Share & Export
Tool
propagation
fspl calculator
Calculate Free Space Path Loss (FSPL) for RF signal propagation prediction in ideal conditions.
configuration
presets:
ready to calculate
Enter parameters in the configuration panel to estimate free space path loss and signal quality.
fspl formula
FSPL (dB) = 20·log10(d) + 20·log10(f) + 32.45
Where d is distance in km and f is frequency in MHz. This formula assumes isotropic antennas and line-of-sight propagation in vacuum.
path loss guide
< 70 dBExcellent (Indoor/LOS)
70 - 90 dBGood (Short Range)
90 - 110 dBModerate (Urban Cell)
> 110 dBWeak (Cell Edge)