RF engineering calculator

Coax cable loss and ERP calculator

Combine transmitter power, feedline attenuation, cable length, and antenna gain to estimate power at the antenna and ERP.

Transmitter power in wattsCable length in feetCable loss in dB per 100 ftAntenna gain in dBi

Estimated effective radiated power116.1 W ERP

70.8 W reaches the antenna · 1.50 dB feedline loss · 70.8% cable efficiency