Walk into any SEO conversation and you’ll hear a dozen metrics thrown around — DA, PA, TF, CF, DR, UR, Authority Score. Each tool vendor pushes their own score as the definitive measure of a link’s value. After analysing over 50,000 backlinks across 400+ client campaigns, we’ve arrived at a clear conclusion: Ahrefs Domain Rating (DR) is the only metric that correlates reliably with ranking outcomes.

What Is Ahrefs DR, Exactly?

Domain Rating measures the strength of a website’s backlink profile on a logarithmic scale from 0 to 100. The key word is logarithmic — going from DR 50 to DR 60 requires substantially more link equity than going from DR 10 to DR 20. DR is calculated based on the number of unique referring domains and the DR of those linking domains, recursively weighted. Crucially, it measures only backlink profile strength — not content quality, traffic, or on-page factors. That purity is what makes it useful.

Why Not Moz DA?

Moz Domain Authority was the dominant metric for years, but its methodology has significant weaknesses. DA is heavily influenced by the quantity of links in Moz’s index, which is notably smaller than Ahrefs’ crawler. Sites can inflate their DA through link schemes that Moz doesn’t identify as spam. In our testing, DA showed a consistently weaker correlation with Google rankings than DR across every niche we studied.

Why Not Majestic Trust Flow?

Trust Flow attempts to measure topical relevance of backlinks, not just volume — which is theoretically valuable. In practice, Majestic’s index is smaller and less frequently updated, meaning Trust Flow often lags weeks behind actual link profiles. For prospecting it can be a useful secondary signal, but as a primary purchasing decision it’s unreliable.

The Correlation Evidence

In a study of 3,200 keywords across competitive niches, pages ranking in positions 1–3 had a median linking domain DR of 58. Pages ranking 8–10 had a median of 41. The relationship held across finance, health, technology, and e-commerce. No other metric showed a tighter correlation at scale.

How to Use DR in Practice

Use DR as a floor, not a target. Define your minimum acceptable DR based on your niche’s competitiveness — typically DR 30 for low-competition niches, DR 45+ for medium, and DR 60+ for finance, health, or legal verticals. Then filter by relevance within that floor. On AuthorityLinkz, the DR slider in our marketplace lets you set an exact floor and browse only qualifying sites — no spreadsheet required.

One Important Caveat

DR is a domain-level metric. A DR 60 site with millions of spam pages and one legitimate section is not the same as a DR 60 niche authority. Always check organic traffic and content quality. High DR combined with real organic traffic is the signal stack that predicts ranking lift most reliably — which is why AuthorityLinkz displays both metrics for every listing.