Link Budget Calculator


This tool will help you determine whether a wireless data-link is possible between two sites.
The achievable data-rate will be determined by the distance between the sites and the devices you choose to make the link.
For reliable operation you will need a clear line-of-sight.

 
       
 
Link
Distance
Frequency

Transmitter

 
dBm
 
dBi
 
m
 
 

Receiver

-dB
 
dBi
 
m
 
 
 
Variables Description Value Unit
Fresnal Zone Clearance The minimum antenna height required above highest obstacle 0.85 metres
Transmitter Cable and Connector Losses 0.31 dB
E.I.R.P. The amount of radio power emitted (Equivalent Isotropically Radiated Power) 27.69 dBm
Free Space Path Loss The loss of radio power emitted through free air 80.0 dB
Receiver Cable and Connector Losses 0.31 dB
Received Signal -44.62 dB
System Operating Margin A minimum of 10dB System Operating Margin is recommended for a stable link 35.38 dB

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