Calculators » RF and Microwave » Pi Filter Calculator (LPF): LC Low Pass Filter Design

Pi Filter Calculator (LPF): LC Low Pass Filter Design

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This Pi filter calculator functions as an LC low pass filter, primarily used for impedance matching. It determines the appropriate inductance (L) and capacitance (C) values based on the input cutoff frequency (fc) and impedance (Z0).

Pi LPF Calculator

Inputs

Outputs

This is a simple calculator to help you design an LC-based Pi filter for low pass filtering applications.

Example:

  • INPUTS: Fc = 900 MHz, Z0 = 50 Ohm
  • OUTPUTS: L = 1.76 x 10-8 Henries, C = 7.077 x 10-12 farads

Pi Low Pass Filter

Pi Low Pass Filter Formula

The following equations are used in this Pi filter calculator:

Pi LPF LC calculator formula