Domain Rating vs. Domain Authority: What These Backlink Metrics Actually Measure in 2026

What is Domain Authority (DA) and what does it measure?

Domain Authority is a 0–100 score from Moz that estimates how likely a website is to rank in search results, calculated mainly from the number and quality of linking root domains pointing to a site and weighted against how authoritative those linking domains are relative to other sites in Moz's index.

DA is relative, not absolute — a score of 40 means a site's link profile looks stronger than most of the sites Moz has indexed, not that it will outrank a competitor with a 38. Moz itself describes DA as a comparative metric for competitive research, not a ranking input, and updated the underlying model in 2019 (DA 2.0) specifically because scores had been inflating over time as the web grew.

What is Domain Rating (DR) and how does it differ from DA?

Domain Rating is Ahrefs' 0–100 score that measures the strength of a site's backlink profile based on the quantity and quality of unique referring domains, calculated from Ahrefs' own link index using a different weighting formula than Moz's — which is the main reason the same domain can show a 35 DR and a 50 DA at once.

The two tools also crawl and refresh their indexes differently, assign authority to linking domains differently, and treat nofollow and low-quality links differently in their calculations. There is no conversion formula between DR and DA because they aren't measuring on the same scale or from the same underlying data — they're two separate companies' independent estimates of the same rough idea.

Are DR and DA official Google ranking factors?

No. Google has repeatedly confirmed it does not use Domain Rating, Domain Authority, or any third-party SEO tool's metric in its ranking systems; both scores are built entirely from each vendor's own crawled link index as a convenience proxy for authority, not a window into Google's actual algorithm.

Google's own guidance focuses instead on the quality and relevance of individual links and penalizes manipulative link acquisition regardless of what it does to a third-party score — see Google's link spam policies for what actually triggers action. A site can carry a high DR or DA built on manipulated links and still lose visibility, or carry a modest score and outrank bigger-looking competitors because its links are genuinely relevant and its on-page relevance and technical SEO are stronger.

How should businesses actually use DR and DA?

Use DR and DA as a fast, directional filter — a quick way to compare how authoritative a prospective link source or a competitor looks relative to others in the same index — not as a target to hit or proof that a campaign succeeded. They're useful for triage, not for grading results.

That makes them genuinely helpful earlier in a backlink building program, when you're screening dozens of potential guest posting or niche edit opportunities and need a rough cut before manually checking relevance, real traffic and editorial quality.

• Use DR/DA to screen link prospects quickly, then manually verify relevance and real organic traffic
• Compare your score against direct competitors' trend lines over time, not a single snapshot
• Treat a jump in DR/DA as a side effect worth noting, never as the campaign's success metric
• Weight topical relevance and referring-domain diversity above the raw number every time

What mistakes do businesses make chasing these scores?

The most common mistake is making DR or DA the actual goal of a link building campaign, which leads businesses toward link sellers and PBN-style networks that exist purely to show a high score — sites with inflated authority but little real traffic, poor topical relevance, or link patterns that look manipulated to Google even though they look impressive in a dashboard.

That approach can quietly backfire: a link that lifts a vanity score while adding no relevant referring traffic does nothing for rankings, and a backlink profile built around manipulated high-DR placements is exactly the kind of pattern Google's spam systems are designed to discount or penalize. Before paying for links sold on DR or DA alone, it's worth understanding how much backlinks actually cost and why price and quality rarely track a score in a straight line.

• Buying links from sites built specifically to farm high DR/DA, with no real audience
• Comparing your score to a competitor's without checking whether their links are even relevant
• Assuming a rising score means rankings are improving, without checking actual keyword positions
• Picking a link vendor by promised DR/DA minimums instead of asking about traffic and relevance

Which metric should you track, and what matters more?

Track both DR and DA directionally over time if you already pay for the tools, but weigh them far below referral traffic, topical relevance of referring domains, and actual movement on your target keywords — organic visibility is the only metric that confirms a link building program is working.

A well-run program, whether it's digital PR placements or targeted guest posts, should move all of these together: real traffic from the linking page, relevant anchor context, and gradual keyword movement. If DR or DA rises without any of that, the links were the wrong links, regardless of what the dashboard says. For a broader view of what a credible program should include, see our guide on choosing a backlink service.