Domain Authority Estimator
Estimate a 0–100 authority score from numbers you enter, with the full formula shown — free, fast and private.
Estimate only, based on the numbers you enter. This is NOT Moz/Ahrefs Domain Authority — real DA needs their live index/API.
How to use Domain Authority Estimator
- Enter the domain age in years and the backlink, referring-domain and monthly-traffic counts you know.
- Click Calculate Estimate to see the 0–100 score and the points from each factor.
- Compare sites by entering their numbers the same way — the same formula is used every time.
Formula (shown in full): Age = min(years, 10) × 2 (max 20). Backlinks = min(25, 5 × log10(1 + backlinks)). Referring domains = min(25, 5 × log10(1 + referring domains)). Traffic = min(30, 6 × log10(1 + monthly visitors)). Total = the four parts added, capped at 100. Logarithmic scales mean early growth counts more than later growth. This tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
Is this the same as Moz or Ahrefs Domain Authority?
No. This is an estimate only, based on the numbers you enter and a formula shown on the page. Real Moz or Ahrefs Domain Authority needs their live link index and API.
How is the estimate calculated?
Age gives up to 20 points, backlinks up to 25, referring domains up to 25 and monthly traffic up to 30, for a total of 0 to 100. Each part uses a logarithmic scale, so going from 10 to 100 links matters more than going from 10,000 to 10,100.
What numbers should I enter?
Enter the domain age in years and the backlink, referring-domain and monthly-traffic counts you know from your own analytics or SEO tool. The estimate is only as good as the numbers you enter.
Is my data uploaded anywhere?
No. The calculation runs in your browser and nothing you enter is uploaded to a server.