Page Authority vs Domain Authority: What's the Real Difference?

I get some version of the same question from clients every few weeks: their competitor's domain authority is 55, theirs is 12, so are they finished before they've even started? Almost never. The number that actually decides whether your page beats theirs for one specific keyword isn't domain authority. It's page authority, a separate metric scoped to a single URL instead of the whole site. Mix the two up and you'll either give up on a keyword you could have won, or spend months polishing a page that authority alone was never going to save. Here's how the two actually work, what moves each one, and how I use both before telling a client whether a keyword is winnable.

Page authority and domain authority: the actual definitions

Domain authority (DA) is Moz's 0 to 100 estimate of how likely an entire website is to rank, built mainly from the number and quality of referring domains linking anywhere on that site. Page authority (PA) is the same 0 to 100 scale, narrowed to a single URL. Instead of asking how strong a website is overall, PA asks how strong one specific page is, based on the links pointing directly at that page plus the internal link equity flowing to it from the rest of the site. Both numbers came from Moz, both are logarithmic, so each extra point gets harder to earn, and neither is read by Google's own ranking systems.

Ahrefs runs the same split under different names. Domain Rating (DR) is Ahrefs' domain-wide score, and URL Rating (UR) is its page-level equivalent, both on a 0 to 100 scale, both built from backlink data Ahrefs crawls independently of Moz. A page can carry a UR of 35 on a domain sitting at DR 20, or the reverse, a UR of 8 on a DR 60 domain whose links all point at the homepage. The two scores tell you different things on purpose. DR, like DA, tells you how the whole domain is doing. UR, like PA, tells you whether this specific page has earned enough link equity to compete for this specific keyword.

Open PageRank is the odd one out, and it's the free data source behind my own Website Authority Checker. It only scores domains, on a 0 to 10 scale, with no page-level version at all. That's a function of how it's built: Open PageRank runs the original PageRank formula over a public web graph from Common Crawl, and that graph is far easier to compute at the domain level than to maintain accurately for every individual URL on the web. So when someone asks me to check the page authority using a free domain checker, including mine, the honest answer is that a free domain tool can't do that. Page-level and URL-level scores, PA from Moz and UR from Ahrefs, sit mostly behind paid tools, with a handful of free lookups thrown in. For the fuller picture of how DA itself is built, I wrote a dedicated piece on what domain authority actually measures.

How each score actually gets calculated

None of these companies publish their exact formula, but the ingredients are public knowledge and mostly overlap. Every version starts by crawling the web and mapping which pages link to which. From that map, each tool counts referring domains, unique websites linking in, which matters more than raw link count, weighs how authoritative those linking domains themselves are, and factors in how relevant the link's context is. Moz layers a machine learning model trained against real Google results on top of that data to produce DA and PA. Ahrefs keeps its formula closer to raw link graph math for DR and UR. Open PageRank runs the original, publicly documented PageRank algorithm with none of the machine learning layered on.

The domain-level number, DA, DR or Open PageRank, is essentially an average taken across the whole site, weighted toward however the site's strongest pages perform. The page-level number, PA or UR, skips that averaging and looks only at what points directly at one URL, plus a share of the authority flowing in from internal links on the same site. That's the mechanical reason a page can carry a far higher or lower score than its own domain: the domain number smooths everything together, and the page number doesn't. Crawling itself matters here too. A backlink or an internal link can only pass any authority once a search engine has actually found and indexed the page it sits on, which is why how crawling works quietly underpins every authority score on this page, not just Google's own rankings.

Why a single page can outrank a far stronger domain

Google ranks pages, not websites. That single fact explains most of what looks confusing about authority scores. A DA 25 site with a PA 45 blog post can outrank a DA 60 site whose competing page sits at PA 12, because the page actually being compared in that search result is the one Google evaluates, not the domain sitting behind it. Domain-wide reputation helps at the margins, since a trusted domain can get a new page indexed and trusted a little faster, but it doesn't override a direct, page-level authority gap on the keyword actually being fought over.

I saw this play out clearly with a dental clinic in Pune. Their website's domain authority was unremarkable, nowhere close to the hospital chains and national listing sites also competing for their core local search term, and their page sat around position 59, practically invisible. I didn't touch domain-wide link building in the first month. I fixed the page itself: corrected on-page relevance, cleaned up internal links pointing to it, and got their Google Business Profile properly connected to it. Within two months that one page moved from position 59 into the top five, ahead of domains with a much stronger site-wide profile. Nothing about the clinic's overall DA changed in that window. What changed was the authority and relevance of the one page actually competing for the keyword.

This is common enough that I check page-level signals before I ever quote a domain-level number to a client. If your target keyword's top result sits on a DA 70 domain, that used to be treated as an automatic loss. But if that specific ranking page has thin content, weak on-page relevance, and only a handful of links actually pointing at it, a focused page on a much smaller domain has a real shot. The reverse is also true: a page on a weak-looking domain sometimes carries more authority than it appears to, once its internal links are set up well within a good internal linking structure.

When an Indian small business should care about which metric

For most small businesses I work with, chasing domain authority as a goal is the wrong use of limited time. What actually pays the bills is specific pages ranking for specific searches: a service page for "root canal treatment in Baner", a location page for "AC repair in Wakad". That's a page authority problem, not a domain authority one. Check page-level signals when you're deciding whether a particular page can win a particular keyword this quarter, since that's the number the search result actually turns on.

Domain authority earns its keep at a different altitude: comparing your business against competitors before you commit to a market, evaluating whether a guest post opportunity or directory listing is worth the time, and tracking whether months of off-page work are compounding. If you're a Pune clinic sizing up whether to compete against a hospital chain's website at all, DA, or the free Open PageRank score from my website authority checking guide, tells you the scale of that mismatch before you spend a rupee. If you're deciding whether this month's blog post can rank, page-level signals and plain on-page work matter more than the domain number sitting underneath it, the same lesson the Pune dental clinic above already proved on a single page.

What actually moves each score

Page authority responds to two things you can act on this week: internal links and on-page relevance. Pointing more internal links at a page, from your homepage, your navigation, related blog posts, passes it a larger share of the authority already flowing through your site, and descriptive anchor text tells both the crawling tools and Google what that page is actually about. Matching the page's content tightly to the keyword it's meant to rank for, a real, complete answer rather than a few keyword mentions bolted onto thin text, also lifts PA and UR indirectly, because pages that earn real engagement and external links tend to be the ones that actually answer the question well. My on-page SEO checklist covers the specific, checkable version of this.

Domain authority moves at a slower, sitewide altitude, and the lever is referring domains: the number of separate, real websites linking in anywhere on your site, weighted by how authoritative those linking sites are themselves. Ten links from ten different, relevant websites raise DA further than a hundred links from one low-quality directory that links out to everyone. That's earned mainly through off-page SEO, guest posts, press mentions, partner links and consistent citations, which is a fundamentally slower project than fixing internal links on a single page. My guide to building backlinks for a small business covers the specific outreach process, and it's worth knowing that not every link counts equally either; a nofollow link can still send real traffic and brand signal even when it passes little or no authority through the scoring formula.

Page authority vs domain authority at a glance

Here's the same comparison laid out side by side, since it's easier to reference this way than to hold both definitions in your head at once.

How to check your page authority and domain authority for free

You don't need a paid subscription to get a first read on either number. Here's the sequence I actually run, mixing the free domain checker I built with the limited free page-level lookups Moz still allows.

Step 1: Check domain authority with the free Website Authority Checker

Open my Website Authority Checker and paste in the bare domain, no https and no path. It queries Open PageRank and returns a 0 to 10 score in a couple of seconds, no signup needed. This gives you the domain-wide baseline before you go looking at any single page.

Step 2: Check page authority with Moz's free Link Explorer

Head to Moz's Link Explorer and paste in the exact URL you care about, not just the domain. The free tier allows a handful of lookups a month without a paid account, which is enough for spot-checking a target page before you commit real time to it.

Step 3: Cross-check with Ahrefs UR and DR if you have access

If you or a contact has Ahrefs Webmaster Tools, free once you verify a site, or a trial account, pull DR and UR for the same URL. Ahrefs crawls a different slice of the web than Moz, so a second reading catches links the first tool's index missed.

Step 4: Compare both numbers against the page actually ranking

Run the same two checks on whichever page currently holds the position you want. A domain-level gap that looks impossible often shrinks or disappears once you compare page authority directly, and that comparison is what actually tells you whether the keyword is winnable this quarter.

Step 5: Re-check monthly and track the gap, not the raw number

Authority moves slowly on both scores, so a single reading is a snapshot, not a trend. Log your number and your target competitor's number side by side once a month. A shrinking gap tells you the internal linking and content work from the previous section is actually compounding.

Mistakes people make with these two metrics

Most of the damage I see isn't from ignoring authority scores, it's from reading them wrong.

• Comparing DA to DR, or DA to Open PageRank, directly. They use different scales and different data. Compare a tool to itself over time, never across tools.
• Refusing to target a keyword because a domain-level number looks scary. Check the actual ranking page's PA or UR first; the domain gap is often smaller at the page level, or irrelevant entirely.
• Buying links to push DA up fast. A sudden spike of low-quality links reads as spam to Google's own systems long before it meaningfully moves DA, and the score usually drops back once the index refreshes.
• Ignoring internal links because they feel too small to matter. Internal links are the cheapest, fastest lever on page authority, and most small sites leave them almost entirely unused.
• Treating either score as something Google reads. Neither is a ranking factor. They're proxies for signals, backlinks, trust, relevance, that Google does use, which is exactly why they correlate with rankings without controlling them.

None of these mistakes are expensive to fix once you see them. The common thread is treating a third-party estimate as the actual scoreboard instead of a proxy for it. Fix the real inputs, links, relevance, technical basics, and both numbers follow on their own timeline.

Frequently asked questions

Is page authority or domain authority more important for SEO?

Neither is a Google ranking factor, but both are useful for different decisions. Domain authority helps you compare the overall backlink strength of competing websites before you commit to a market or a keyword. Page authority tells you whether one specific URL has enough link equity to compete for one specific search. When I'm deciding whether a client can realistically rank a page this quarter, I check page-level signals first. Domain authority matters more when you're sizing up a competitor's whole site or judging a link opportunity.

Can a low domain authority site outrank a high domain authority site?

Yes, and it happens often. A DA 25 site with a PA 45 page can outrank a DA 60 site whose competing page sits at PA 12, because Google ranks the page being compared, not the domain sitting behind it. I watched a Pune dental clinic's page move from position 59 into the top five in two months without any sitewide domain authority campaign, just page-level fixes: internal links, on-page relevance and a properly connected Google Business Profile. The page won on its own merits.

What's the difference between Moz's metrics and Ahrefs' metrics?

Moz calls its scores Domain Authority (DA) and Page Authority (PA). Ahrefs calls the same two ideas Domain Rating (DR) and URL Rating (UR). All four run on a 0 to 100 scale and estimate roughly the same thing, backlink strength at the domain or page level, but each company crawls a different slice of the web and weighs links with its own formula. A site can show DA 30 and DR 40 at the same time, and both readings can be correct by their own tool's logic. Compare a score to itself over time, not across tools.

Why doesn't Open PageRank show a page-level authority score?

Open PageRank only publishes domain-level scores because it's built by running the original PageRank formula over a public web graph from Common Crawl, and maintaining an accurate, current graph is far more practical at the domain level than for every individual URL online. That's true of my own Website Authority Checker, which uses Open PageRank data. For a page-level number, Moz's Link Explorer or Ahrefs' Webmaster Tools are the free options, both with limited monthly lookups.

How can I check page authority and domain authority for free?

Use my free Website Authority Checker for an instant domain-level Open PageRank score, no signup required. For page authority, Moz's Link Explorer gives a handful of free lookups a month for any URL. Ahrefs Webmaster Tools adds Domain Rating and URL Rating for free, but only for sites you verify ownership of, so checking a competitor's Ahrefs numbers needs a paid plan or trial. Running both a domain check and a page check on your actual target URL, side by side, is the fastest way to judge whether a keyword is winnable.

Your next step

Check your domain's score with the free Website Authority Checker, then check the actual page you're trying to rank against Moz's free Link Explorer before you decide a keyword is out of reach. If you'd rather I run that comparison against your real competitors, get in touch and tell me the keyword.

Related guides

• Domain Rating vs Domain Authority: DR vs DA Explained
• Domain Trust Score: What It Is and How to Check It Free
• Free Website Authority Checker: check any domain's Open PageRank score instantly.
• Free website SEO checker: audit the on-page side that page authority depends on.
• What is domain authority? Full guide: the deeper dive on how DA is built and what moves it.
• How to check website authority: step-by-step methods across five different tools.
• How to rank on the first page of Google: the full playbook beyond authority metrics.
• How to write a blog post that ranks: the content side of winning a page-level fight.