Link Budget & Propagation
Free Space Path Loss Calculator
Calculate the loss between two antennas in free space from the distance, frequency and antenna gains.
Result
Enter the inputs above and select Calculate.
Formula: FSPL(dB) = 20 · log₁₀(d_km) + 20 · log₁₀(f_MHz) + 32.44 − G_Tx − G_Rx
The 32.44 constant is for kilometres and megahertz. Set both gains to 0 for the loss between isotropic antennas.