Engineering calculator

Free-Space Path Loss Calculator

Calculate the ideal free-space path loss (FSPL) and ideal received power from frequency and transmitter-receiver distance in a radio link.

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Source / method note

This calculation assumes an ideal free-space line-of-sight (FSPL); it does not include factors like buildings, terrain, or rain.

Legal / official rate note

Real-world RF coverage varies depending on environmental factors such as multipath propagation and fading.

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