Engineering References → Calculators → Free Space Path Loss Calculator
Free Space Path Loss Calculator
Free space path loss in dB from frequency and distance, between two isotropic antennas. Distance in metres, kilometres, feet, or miles.
Free Space Path Loss
Signal attenuation between two isotropic antennas in free space.
Free Space Path Loss (dB)
Frequency
Frequency Unit
Distance
Distance Unit
Free Space Path Loss (dB)
—
FSPL = 20·log₁₀(d) + 20·log₁₀(f) − 147.55 | d in metres, f in Hz
More RF calculators
- Wavelength, VSWR & Power Density Calculator
- EIRP / ERP / Field Strength Converter
- Field Strength Unit Converter
- VSWR / Return Loss / Reflection Coefficient Calculator
- Skin Depth Calculator
- Noise Figure / Noise Temperature Converter
- RF Link Budget Calculator
- Coaxial Cable Loss Calculator
- All calculators on one page
Need Help Interpreting Results?
CTS provides EMC testing and compliance consulting. Contact us to discuss your product's test results and certification requirements.
Contact CTS →