Why Are Moz Rank and Ahrefs Rank Different?
By SM Mehedi Hasan
Moz Rank and Ahrefs Rank differ because they measure different things on different scales, using completely different backlink databases. Ahrefs Rank is a global leaderboard position measured in the millions, while Moz scores authority on a 0-100 scale. Different data, different math, mismatched numbers.
If you have ever checked one site in both tools and seen numbers that do not line up, you are not doing anything wrong.
The mismatch is built into how each tool works. So, before you stress over which score is “correct,” it helps to understand what each number actually counts.
Table Of Contents
What Do Moz Rank and Ahrefs Rank Actually Measure?
Moz Rank and Ahrefs Rank measure backlink strength, but they express it in two opposite ways. One gives you a score out of 100. The other gives you a position in a worldwide list of every site it knows about.
Here is where most people get tripped up. The term “Moz Rank” is used loosely, which causes half the confusion before any comparison even starts.
There were actually two separate Moz things people call “Moz rank”:
- MozRank (original): A page-level link popularity score on a 0 to 10 logarithmic scale, modeled closely on Google’s old PageRank. Moz deprecated this as a public metric back in 2019.
- Domain Authority (DA): Moz’s current, live metric. A 0 to 100 score that predicts how likely a domain is to rank, built from links plus a machine learning layer.
So when someone today says “my Moz rank,” they almost always mean Domain Authority, because MozRank itself is no longer shown in Moz tools.
Now the other side. Ahrefs Rank (AR) is its own specific metric, and it is not the same as Domain Rating (DR).
- Ahrefs Rank (AR): A global ranking of every website in the Ahrefs index, ordered by backlink strength. Rank #1 is the strongest site on the web. A lower number means stronger.
- Domain Rating (DR): A 0 to 100 score showing the strength of a domain’s backlink profile.
Right now, Ahrefs Rank #1 belongs to the site with the strongest link profile, and the ranking continues into the millions for everyone else. That is a wildly different kind of number than a 0-to-100 score.
Are You Comparing the Same Type of Number?
No, and this is the part nearly every comparison article skips. Comparing Moz’s authority score to Ahrefs Rank is a bit like comparing a student’s test percentage to their class rank.
One is a grade (DA 45). The other is a position (AR 280,000). They can describe the same site and still look nothing alike, because they answer different questions.
Here is a clean breakdown of the actual scales:
| Metric | Scale / Range | Direction |
|---|---|---|
| MozRank (old) | 0 to 10 | Higher is stronger |
| Domain Authority | 0 to 100 | Higher is stronger |
| Ahrefs Rank (AR) | 1 to millions | Lower is stronger |
| Domain Rating | 0 to 100 | Higher is stronger |
Look at the Ahrefs Rank row. A “good” AR is a small number, the opposite of every other metric in the table. That alone explains a chunk of the confusion people run into.
Why Are the Two Numbers So Different?
The two numbers differ for four core reasons: data size, calculation model, scale type, and update timing. Each one pulls the scores apart on its own, and together they almost guarantee the numbers will never match. Let me walk through each.
Do They Pull From the Same Backlink Data?
They do not, and this is the biggest single cause. Ahrefs runs one of the largest backlink crawlers on the web with AhrefsBot, so its index is enormous.
Moz crawls the web too, but its link index has historically been smaller. When one tool sees ten million referring links, and the other sees three million for the same site, the resulting scores will never agree.
More data means a fuller, often higher picture of a site’s link profile.
Are They Even Calculated the Same Way?
No, and the recipes are genuinely different. Domain Rating is almost purely a link-based metric. It looks at the number and quality of dofollow referring domains and deliberately ignores traffic, spam signals, and domain age.
Domain Authority casts a wider net. It blends link data with a machine learning model trained to predict actual Google rankings, and Moz folds in older signals like link diversity and trust.
So DA is trying to estimate ranking ability, while DR is strictly measuring link strength. Two different goals, two different outputs.
Why Does Your Score Change When You Do Nothing?
Because both metrics are relative, not absolute. Your number can move even if you never gained or lost a single link.
Picture it this way. If a giant site suddenly earns billions of new backlinks, it pushes everyone else slightly down the curve. Ahrefs explains that with DR, a site at the top cannot go past 100, so other sites are nudged down by 1 point.
Ahrefs Rank works the same way: rivals gaining stronger links can overtake you and push your rank number higher, which means worse. You stood still, and the web moved around you.
Pro tip: Before you panic over a 2-point drop, check whether your referring domains actually fell. If your links held steady, the change is almost always the index shifting around you, not your site weakening.
Which Number Should You Actually Trust in 2026?
Trust neither as a final verdict, and use both as rough proxies. Google has confirmed it does not use Domain Authority or Domain Rating as direct ranking factors. These are third-party estimates, not the scoreboard Google plays on.
That said, the underlying signal (quality links from real sites) does matter for visibility, including how often you surface in AI Overviews and AI-driven answers, which still lean heavily on trusted, well-linked sources.
So the metrics point to something real; they just aren’t the thing itself. Here is the practical 2026 catch that most people miss. DR has become easy to inflate.
Operators buy expired domains that already carry old backlinks, then 301-redirect them into a target site. Ahrefs credits those referring domains, and DR climbs fast with no real authority earned and no matching traffic lift.
Some sites have jumped from DR 15 to DR 55 in under six months this way, while organic traffic stayed flat.
That is exactly why a single number, from either tool, is a weak decision-maker. Pair the score with real organic traffic data before you trust it.
In My Experience
Honestly, when I first started cross-checking client sites, the gap between Moz and Ahrefs drove me a little crazy. One site I audited had a DA of 38 in Moz, but a DR of 61 in Ahrefs, and the founder was convinced one tool was “broken.”
It was not broken. When I dug into the referring domains, Ahrefs had simply indexed a batch of links from a recent PR campaign that Moz had not crawled yet. Three weeks later, Moz caught up, and DA crept to 44.
The lesson stuck with me: these tools are photographs taken on different days with different cameras.
Judge the trend across a few weeks, never a single snapshot, and never two snapshots from two tools side by side as if they should match.
What Are the Common Pitfalls When Comparing Moz and Ahrefs?
Most mistakes here come from treating two unrelated numbers as if they should agree. These are the slip-ups I see constantly, and why each one happens.
- Comparing a score to a rank. People line up DA 50 against Ahrefs Rank 90,000 and expect logic. They are entirely different units, so the comparison means nothing.
- Forgetting MozRank is gone. Some readers still hunt for the old 0-10 MozRank. It was deprecated in 2019, so any tool still showing it is using stale or scraped data.
- Treating either as a Google ranking factor. Neither feeds Google’s algorithm. Chasing the number instead of real rankings wastes months of effort.
- Ignoring the relative nature. A drop often reflects the wider index moving, not your site declining. Reacting to that is a classic rookie panic.
- Buying links from “high DR” sites blindly. With redirect-based DR inflation common in 2026, a high score can hide a worthless link source. Always check the site’s real traffic first.
Workflow Example: Checking a Site's Authority Across Both Tools
Here is a realistic flow I use when a client asks why their numbers disagree. It keeps you from drawing the wrong conclusion from a single tool.
Input: One domain you want to evaluate, plus access to Moz (DA) and Ahrefs (DR and AR) free checkers.
Process:
- Pull Domain Authority from Moz and note the number of referring domains it reports.
- Pull Domain Rating from Ahrefs and note its referring domains count.
- Record the Ahrefs Rank separately; a lower number indicates a stronger ranking.
- Compare the referring domain counts first, not the scores. The gap there explains most of the score gap.
- Layer in organic traffic data to sanity-check whether the authority is real or inflated.
Output: A short profile, for example, “DA 42 / DR 58 / AR 110,000, with Ahrefs seeing 2x the referring domains and solid organic traffic.”
Result: Instead of asking “which score is right,” you now understand why they differ and whether the authority is genuine. That is a decision you can actually act on, such as approving or skipping a guest post placement.
Pro tip: When two sites show the same Domain Rating, use Ahrefs Rank to break the tie. The site with the lower AR usually has the stronger overall profile, even though its DR looks identical.
Final Takeaway
Moz Rank and Ahrefs Rank were never designed to match, and expecting them to is the real source of the frustration.
One measures authority on a 0 to 100 scale, the other as a global position in the millions, and they read from different parts of the web at different times.
Use them as directional signals. Watch the trend, cross-check with real traffic, and keep earning genuine links from sites people actually visit. Do that, and it stops mattering which tool shows the prettier number.
Frequently Asked Questions
Not exactly. The original MozRank was a 0-10 page-level metric that was deprecated in 2019. Today, most people say “Moz rank” means Domain Authority, Moz’s live 0-100 score.
That is normal. Ahrefs Rank lists every site in its index by strength, so most sites sit deep in the millions. A lower number means a stronger backlink profile.
Neither is “accurate” in an absolute sense. Ahrefs usually has more backlink data, while Moz focuses on predicting ranking potential. Use both as estimates, not facts.
No. Google has confirmed it does not use either as a direct ranking factor. They are third-party estimates of link strength, useful for comparison but not part of Google’s algorithm.
Both metrics are relative. When other sites gain stronger links, your score can fall even though your own links stayed the same. The index shifted, not your site.
Is an SEO Specialist and AI Tools Researcher with over 4 years of hands-on experience in search engine optimization. As the founder of Smart AI Helper Pro, he tests and reviews AI writing, SEO, and marketing tools to help creators and business owners grow faster with practical, research-backed strategies.
