RF link budget worksheet calculator

Calculate received power with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use received power to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Transmit power (dBm)
20
Transmit antenna gain (dBi)
5
Receive antenna gain (dBi)
5
Path loss (dB)
100
Total cable and other losses (dB)
3
Received power (dBm)
-73

Try another scenario

Transmit power (dBm)
22
Transmit antenna gain (dBi)
5
Receive antenna gain (dBi)
5
Path loss (dB)
100
Total cable and other losses (dB)
3
Received power (dBm)
-71
Calculation method

Calculation method

Received power (dBm)

Transmit power + both gains − path loss − other losses.

Symbols and units
a
Transmit power (dBm)
b
Transmit antenna gain (dBi)
c
Receive antenna gain (dBi)
d
Path loss (dB)
e
Total cable and other losses (dB)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Transmit power, gains, path and cable losses. Returns Received-power estimate. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Transmit power (dBm): minimum None, maximum 1000000000000.0. Transmit antenna gain (dBi): minimum None, maximum 1000000000000.0. Receive antenna gain (dBi): minimum None, maximum 1000000000000.0. Path loss (dB): minimum 0, maximum 1000000000000.0. Total cable and other losses (dB): minimum 0, maximum 1000000000000.0.
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Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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