How we calculate your SEO score
106 checks across 11 categories. Every score is weighted, every finding is explained, and every fix is specific to your site. No black box, ever.
The Formula
Your overall score is a weighted sum of 11 category scores
OverallScore = Σ ( CategoryScore × CategoryWeight )
Each category is scored 0–100 independently. Categories that matter more to search engines carry more weight.
Category Weights
What we measure and how much it matters
18%
Crawlability
10 checks
Can search engines find and access all your pages?
18%
On-Page
10 checks
Are your page titles, descriptions, and headings set up correctly?
15%
Performance
9 checks
How fast does your site load and respond to visitors?
14%
Content
5 checks
Is there enough quality content for search engines to understand your pages?
8%
Mobile
4 checks
Does your site work well on phones and tablets?
7%
Security
3 checks
Is your site served securely over HTTPS with proper headers?
5%
Structured Data
5 checks
Does your site include schema markup for rich search results?
5%
AI Optimisation
11 checks
Can AI search engines and LLM crawlers find and cite your content?
4%
Link Health
3 checks
Are your internal and external links working correctly?
3%
Internationalisation
2 checks
Are language declarations and regional targeting set up correctly?
3%
Accessibility
3 checks
Are images labelled, forms accessible, and heading structure correct?
Severity
Not all issues carry the same weight
A critical issue deducts 4× more than a low one. Severity multiplies every penalty — so a single site-wide critical finding can strip dozens of points from an otherwise healthy score.
Severity deduction multiplier
Page Coverage
An issue on 1 of 50 pages deducts 1/50th of the rule's weight. The same issue on all 50 pages deducts the full amount. Site-wide problems hurt far more than isolated ones.
Severity Multiplier
A critical issue deducts 4× more than a low-severity one. Critical findings actively prevent indexing. Low-severity findings are best-practice improvements.
Example
See the score calculated step by step
This category has 10 rules.
Total deduction: 1.00 + 0.50 + 0.10 = 1.60
Category score = ( 10 − 1.60 ) / 10 × 100 = 84.0
Contribution to overall = 84.0 × 0.18 = 15.1 pts
106 Checks
What we check on your website
Score Tiers
What your score means
Critical
0 – 29
Serious issues are blocking search engines from indexing your site. Immediate action is needed.
Poor
30 – 49
Significant gaps across multiple categories. Your site is losing traffic to competitors with better foundations.
Needs Work
50 – 69
The foundation is there but targeted fixes would materially improve your visibility. Focus on the quick wins.
Good
70 – 89
Strong baseline with room for refinement. Addressing the remaining issues would give you a competitive edge.
Excellent
90 – 100
Best in class. Your site follows current best practices across all major categories. Maintain and monitor.
Methodology
Built on published industry standards
Our rules are based on published guidelines from Google Search Central, web.dev Core Web Vitals, schema.org, and the llmstxt.org specification. We update our methodology as requirements evolve.
Standards
Each check is backed by published guidelines
Our scoring rules are derived from authoritative specifications. Click any category to view the relevant guidance.
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Methodology v2.1 · 65 rules · Last updated March 2026