dBm dBi Calculator

This tool uses the

  • Power at the output of a transmitter (dBm)
  • Cable loss (dB) and
  • Antenna gain (dBi)

to calculate the EIRP (Effective Isotropic Radiated Power).

arrow dBi to dBm


EIRP = PTx – LC + GAnt

Use the Antenna Factor and Frequency of operation to calculate the Antenna Gain in dBi.