Range calculator
UHF radio mostly travels in a straight line. See how far two antennas can see each other at a given height.
Line-of-sight range
15.3 miles
Antenna A sees 12.3 mi and antenna B sees 3.0 mi to their horizons.
Signal loss over open air
114 dB
Free-space loss at the full distance. Real paths lose more to hills, trees and buildings.
This is a rough estimate on flat ground. Hills, buildings, trees, coax loss and power change what you get in real life.