Free Space Loss Calculator

The Free Space Loss is the transmission loss between two antennas, separated by a distance. Enter the operating frequency in MHz (2400 for 2.4 GHz, 5800 for 5.8 GHz, etc.) and the distance between the two attennas in miles. All fields marked with an asterisk (*) are required.

Note: The final value represents a first order approximation and should only be used as a guide. No guarantees or warranties are implied accordingly.

Free Space Loss (FSL) = 20Log₁₀(MHz) + 20Log₁₀(Distance in Miles) + 36.6