Free Space Path Loss Calculator
Calculate free space path loss (FSPL) from distance and frequency. Includes received signal power estimation.
Inputs
MHz
km
dBm
dBi
dBi
Results
Free Space Path Loss
91.52 dB
Received Power
-61.52 dBm
Received Power0 W
Wavelength0.3331 m
How to Use This Calculator
- Enter the link frequency (MHz or GHz) and path distance.
- Enter transmit power and antenna gains for both ends of the link.
- Review free-space path loss (dB) and estimated received power in dBm and watts.
- Use received power vs. your receiver sensitivity to determine link margin.
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Formula
FSPL (dB) = 20·log₁₀(d) + 20·log₁₀(f) + 32.44Related Calculators
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