Domain Rating vs Domain Authority: What Actually Matters for SEO

Two Metrics, One Confusing SEO Conversation

Domain Rating (DR) and Domain Authority (DA) are often used interchangeably in SEO discussions — and they shouldn't be. They're different metrics, calculated by different companies using different methodologies, and they don't always agree with each other. Understanding the differences helps you make better decisions about which sites to build links from — and how to set realistic expectations for your own site's metric growth.

Domain Rating (DR): Ahrefs' Metric

Ahrefs' Domain Rating measures the strength of a website's backlink profile on a logarithmic scale from 0 to 100. It's calculated primarily based on the number of referring domains pointing to the site and the DR of those referring domains — essentially a measure of how much link equity the site has accumulated. Key characteristic: DR is purely a backlink metric. It does not factor in organic traffic, content quality, or engagement signals.

Domain Authority (DA): Moz's Metric

Moz's Domain Authority also operates on a 0–100 scale and predicts how likely a website is to rank in search engine results. Like DR, it's primarily driven by the backlink profile, but Moz's algorithm weights different factors slightly differently, including the quality of root domains linking to the site. DA is updated monthly, while DR updates more frequently.

Which Metric Should You Use for Site Vetting?

In practice: use DR (Ahrefs) when you want a pure backlink profile strength assessment — it tends to be more responsive to recent link changes. Use DA (Moz) as a secondary check or when working with clients familiar with Moz's ecosystem. Always pair either metric with organic traffic data — a site with DR 60 and zero organic traffic is a fundamentally different and far less valuable link source than one with DR 40 and 50,000 monthly visitors.

The Metric That Actually Matters to Google

Here's the honest truth: Google doesn't use DR or DA. Neither metric appears in Google's ranking algorithm. What Google does use is its own version of PageRank — an internal, unpublished score. DR and DA are third-party approximations of underlying authority signals. They're useful tools, but they're indicators, not the signal itself. Build links that would make sense even if these metrics didn't exist — from real, relevant, editorial-standard sites. The metric improvement will follow naturally. If you'd like to go deeper here, Moz's guide to Domain Authority is worth a look: read more here. And if this was useful, check out our post on Building Topical Authority Through Content and Links.