Domain Authority vs Domain Rating: what the scores mean

Domain Authority, Domain Rating, and Authority Score are not three names for the same number. Moz DA predicts relative ranking potential, Ahrefs DR measures relative backlink-profile strength, and Semrush AS combines link power with estimated traffic and spam indicators.

Google does not use any of those vendor values as its own score. Google’s Search Central documentation says third-party “reputation” and “authority” scores do not correspond to Google signals and do not come from Google.

That does not make the metrics useless. It makes the job narrower: use each score as a diagnostic inside the tool that created it, against an appropriate competitor set, then validate the diagnosis with rankings, pages, links, technical evidence, and business outcomes.

Domain Authority, Domain Rating, and Authority Score are different metrics

The labels sound interchangeable because all three compress a large domain into a number near 0–100. The similarity stops there.

• Moz Domain Authority (DA) predicts how likely a domain is to rank relative to competitors. Moz calculates it with backlink data from Link Explorer and a machine-learning model.
• Ahrefs Domain Rating (DR) shows the relative strength of a website’s backlink profile in the Ahrefs database. It is explicitly a link-based, logarithmic metric.
• Semrush Authority Score (AS) is a compound quality metric that uses link power, estimated organic traffic, and spam indicators.

Each vendor crawls a different portion of the web, resolves links differently, and applies a different model. If one report shows DA 31, another DR 22, and another AS 27, you do not have three measurements of one underlying quantity. You have three diagnostic lenses.

The fourth label, topical authority, is different again. It is not a standardized number from Google, Moz, Ahrefs, or Semrush. I use it as an operating model for how completely and coherently a site serves one subject.

The fifth concept, Google PageRank, belongs to Google’s own ranking systems. Its current values are not exposed through a public Google checker. No public DA-to-PageRank or DR-to-PageRank conversion exists.

Domain Authority vs Domain Rating

The cleanest distinction is the question each metric tries to answer.

Moz DA asks: based on Moz’s model and link data, how likely is this domain to rank compared with other domains?

Ahrefs DR asks: how strong is this domain’s backlink profile relative to the other domains in the Ahrefs database?

That difference changes how you use the outputs. A DA trend can be a broad competitive benchmark inside Moz. A DR gap can help identify that competing domains have materially stronger referring-domain profiles inside Ahrefs. Neither explains whether your page satisfies a query, whether Google chose the correct canonical, or whether the article contains evidence worth citing.

Why the same site gets different DA and DR values

The tools do not share one index. Moz can discover or classify a link that Ahrefs has not, and the reverse can happen. Their models also weigh the observed graph differently.

DR is logarithmic. Moving from 20 to 30 is not designed to represent the same amount of link-profile growth as moving from 70 to 80. DA is also relative and model-based; it can move when Moz updates its index or model even if you changed nothing on the site.

This is why cross-vendor score matching is noise. Choose one tool for a trend line. Keep the unit stable.

How Moz Domain Authority works

Moz defines Domain Authority as a search engine ranking score that predicts how likely a website is to rank on search engine results pages compared with competitors. The scale runs from 1 to 100.

The two important words are predicts and compared.

DA does not cause a page to rank. Moz says directly that DA is not a Google ranking factor and has no effect on the search results. It is the output of Moz’s own model, built from Moz link data and trained to predict relative ranking potential.

Use DA for:

• comparing domains that compete in a similar search market;
• tracking a domain inside the Moz ecosystem over time;
• adding context to link prospecting or competitor research;
• spotting a change that deserves a deeper link and ranking audit.

Do not use DA for:

• setting a universal “good website” threshold;
• pricing a backlink without reviewing the linking page, relevance, traffic, placement, and editorial standards;
• claiming Google trusts one domain more than another;
• diagnosing why a specific URL does not rank.

Moz’s own guidance says to use DA comparatively and in context, not in isolation. That is the right operating rule for every third-party authority metric.

How Ahrefs Domain Rating works

Ahrefs defines Domain Rating as the strength of a website’s backlink profile compared with others in its database on a 0–100 logarithmic scale.

The simplified DR logic considers:

1. how many unique domains link to the target;
2. the DR of those linking domains;
3. how many unique domains each referring site links to.

A relevant editorial domain that links selectively can therefore be more meaningful to the model than a domain that links out to an enormous number of sites. Ahrefs then places the result on its relative 0–100 scale.

DR is useful for comparing link profiles, but it deliberately leaves many things out. Ahrefs’ own authority checker explains that DR does not consider variables such as traffic, domain age, or link spam. It does not read your product positioning, test intent fit, or inspect whether the page is indexable.

What people mean by “Ahrefs domain authority”

Usually they mean Domain Rating. Ahrefs does not call DR “Domain Authority”; that name belongs to Moz’s separate metric.

Use the precise label in reports:

• DA 28 (Moz)
• DR 21 (Ahrefs)
• AS 24 (Semrush)

That small discipline prevents clients and teams from comparing numbers that were never designed to match.

How Semrush Authority Score works

Semrush Authority Score is broader than Ahrefs DR. Semrush describes it as a compound metric for the overall quality of a website or webpage.

Its three main facets are:

• link power: the quality and quantity of backlinks;
• organic traffic: Semrush’s estimate of average monthly organic search traffic;
• spam factors: signals intended to identify an unnatural or manipulated profile.

This changes the interpretation. A site can have many backlinks but a weaker Authority Score if the profile looks unnatural or the link strength is not supported by estimated search visibility. Conversely, an AS movement may reflect Semrush traffic estimates rather than a newly gained or lost link.

Semrush advises using Authority Score for domain comparison, not for declaring an absolute good or bad threshold. That also means AS should not be translated into DA or DR. The shared 100-point appearance is interface design, not a shared formula.

How do I find out my Domain Authority?

Use the official checker for the metric you actually want:

Record four fields beside every value: vendor, date, scope, and competitor set. “Authority 32” is ambiguous. “Ahrefs DR 32 on 18 July 2026, compared with five Finnish B2B SEO competitors” is an auditable observation.

If your goal is subject coverage rather than link strength, use the browser-only Topical Authority Audit. It inspects observable page and link signals; it does not pretend to reveal a Google score.

What is a good Domain Authority or Domain Rating?

There is no universal good authority score.

A local specialist with DR 18 may have the strongest relevant link profile in its commercial result set. A software review publisher with DR 70 may still be weaker than the domains it competes with. The useful benchmark is the set of sites that rank for the queries and markets you need to win.

Use this comparison process:

1. Choose one vendor metric.
2. Export the domains ranking for 20–50 commercially relevant queries.
3. Separate true competitors from marketplaces, publishers, forums, and giant platforms.
4. Compare the median and range, not only the strongest outlier.
5. Inspect the actual referring pages behind the scores.
6. Compare page-level intent, content, and links before turning the domain gap into a forecast.

The score tells you about the tool’s model of the domain. The search result tells you which pages currently win. Your plan needs both views.

Why arbitrary thresholds create bad decisions

A target such as “get DA above 50” has no business meaning by itself. It can redirect budget toward links that move a vendor model without improving qualified visibility, citations, or revenue.

A better target is concrete: earn ten editorial referring domains from publications that influence the subject, move three commercial clusters into the top ten, and document which links or evidence accompanied the change. DA or DR can sit beside that target as context.

How to increase Domain Authority without gaming the metric

You cannot safely guarantee a rapid DA increase because Moz controls the index and model. You can improve the underlying site and link profile in ways that may move third-party metrics and also create independent value.

1. Reclaim links you already earned

Find strong links pointing to 404s, redirected chains, retired campaign URLs, or the wrong protocol and host. Restore the useful destination or redirect to the closest equivalent. Do not funnel every broken URL to the homepage.

2. Consolidate competing assets

If two weak articles answer the same intent, merge the useful material into one owner URL and redirect the duplicate. This can concentrate internal and external signals while making the site easier to understand.

3. Publish evidence with a stable citation target

Original datasets, calculators, checklists, benchmarks, experiments, and decision frameworks give other writers a reason to cite you. Put the methodology, date, limitations, downloadable data, and preferred citation on a stable URL.

My AI Recommendation Index follows that pattern: a public dataset, methodology, downloadable JSON and CSV, versioned release, license, and DOI. The distribution footprint matters because the asset is inspectable outside my own claims.

4. Earn links from the subject, not just high-score domains

Review the linking page itself. Ask whether it is indexed, editorially maintained, contextually relevant, likely to be read, and selective about outbound links. A generic UGC profile on a DR 90 platform is not automatically stronger evidence than a cited method in a smaller industry publication.

5. Build internal routes to the pages that matter

Internal links do not change the number of referring domains, but they help discovery, clarify relationships, and distribute attention through the site. Fix contextual orphans and link from relevant pages using descriptive anchors.

6. Keep technical failures from wasting earned links

Canonical mistakes, accidental noindex directives, broken migrations, client-rendering failures, and redirect chains can separate the page from the signals it earned. Use the Technical SEO Field Kit before and after releases.

What not to do

Avoid bulk guest-post packages, private link networks, sitewide footer trades, expired-domain chains, and irrelevant directory blasts. Even when a tactic moves a third-party score, it can create no audience value and expose the site to spam risk. The goal is not to make a dashboard greener. It is to earn useful, defensible visibility.

Why Domain Authority can rise without rankings improving

DA can increase while organic performance stays flat. Several systems can diverge:

• Moz discovers new links or updates its model.
• The links point mostly to pages unrelated to your target cluster.
• Competitors improve at the same time.
• Your ranking page mismatches the query intent.
• Several URLs compete for the same query.
• The important URL is canonicalized, noindexed, or poorly linked.
• The page summarizes existing results without adding useful evidence.
• The domain earns links in one topic while trying to rank in another.

The reverse also happens. Rankings can improve while DA stays flat because you fixed intent ownership, consolidated pages, improved technical eligibility, or published a materially better answer without adding many new referring domains.

That is why authority metrics belong in a diagnostic dashboard, not at the top of the business scorecard.

Domain authority vs topical authority

Domain-level link metrics and topical authority answer different operational questions.

DA, DR, and AS ask about the domain through a vendor model. The model may emphasize ranking potential, backlink strength, traffic, or spam risk.

Topical authority asks whether one subject is complete and coherent enough to serve. The observable layers include:

• mapped buyer intents with distinct owner URLs;
• useful page-level answers and original evidence;
• contextual internal routes;
• query distribution across the intended pages;
• relevant referring domains and independent mentions;
• freshness of decision-critical facts;
• crawl, index, render, and canonical eligibility.

A high-DR generalist can have shallow coverage of your niche. A low-DR specialist can cover it deeply but still lack external validation. The durable target is not one or the other: build a useful subject system and earn relevant recognition for it.

Read the full topical authority pillar for the mapping, measurement framework, failure atlas, and live DR 6 case.

What should you measure instead of one authority score?

Keep the authority metric, but place it in a layered scorecard:

This prevents a score change from dictating the wrong fix. If DR is flat but commercial pages are gaining qualified traffic and citations, the program may be working. If DR rises while owner URLs lose visibility, the link number is not the bottleneck you should celebrate.

Use the decision tree below to route the observed symptom to the correct system.

The operating rule

Do not ask, “How do I get authority to 50?” Ask, “Which outcome is blocked, which layer could explain it, and what evidence would prove the fix worked?”

Use Moz DA to compare Moz’s ranking-potential prediction. Use Ahrefs DR to compare link-profile strength. Use Semrush AS for Semrush’s compound view of links, traffic, and spam. Use Google Search Console and your commercial analytics to measure the outcome.

Then build the part no vendor score can build for you: a focused body of work that people can use, verify, and cite.