Domain Rating (DR) is Ahrefs' 0–100 score for the strength of a site's backlink profile; Domain Authority (DA) is Moz's 0–100 predictive score for how likely a domain is to rank. Neither is a Google ranking factor. If you already use Ahrefs, track domain rating; if you live in Moz, track DA — they correlate at 0.89, so the choice matters less than picking one and watching the trend.
At Grid13 we build automated blog systems that raise both SEO and AI-search visibility, and clients ask us about these two numbers constantly. So here is the honest version: what each score measures, where they disagree, and which one is worth your attention this quarter.
What is Domain Rating and how is it calculated?
Domain Rating is Ahrefs' metric. Ahrefs introduced Domain Rating in 2014 with its own calculation methodology and its own crawl index. DR looks almost entirely at your backlink profile: the number of unique domains linking to you, how strong those linking domains are themselves, and how that link equity flows out to the pages they point to.
The key word is relative. DR is scored on a logarithmic curve, so climbing from 20 to 30 is easy and climbing from 70 to 80 is brutally hard. A domain rating of 40 does not mean "40% of the way to perfect" — it means you sit at a specific point in Ahrefs' ranked index of every site it has crawled.
What is Domain Authority and why do SEOs still quote it?
Domain Authority is the older of the two. Moz introduced Domain Authority in 2012 as the first widely-adopted predictive ranking score, and the name stuck so hard that people now use "domain authority" as a generic term for any site-strength number — including domain rating. That confusion is the whole reason this article exists.
DA is broader than DR. Moz's algorithm evaluates over 40 factors when calculating Domain Authority, including your backlink profile, linking root domains, link equity distribution, site age, and content-quality signals. It is trained to predict ranking ability, not just link strength — which is a different goal from what DR is built for.
One number that puts the scale in perspective: according to Moz, only three sites have ever reached a Domain Authority of 100 — Blogger, Google, and YouTube. If your DA is 35 and you are frustrated it is not 60, remember what 100 actually costs.
Domain rating vs. domain authority: where they actually disagree
Both scores run 0–100 on a logarithmic scale, but the algorithms, data inputs, refresh cadences, and interpretation guidelines all differ. Here is where that bites in practice.
- What they weigh. DR is a link-strength score. DA is a ranking-likelihood score that folds in more than 40 signals. Two sites with identical backlinks can show different DA if one has thinner content or a shakier history.
- Different indexes. DR reads the Ahrefs crawl; DA reads Moz's Mozscape link graph. Each has found different links, so the raw inputs are never identical.
- Refresh timing. Moz refreshes the Mozscape index roughly every 30 days. A big link you earned yesterday will not show in DA for weeks — so a flat score is not proof your work failed.
- Where they agree. Despite all of that, Ahrefs DR and Moz DA correlate at 0.89. For most sites they rise and fall together. If they diverge sharply, that gap is a clue worth investigating, not noise to ignore.
Which one should you actually track?
Track the one that lives in the tool you already pay for. Switching tools to chase a "better" number wastes money you could spend on content. Beyond that, three principles:
- Pick one and never mix them in the same report. Comparing this month's DA to last month's DR is comparing two rulers. It tells you nothing.
- Watch the trend, not the digit. A DR moving 22 → 26 → 31 over two quarters is a healthier signal than a static 45. Direction beats altitude.
- Never treat either as a ranking factor. Google does not use DA or DR. They are third-party estimates. Chasing the score instead of the traffic is the single most common mistake we see, and it is a trap.
Why care at all, then? Because links still move rankings. Backlinko found the #1 result in Google has on average 3.8x more backlinks than positions #2 through #10. DR and DA are just cheap proxies for that link strength — useful as a dashboard needle, useless as a goal.
How to check and track your domain rating this week
Here is a method you can run today. We use this exact sequence with clients before we touch a single blog post.
- Get today's numbers. Open the free Ahrefs Website Authority Checker for your DR and the Moz Link Explorer free tab for your DA. Type your root domain — no subfolders. Write both down with the date.
- Pull three competitors. Run the same two tools on the three sites already ranking for your money keyword. Now you have a realistic target band, not a fantasy of hitting DA 90.
- Log it monthly. Put the date, DR, and DA in one spreadsheet and re-check on the same day each month. Because Moz only refreshes every 30 days, checking weekly just shows you the same stale number.
- Feed the trend, not the score. If the line is flat, the fix is almost never "buy links." It is publishing content worth linking to, on a schedule. That is where an automated blog system like Grid13 earns its keep — consistent, topically-focused posts that attract citations from both Google and AI engines.
What not to do: do not buy a DR-boosting link package. Those links get discounted or penalized, and a purchased spike that reverses next refresh is worse than slow honest growth. And do not report DA to a client as if it were a Google metric — it is not, and a savvy reader will catch it.
Why focus beats a bigger domain, and what it means for AI search
Topic focus compounds faster than raw size. Niche-focused sites reach Domain Authority 40 roughly 30% faster than generalist sites — about 18 months versus 26 months for broad-topic domains. A small, sharply-focused site earns authority quicker than a sprawling one, which is good news if you cannot compete on budget.
It also matters more than ever because domain-level muscle is shrinking as a ranking lever. Domain-level signals now account for about 10% of ranking weight, down from 12% in 2024. Page-level relevance and clear, citable answers are eating that share — and those are exactly the things AI answer engines reward. So the smart play is not to obsess over a domain rating digit. It is to publish focused, well-structured content that both Google and AI systems want to cite.
Frequently Asked Questions
Is domain rating a Google ranking factor?
No. Domain rating is Ahrefs' own metric and Google does not use it. Treat it as a third-party estimate of your backlink strength, useful for spotting trends but never as a goal in itself.
What is a good domain rating score?
There is no universal number — a "good" DR is one that matches or beats the sites ranking for your target keyword. Because the scale is logarithmic, a DR in the 30s can dominate a low-competition niche while being invisible in a crowded one. Benchmark against your real competitors, not an abstract target.
Why is my domain rating higher than my domain authority?
Because they read different indexes and weigh different things. DR is almost purely about links, while Moz's DA folds in over 40 signals, so a link-heavy but thin site can score higher on DR than DA. The two still correlate at 0.89 overall, so a small gap is normal.
How often does domain authority update?
Moz refreshes its Mozscape link index about every 30 days, so your DA can only move on that cadence. A link you earned this week may take several weeks to register — checking daily just shows you the same figure.
Should I track domain rating or domain authority?
Track whichever lives in the tool you already use — switching platforms to chase a different number is not worth it. What matters is picking one, logging it monthly, and watching the direction of travel rather than the exact digit.