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Free-Space Path Loss Calculator — result sheet
Calculate ideal free-space radio path loss from frequency and distance.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: FSPL dB=32.44+20log10(distance km)+20log10(frequency MHz).
The result is the ideal line-of-sight free-space term and is not a coverage, safety, or regulatory prediction.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Frequency — minimum 1.0E-6; maximum 1000000000
- Distance — minimum 1.0E-6; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Frequency | 2400 |
| Distance | 1 |
FSPL ≈100.04 dB.
Assumptions and limits
- Frequency is in MHz and distance in kilometres.
- The path is unobstructed free space with far-field propagation.
- Antenna gain, polarization, terrain, atmosphere, multipath, cable loss, and regulations are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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