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Pi Attenuator Calculator

A-INFO's Pi Attenuator Calculator (aka Pi pad attenuator) allows you to determine the Resistor values (R1 & R2) for a Pi attenuator (measured in Ohms).

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Attenuation (dB):
Impedance (Ω):

Result:

R1:
R2:

The Pi attenuator (Pi pad) is a specific type of attenuator circuit which resembles the shape of the Greek letter "Π" (Pi). The Pi attenuator consists of one series resistor and two parallel shunt resistors to ground at the input and the output.

Visit A-INFO's RF coaxial attenuators page for product details.

Prefix Symbol Value
Tera 'T' 1012
Giga 'G' 109
Mega 'M' 106
kilo 'k' 103
Prefix Symbol Value
pico 'p' 10-12
nano 'n' 10-9
micro 'u' 10-6
milli 'm' 10-3