Antenna Gain Calculator

Efficiency (η):
Wave Length (λ):
Physical Aperture Area (A):
Antenna Gain:

Antenna Gain Formula

GdBi = 10 LOG10 ( η4πA / λ2)

Where λ = Wave Length, η = Efficiency, A = Physical Aperture Area

In electromagnetics, The antenna gain is very useful, it combines the antenna's directivity and electrical efficiency. To a receiving antenna, the gain means how well the antenna converts radio waves, To a transmitting antenna, it means how well the antenna converts input power into radio waves. provides you helpful and handy calculator resources.