Path loss & link budget
Ideal free-space loss and estimated received power.
Free-space path loss--
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Free-Space Path Loss and Link Budget Calculator
Estimate free-space path loss and ideal received power for a radio link.
About this calculator
How to use it
Enter frequency, path distance, transmitter power, combined antenna gain and other system losses.
Understanding the result
This is an unobstructed-path estimate. Terrain, clutter, diffraction, polarisation and Fresnel-zone obstruction can greatly change a real link.
More ham radio calculators
Use this calculator as a practical starting point. Check critical radio, electrical and installation work with suitable test equipment and current licence requirements.