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Fixed Pi and T Attenuator Calculator

This is a Javascript calculator for fixed Pi and T attenuators. Enter values for Rin, Rout, and Attenuation, then click Calculate. If unequal termination resistances are used and an attenuation value is selected that is lower than what is physically possible (a negative resistor value is displayed), then a message will appear in the box over the schematics. "k" is the linear ratio equivalent to the decibel value of the attenuator.

Equations used in this calculator can be found on the Pi and Tee Attenuators Equations page.

Calculated values do not change until the "Calculate" button is clicked.

Input Resistance: Output Resistance:

Attenuation: dB


k = (Pin/Pout)
 
 Tee Attenuator Pi Attenuator
   Ω    

Rin    

"T" attenuator schematic - RF Cafe

   Rout

Rin   

"Pi" attenuator schematic - RF Cafe  Rout

  Ω    
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