How does the Link Budget Calculator work?

Transmit power + antenna gain - cable loss - path loss + receive gain - noise figure = link margin Then: Path loss = 20 log10(4πd×f/c) Then: Positive margin = good signal; negative = insufficient range Then: Typical 10-20 dB margin for reliability.

Can you give an example of how to use the Link Budget Calculator?

Example: Input Tx 30dBm, path loss 100dB gives a result of -70dBm rx.

Is the Link Budget Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Link Budget Calculator?

Our Link Budget Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Link Budget Calculator

Wireless Link Budget Calculator

TX Power (dBm)

TX Antenna Gain (dBi)

Path Loss (dB)

RX Antenna Gain (dBi)

Calculates wireless link margin comparing transmit power and gains against path loss and noise. Determines link reliability and range.

Difficulty:advanced

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Did You Know?

Proper link budget analysis prevents failed wireless deployments costing tens of thousands.

References

›Link Budget Calculator

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Link Budget Calculator

Wireless Link Budget Calculator

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