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

Antenna Factor to Gain Calculator

**Formula**

**AF = 20*Log _{10}(9.73/(λ√G))**

where,

**λ = c/f**

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

**How to use the Calculator**

Enter

- 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**.