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RC high-pass filter calculator

Calculate RC high-pass cutoff frequency, gain and phase, with an interactive frequency-response chart.

Configure

F

Capacitance

Ω

Resistance

Hz

Inspect the response at this frequency
Advanced inputs

V

AC source amplitude

Results update as you type.

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Results

Cutoff frequency1.59 kHz
Frequency response
Gain (dB)-80-40015.92 Hz1.59 kHz159.15 kHzPhase shift-90°0°90°
Voltage gain0.53 V/V
Phase shift57.86°
Output amplitude532.02 mV
Advanced results
Time constant100 µs
Gain-5.48 dB
Input current amplitude532.02 µA

How rc high-pass filter works

A series capacitor and a resistor to ground attenuate low frequencies. Measure the output across the resistor. At the cutoff frequency the voltage gain is 1/√2 and the phase lead is 45°.

fc=12πRCf_c=\frac{1}{2\pi RC}

Ideal parts, ideal source and unloaded output. The circuit attenuates low frequencies at 20 dB per decade.

Change the form inputs or click a component value on the schematic. Choose Try in CircuitSim to simulate the configured circuit.