Antenna Factor Calculator

This tool calculates the Antenna Factor (AF) from the Antenna Gain (G) and Frequency of operation (f).

Antenna Factor to Gain Calculator


AF = 20*Log10(9.73/(λ√G))


λ = c/f

c is the speed of light, f is the operating frequency and λ is the wavelength.

How to use the Calculator


  • Antenna gain in dBi – this is typically provided by manufacturers in the data-sheet
  • Frequency of operation (in MHz)

An example calculation: for a gain of 8 dBi and frequency of 915 MHz, the Antenna Factor is 21.50 dB/m.