# 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 |