Technology & Computing
RF Free Space Path Loss (FSPL) Calculator
Calculate the free space path loss of an RF signal given frequency and distance.
Your inputs
Change any value to update the result instantly.
Free space path loss
100.0442 dB
Frequency
2,400 MHz
Distance
1 km
Distance
0.6214 mi
FSPL assumes a clear line of sight with no obstructions, reflections, or atmospheric absorption.
Formula and working
FSPL (dB) = 20×log10(distance km) + 20×log10(frequency MHz) + 32.44
- 1
Collect the inputs
Frequency (MHz) = 2,400; Distance (km) = 1
- 2
Apply the formula
FSPL (dB) = 20×log10(distance km) + 20×log10(frequency MHz) + 32.44
- 3
Result
Free space path loss = 100.0442 dB
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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