Free Space Path Loss Calculator

Distance

Frequency

TX antenna gain (dBi)

RX antenna gain (dBi)

free‑space path loss — dB

received power (0 dBm Tx) — dBm

FSPL (dB) = 20·log₁₀(km) + 20·log₁₀(MHz) + 32.44.
Rx power (dBm) = Tx power (fixed 0 dBm) + TX gain + RX gain – FSPL.