Domain Rating vs Domain Authority: The Difference

Someone once forwarded me a competitor's stats in a panic: "Their Domain Authority is 58 and our Domain Rating is only 44 — we're losing." We weren't losing. We were comparing two numbers that were never built to sit in the same column.

This is the most common mistake I see with these two metrics, so let's clear it first.

Same idea, two different scorekeepers

Domain Rating (DR) is Ahrefs' 0–100 estimate of a domain's backlink strength. Domain Authority (DA) is Moz's 0–100 estimate of roughly the same thing. Both try to answer "how much off-page authority does this domain have?" and both squeeze the answer onto a 0-to-100 dial.

Here's the part that trips everyone: they're calculated by different companies, from different crawls of the web, using different formulas. That makes them like Rotten Tomatoes and Metacritic reviewing the same film. Both rate it out of 100, both are trying to capture "is this good," and both routinely land ten or fifteen points apart — because they polled different critics with different rubrics. A movie at 78 on one and 65 on the other isn't a contradiction. Neither is a site at DR 44 and DA 58.

Why the numbers never match

Three reasons the two scores drift apart for the same domain:

• Different link indexes. Each tool runs its own crawler and builds its own map of who links to whom. Ahrefs might know about backlinks Moz hasn't found, and vice versa. Different inputs, different scores.
• Different formulas. Even on identical link data, the two weigh things differently — how much a single strong link counts, how they discount spam, how they handle nofollow. The math is proprietary and it isn't the same math.
• Different scaling. Both compress a huge range of real-world authority onto 0–100, and each picks its own reference points for what a 30 or an 80 means.

So the rule is blunt: never compare a DR to a DA. If you're sizing up five competitors, check all five in the same tool. A DR-to-DA comparison isn't a close-enough approximation — it's a category error.

Both scales are logarithmic

One trait they do share, and it changes how you read progress. Neither scale is linear. Moving from 20 to 30 is comparatively easy; moving from 60 to 70 is brutally harder, because each step near the top represents an enormous jump in link authority. A site sitting at DR 25 that climbs to 35 in a few months hasn't done something small — and a site stuck at 68 that only reaches 70 in a year may have worked far harder. Judge the effort by where on the curve you're standing, not by the raw point count.

Neither one is a Google ranking factor

Worth saying plainly, because it's easy to forget while staring at the dial: Google doesn't use DR or DA. They're third-party proxies invented by Ahrefs and Moz, not signals in Google's algorithm. When a rising DR lines up with better rankings, it's usually because both are downstream of the same cause — you earned real links. The score is the thermometer, not the fever. Chase links and content quality; let the number report on your progress rather than becoming the goal.

How to actually use them

Put together, the practical playbook is short:

1. Pick one metric and stick to it. Whichever tool you have, use it for every comparison so you're always measuring with the same ruler. You can spot-check any site's DR with the Domain Rating Checker.
2. Benchmark, don't obsess. Line your domain up against three or four direct competitors on that one metric. The gap and the direction matter; the absolute value in isolation doesn't.
3. Watch the trend over months. These scores update in steps and wobble; a single reading tells you little, a six-month slope tells you plenty.
4. Vet domains before you trust a high score. A big number on a domain with a spammy past is a liability. Check a site's history and registration with the Domain Age & WHOIS Checker, and confirm its DNS and email posture with the DNS & Email Records Checker before you read anything into its authority.
5. Fix the foundation the number sits on. Authority flows to sites that are crawlable and clean; tidy your on-page signals with the Meta Tag Generator and get the small details right, down to a readable URL slug on every page.

The verdict

Domain Rating and Domain Authority are two scorekeepers grading the same match with different rulebooks — Ahrefs' DR and Moz's DA, both 0–100, both backlink-based, both third-party, neither one Google. Use whichever you have as a relative benchmark against competitors and a trend line for yourself, remember the scale is logarithmic so late gains cost more, and stop putting a DR next to a DA. They were never on the same scoreboard.