Antenna Gain Calculator
Calculate antenna gain in dBi from antenna factor in dB/m and frequency in MHz. The relationship assumes a measurement system matched to 50 ohms.
Result will appear here
Formula: G(dBi) = 20 log10(f/MHz) − AF(dB/m) − 29.8
Where: f = MHz; AF = dB/m
The 29.8 dB constant follows from using MHz, dB/m and a matched 50-ohm measurement system.
The calculator converts a calibrated antenna factor to antenna gain. Use the antenna factor specified for the entered frequency and verify the calibration reference impedance.
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Last updated on September 24, 2026
Author: IBL-Editors Team
Technical Review: Andreas Bender - Deputy Managing Director | IBL-Lab GmbH Give feedback on this article
Author: IBL-Editors Team
Technical Review: Andreas Bender - Deputy Managing Director | IBL-Lab GmbH Give feedback on this article