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 and URLs that return 4xx/5xx (e.g. a 404 page listed in the sitemap or linked from the site). Redirects, images, URLs that hit the rate limit or bot protection, URLs that did not respond and URLs that could not be confirmed at the end of the crawl are not in the denominator.
• 4xx/5xx URLs: 404, 410 and 5xx carry an “Error” finding, so they count as faulty pages; 401/403/405 (access restricted) are a “Warning”, so they count as pages with warnings.
• 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.

#Critical site errors

Even when the pages are fine one by one, some site-wide errors keep the whole site out of Google. If one of them is present, the score is at most 49(a score that is already lower does not change):

• robots.txt blocks the whole site for Googlebot, or returns 5xx in both attempts.
• The home page is blocked from indexing (noindex), or at least 80% of the crawled pages are noindex.
• The canonical of at least half of the indexable pages points to one single address or to another domain.

A critical finding marked as an intentional choice does not cap the score.

#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.