Free Space Path Loss Calculator

The signal strength that is lost as a signal moves through empty space is known as the free space path loss. Typically, its value is determined by discounting any potential impediments or reflections in its path. The loss between two isotropic radiators in free space, as stated as a power ratio, according to IEEE standards. To determine the Free Space Path Loss, enter the Frequency, Distance, and System Gains. It's measured in dB.

Enter Distance, Frequency, Transmitter Antenna Gain and Receiver Antenna Gain

  • dB
  • dB


  • Free Space Path Loss
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FSPL = Free Space Path Loss

d = Distance between the Antennas

f = Frequency

G (Tx) = The Gain of the Transmitting Antenna

G (Rx) = The Gain of the Receiving Antenna

C = Speed of Light in Vacuum (Meters per Second)