High Pass Filter Calculator

Your details

RC and RL filters give a 20 dB/decade slope; LC gives 40 dB/decade.
Pick which quantity you want the calculator to find.
Resistor value in the unit selected below.
Prefix for the resistance value.
Capacitor value in the unit selected below.
Prefix for the capacitance value.
Inductor value in the unit selected below.
Prefix for the inductance value.
An optional spot frequency at which to compute gain (dB) and phase shift.
Hz
Cutoff frequency (-3 dB)
1.592 kHz

The frequency at which output power falls to half (-3 dB) of the passband level.

Cutoff frequency (Hz)1,591.5494Hz
Roll-off slope+20 dB/decade (1st order)
Phase shift at fc+45.0 deg
Gain at fc-3.01 dB
Gain at evaluation frequency-0.42 dB
Time constant (RC/RL)100.0 µs
1,591.5494 Hz
Infrasonic (< 20 Hz)<20Bass / low audio20-300Voice / mid audio300-3400High audio (up to 20 kHz)3400+

First-order high-pass filter with a 1.592 kHz cutoff.

  • Your filter passes signals above 1.592 kHz and attenuates everything below at 20 dB/decade.
  • At the cutoff frequency the filter introduces a 45 degree phase lead and -3 dB gain.
  • The RC time constant is 100.0 µs, which is 1/(2pi x fc).
  • At 5.000 kHz the gain is -0.42 dB.

Next stepTo steepen the roll-off further, cascade two identical stages (2nd order) or choose an LC topology for 40 dB/decade.

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