Free Space Path Loss
Estimate ideal line-of-sight RF spreading loss from distance and frequency. Optional gains, power, and losses turn the result into a compact one-way link budget.
Free-space path loss
92.45 dB
1.000 km at 1,000.00 MHz
Wavelength
0.2998 m
1.0000 GHz
Received power
-62.45 dBm
5.691e-10 W
Distance and frequency determine free-space spreading loss
Range sensitivity
20 dB per 10x distance
Open Source and Easy to Use Elsewhere
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
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