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ENGINEERING · WIRELESS

Wi-Fi Link Budget Calculator

Calculate free-space path loss, received signal level and link margin for a point-to-point wireless link from radio, antenna and distance inputs.

Radio and path
Used only when Custom is selected.
Transmit side
Radio output power in dBm.
Receive side and margin
Enter the total additional path loss.
Minimum received level for the selected modulation/data rate, from the radio specification.
Engineering margin for fading and environmental variation.
Read: Wi-Fi Fundamentals →Wi-Fi Channel Planner →

Engineering assumptions

The calculator uses the free-space path-loss model only: FSPL = 32.44 + 20 log10(frequency in MHz) + 20 log10(distance in km). It does not model walls, foliage, reflections, Fresnel clearance, multipath, antenna pattern, regulatory EIRP limits or client-specific transmit power. For normal enterprise WLANs, use it as a link-budget learning and design aid rather than a substitute for a predictive or physical site survey.