Health score

How the score is calculated.

The health score shows, on a scale of 0–100, how many of the site's pages are free of problems: a page with an error counts as fully lost, a page with only warnings loses a little.

#Formula

Score = (pages with no error finding − pages with only warnings × 0.15) ÷ pages evaluated × 100, rounded to the nearest whole number.

• Pages evaluated: HTML pages that return a 200 status code. Redirects, 4xx/5xx URLs, images and pages that hit the rate limit are not in the denominator.
• Faulty page: a page with at least one “Error”-level finding; it adds nothing to the score (a whole page lost).
• Page with warnings: no “Error” finding but at least one “Warning”; it lowers the score by 15% of a page (it counts as 0.85 of a page). The number of warnings on the page does not matter.
• Clean page: only “Info”-level findings or none at all; full marks. Info-level findings never lower the score.
• Findings marked as an intentional choice are not counted.
• If there are no HTML pages to evaluate, “—” is shown instead of a score.

Example: if 23 of 24 pages have only warnings and none has an error, the score is (24 − 23 × 0.15) ÷ 24 = 86; had one of them had an error, that page would count as fully lost.

#Menu and template errors

A single broken link in the menu repeats on hundreds of pages. Counting that as hundreds of errors would lower the score more than reality justifies; so a broken link target coming from a template affects the score as much as a single faulty page. Details: Menu / template detection.

#Overall status label

In the Overview, next to the score, the increase or decrease from the previous crawl is shown.