Why block DC?

The series capacitor blocks 0 Hz, removing any DC offset.