Skip to main content
All CollectionsSite AuditTerminology
What is Health Score and how is it calculated in Ahrefs Site Audit?
What is Health Score and how is it calculated in Ahrefs Site Audit?

Find out how is Health Score calculated within Site Audit

May avatar
Written by May
Updated over a week ago

Health Score reflects the proportion of internal URLs crawled by Site Audit that don't have errors.

The ranges for the health score ratings are:

  • Weak: 0-30

  • Fair: 31-70

  • Good: 71-90

  • Excellent: 91-100

To understand Health Score, it would be important to understand what issues are. 

What are Issues?

Issues are a set of rules or filters which you can apply to all crawled pages for a complete audit of your site.

Site Audit scans your website for 170+ pre-defined technical and on-page SEO issues.

Based on their level of importance, issues are divided into:

  • Errors (red) - The most important and need to be fixed as soon as possible.

  • Warnings (yellow) - Not as critical, but still require a fix.

  • Notices (blue) - Work as a nudge. Fix them after errors and warnings.

Site Audit: Overview - 5

💡 An in depth guide for using Site Audit can be found on our Academy

How is Health Score calculated?

To calculate this score, we take the number of internal URLs without error issues, divide it by the total number of internal URLs and multiply it by 100 to get a percentage.

Only "Error" (red) issues lower health score. Warning (yellow) and Notice (blue) issues are not as severe, and thus do not affect Site Audit health score at all.

Example 1: Site A has 10 pages crawled while 2 out of these 10 pages have errors. Thus, Health Score = ((10-2)/10)*100 = 80%

Example 2: Site B has 100 pages crawled but 80 of these 100 pages have errors. Thus, Health Score = (100-80)/100) *100 = 20%

This also means that while Site A has less pages crawled compared to Site B, due to the fact that the proportion of errors is lower for Site A, its Health Score is higher.

Note: You can ignore certain Site Audit issues by clicking on "Turn off for this project" in the 3-dot menu for that specific issue.

Did this answer your question?