Wireless Health Score Calculator
Score a Wi-Fi estate across coverage, SNR, channel utilisation, retries, roaming and headroom, and find the weakest dimension.
About Wireless Health Score Calculator
Each dimension is normalised to a 0–100 subscore, inverting the ones where lower is better, then combined with weights that reflect how strongly each predicts a user-visible problem. Coverage and SNR dominate because no amount of capacity tuning fixes a weak signal. Wireless complaints are subjective and intermittent, so a single weighted score with a named weakest dimension is what turns "the Wi-Fi is bad" into a specific piece of remediation work.
Formula
Wireless Health Score
score = 0.25×coverage + 0.20×SNR + 0.20×(100 − channel utilisation) + 0.15×(100 − 3×retry rate) + 0.10×roam success + 0.10×(2×headroom).
- retryS
- Retries are tripled before inversion because even 10% retries is serious
- headS
- Headroom is doubled because 50% spare capacity already scores full marks
Worked example
With the default values below, Wireless Health Score Calculator returns Wireless Health Score of 72.7. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Area meeting the RSSI targetaccepts 0–100 %
- 85 %
- Clients meeting the SNR targetaccepts 0–100 %
- 78 %
- Average channel utilisationaccepts 0–100 %
- 45 %
- Frame retry rateaccepts 0–100 %
- 12 %
- Successful roamsaccepts 0–100 %
- 92 %
- Spare capacity at peakaccepts 0–100 %
- 30 %
Results
- Wireless Health Score
- 72.7
- Rating
- C — Fair
- Weakest Dimension
- Channel utilisation — the medium is busy
- Gap to a 90-Point Target
- 17.4%
Step by step
- 1Values used
- 2Wireless Health Score
- 3Wireless Health Score= 72.7
- 4Rating= C — Fair
- 5Weakest Dimension= Channel utilisation — the medium is busy
- 6Gap to a 90-Point Target= 17.4
Assumptions and limits
- The result is derived only from the 6 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Wireless Health Score calculated?
score = 0.25×coverage + 0.20×SNR + 0.20×(100 − channel utilisation) + 0.15×(100 − 3×retry rate) + 0.10×roam success + 0.10×(2×headroom). Each dimension is normalised to a 0–100 subscore, inverting the ones where lower is better, then combined with weights that reflect how strongly each predicts a user-visible problem. Coverage and SNR dominate because no amount of capacity tuning fixes a weak signal.
Why does Wireless Health Score matter?
Wireless complaints are subjective and intermittent, so a single weighted score with a named weakest dimension is what turns "the Wi-Fi is bad" into a specific piece of remediation work.
What values do I need to enter?
This calculator takes 6 inputs: Area meeting the RSSI target, Clients meeting the SNR target, Average channel utilisation, Frame retry rate, Successful roams, Spare capacity at peak. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.