Link Budget Calculator
Calculate end-to-end RF link budget from transmitter to receiver, including EIRP, path loss, and link margin.
Inputs
dBm
dB
dBi
MHz
km
dBi
dB
dBm
dB
Results
EIRP
38 dBm
Received Power
-71.02 dBm
Link Margin
13.98 dB
Free Space Path Loss114.02 dB
Total Path Loss117.02 dB
Link Viable1
Total Antenna Gain20 dBi
Total System Losses7 dB
How to Use This Calculator
- Enter transmit power (dBm), cable/connector losses (dB), and transmit antenna gain (dBi).
- Set frequency (MHz) and distance for free-space path loss calculation.
- Enter receive antenna gain (dBi), receive cable loss (dB), and receiver sensitivity (dBm).
- Review EIRP, FSPL, total path loss, received power, and link margin.
- Link margin should exceed 10-20 dB to account for fading, rain, and interference.
Ad Placeholder
Formula
Rx Power = Tx Power - Tx Loss + Tx Gain - FSPL - Addl Loss + Rx Gain - Rx LossRelated Calculators
Free Space Path Loss Calculator
Calculate free space path loss (FSPL) from distance and frequency. Includes received signal power estimation.
EIRP Calculator
Calculate Effective Isotropic Radiated Power from transmit power, cable loss, connector loss, and antenna gain.
Antenna Gain Calculator
Calculate antenna gain in dBi from aperture dimensions, frequency, and efficiency. Includes beamwidth and effective aperture area.
Coaxial Cable Loss Calculator
Calculate signal attenuation from cable type, length, frequency, and connectors. Compare loss across common coax cable types.
Ad Placeholder