Domain Authority Checker (DA / PA / DR)

The Domain Authority Checker aggregates links to multiple free authority-checking services so you can compare metrics across platforms.

Understanding authority metrics

• Moz DA (1–100): Logarithmic — 50 → 60 is much harder than 20 → 30. Predicts overall domain ranking strength.
• Moz PA (1–100): Same scale but for individual page authority.
• Ahrefs DR (1–100): Based on the quality and quantity of backlinks. Different model from Moz but similar concept.
• Majestic TF (0–100): Trust Flow — weighted toward backlink quality from trusted seeds.
• SEMrush AS (1–100): Composite of authority + traffic + organic ranking quality.

Important caveat

These are third-party metrics — Google does not use any of them directly. They are useful proxies for competitive analysis but not direct ranking factors. The only "authority" Google uses internally is PageRank (no longer publicly exposed).