Friis Transmission Equation Calculator
The Friis transmission equation, as shown below, gives the ratio of received to transmitted power for given antenna gains, range and wavelength under ideal conditions. The calculator below uses this equation to calculate any one of the variables, provided all the other variables are known.
Enter the known values in any one of the available units, then click on the Calculate button next to the value you wish to calculate.
Whilst I try to keep the information on this site accurate, I'm only human and I do occasionally make mistakes. I therefore advise you to check any information before using it for anything important. If you do find any errors, please let me know so that I can correct them.
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This page was last changed on: 02 August 2021.
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