Domain Authority Checker - Free SEO Tool to Check DA Score

What Is Domain Authority?

Domain Authority (DA) is a score from 1 to 100 developed by Moz that predicts how likely a website is to rank in search engine results pages. The higher the score, the stronger the site's overall SEO foundation and the better its chances of ranking competitively for relevant keywords.

One important clarification upfront: Domain Authority is not a Google ranking factor. Google does not use Moz's DA score in its algorithm, and Moz has never claimed otherwise. However, DA correlates strongly with search rankings because it reflects the same underlying signals Google rewards, quality backlinks, site credibility, and a trustworthy link profile. Improving your DA almost always means you are also doing the things that improve your Google rankings.

The DA scale is logarithmic, which has a practical implication most people overlook: moving from DA 10 to DA 20 is significantly easier than moving from DA 60 to DA 70. Early gains come quickly. Later gains require sustained, compounding effort over months or years.

Perhaps the most important thing to understand about Domain Authority is that it is a relative metric, not an absolute one. There is no score that is universally "good." A DA of 35 can be excellent for a local plumber competing against other small businesses, and weak for a national news publication competing against major media brands. The only number that matters is how your DA compares to the sites you are actually trying to outrank.

Domain Authority vs Website Authority: Is There a Difference?

You will often see the terms used interchangeably, and for most practical purposes they mean the same thing. "Domain Authority" is the specific metric Moz created. "Website authority" is the broader SEO concept describing a domain's overall strength and influence. When someone says "check my website authority," they almost always mean checking their DA score.

What Does Domain Authority Actually Measure?

Moz's Domain Authority algorithm takes dozens of signals into account, but the calculation centres on a few primary factors that account for most of the score:

• Linking root domains: This is the most influential factor. Moz counts the number of unique websites that link to your domain. If your site has 500 backlinks but they all come from a single website, Moz counts that as 1 linking root domain. 50 backlinks from 50 different websites is far more valuable than 500 backlinks from one. Diversifying your link sources matters far more than raw link volume.
• Link quality: Not all backlinks carry equal weight. A single link from a DA 80 publication is worth more to your score than dozens of links from DA 10 directories. Moz evaluates the authority of the sites linking to you and weights your score accordingly.
• MozRank: A measure of your site's overall link popularity, based on both the quantity and quality of inbound links. Think of it as a signal of how widely referenced your domain is across the web.
• MozTrust: A score measuring how close your domain is to trusted seed sites, authoritative sources like major universities, government sites, and established news outlets. Sites with links from trusted sources inherit some of that trust signal.
• Spam score: Moz also evaluates the quality of your backlink profile for patterns associated with spammy or manipulative linking. A high spam score can drag down your DA even if you have a large number of links. You can check your domain's spam score and domain blacklist status free on SEO Site Checker.

Moz refreshes DA scores approximately every 3 to 4 weeks. Your score can fluctuate between updates even if you have not actively built or lost links, because DA is recalculated relative to every other site in Moz's index simultaneously.

What Metrics Does the SEO Site Checker DA Tool Return?

Results appear in a table with five columns for every domain you check:

• Domain or URL: The domain you entered, confirmed in the results row for easy reference when checking multiple domains.
• Domain Authority (DA): The site-wide score from 0 to 100 predicting overall ranking potential, based on the strength and diversity of the domain's backlink profile as calculated by Moz.
• Page Authority (PA): The authority score for the specific URL entered, on the same 0-100 scale. Reflects the ranking strength of that individual page rather than the entire domain.
• MozRank (MR): A link popularity score reflecting how widely referenced and linked-to the domain is across the web.
• Linking: The number of external links pointing to the domain. This gives you a raw count of inbound links as a supporting data point alongside the DA score.

What Is a Good Domain Authority Score?

This is the question almost every DA checker user asks first, and the honest answer is that there is no universal benchmark. A good score is one that is comparable to or higher than the competitors you are actually trying to beat.

That said, here is a practical framework for interpreting where a score puts you:

• DA 1-10: A new or very recently launched domain with minimal backlinks. This is completely normal for any site in its first six to twelve months. It does not indicate a problem, just an absence of established link equity.
• DA 11-25: Early-stage site beginning to build credibility. Some backlinks are in place, but the link profile lacks depth or diversity. Ranking for competitive keywords is difficult at this range.
• DA 26-40: A small to mid-sized business with an established online presence and a growing backlink profile. Competitive in local and niche markets. This is where most small businesses and active bloggers land after one to three years of consistent SEO effort.
• DA 41-60: Well-established site with strong, diverse backlinks. Competitive across most industries for mid-difficulty keywords. Agencies, established media sites, and successful e-commerce brands often sit in this range.
• DA 61-80: High-authority domain, typically reserved for well-known publications, long-running industry leaders, and brands with significant digital PR and content operations.
• DA 81-100: The top tier of the internet. Wikipedia, YouTube, Amazon, the New York Times. These scores are not realistic targets for most websites and chasing them would be counterproductive.

The practical approach: use this free domain authority checker to look up your top three to five competitors, the specific websites currently ranking on page one for the keywords you want. Their DA scores tell you the realistic authority level you need to compete. Focus on closing that gap, not on chasing an arbitrary number.

One final note: your DA score can drop even if you have done nothing wrong. Because DA is relative, if your competitors gain strong backlinks faster than you do, the overall distribution shifts and your score may fall. This is normal, not a penalty.

Domain Authority vs Page Authority (DA vs PA)

Domain Authority and Page Authority are both Moz metrics on the same 0-100 logarithmic scale, but they measure different things at different levels.

Domain Authority evaluates the entire domain or subdomain, every page, every backlink, the sum total of your site's link equity and credibility. It is a site-wide score.

Page Authority evaluates a specific page URL, how likely that individual page is to rank in search results based on the links pointing directly to it and its internal link equity.

A site can have a high DA and still have individual pages with low PA, especially if those pages are new, have few internal links pointing to them, or have attracted no external backlinks of their own. Conversely, a single high-performing page on a lower-DA domain can have a PA that competes with pages on stronger sites if it has earned enough targeted links.

When to use each: Use DA when comparing whole websites in competitive research, vetting link prospects, or measuring your site's overall growth trajectory. Use PA when evaluating the strength of a specific landing page, blog post, or link source for a targeted campaign.

Domain Authority vs Domain Rating vs Authority Score

Moz's DA is the original and most widely referenced website authority metric, but it is not the only one. If you have used Ahrefs or Semrush, you have seen their own equivalents, and it is important to understand they are not interchangeable.

Moz Domain Authority (DA): The industry's original metric, introduced in 2004. Primarily evaluates backlink profile quality, linking root domains, MozRank, and MozTrust. Updated every 3-4 weeks. The default when most SEOs say "domain authority."

Ahrefs Domain Rating (DR): Focuses specifically on the strength and quantity of unique referring domains using Ahrefs' own crawl index. DR tends to update faster than Moz DA. The same domain will often have a different DA and DR because they use different data sources.

Semrush Authority Score: The broadest of the three. Combines backlink quality, estimated organic traffic, and spam signals. A site with a strong backlink profile but weak organic traffic may score higher in Moz than in Semrush. Semrush's metric is designed to penalise link manipulation more aggressively.

The key takeaway: do not compare a Moz DA of 45 against an Ahrefs DR of 45 as if they are the same measurement. Each tool uses a different index and different weighting. Choose one tool, use it consistently, and track your score over time with the same source. For side-by-side competitor comparison with the industry-standard metric, DA is the benchmark most SEOs and agencies reference. For a more direct look at how your approach compares to full-suite paid platforms, see how SEO Site Checker compares to Semrush.

How to Use the Domain Authority Checker

Step 1: Enter the domain. Type or paste the full URL into the input field, including https:// - for example, https://yourblog.com or https://competitorsite.com.

Step 2: Run the check. Click the Check button. Results appear within seconds in a table showing Domain Authority (DA), Page Authority (PA), MozRank (MR), and Linking count for the domain you entered.

Step 3: Benchmark your competitors. Run the same check on the top three to five sites ranking on Google for your target keywords. Note their DA scores. This gives you a realistic target range for your own site.

Step 4: Check your own site. Enter your own domain and compare your DA to the competitor benchmarks you just recorded. The gap between your score and theirs tells you how much authority-building work lies ahead.

Guests can run up to 5 checks per day, one at a time. Create a free SEO Site Checker account (no credit card required) to check up to 10 domains per day, 5 at a time.

For a deeper technical picture of any domain you are researching, pair this tool with the WhoIs Lookup to check registration history and ownership details.

5 Practical Ways to Use a Domain Authority Checker

Most people check their DA score once, nod at the number, and move on. That is leaving most of the tool's value on the table. Here are the five ways experienced SEOs and marketers actually put a DA checker to work.

1. Competitor benchmarking before you build your SEO strategy. Before you invest time in content, link building, or any organic strategy, run a DA check on every site ranking on page one for your primary target keywords. Their DA scores give you an honest picture of the authority gap you need to close. Walking into an SEO campaign without this benchmark is like running a race without knowing the distance.
2. Vetting link building prospects. Before spending time on a guest post pitch, directory submission, or partnership request, check the target site's DA. A link from a DA 12 site with a high spam score does almost nothing for your authority, and can sometimes work against you. As a practical rule of thumb, target sites with a DA higher than your own for outreach, and set a minimum floor (DA 30 is a reasonable starting point for most niches) below which you will not pursue links.
3. Monthly progress tracking. Record your DA at the same time each month. A steadily rising score over six to twelve months confirms that your backlink-building efforts are compounding correctly. A sudden drop is worth investigating, it may signal lost backlinks, a Moz algorithm update, or competitors accelerating their own link acquisition faster than you.
4. Domain acquisition research. Before buying an expired domain or purchasing an existing website, always run a DA check alongside a spam score check. An expired domain with an inflated DA from link schemes will drop sharply once Moz reprocesses it. Check the domain's blacklist status and review the WhoIs registration history before making any acquisition decision.
5. Content partnership and sponsorship vetting. If another site approaches you for a content collaboration, newsletter swap, or co-marketing opportunity, their DA score is a quick proxy for whether their audience and authority are worth your time. It does not tell the whole story, but a DA check takes thirty seconds and can save you hours on partnerships that will not move the needle.

How to Improve Your Domain Authority

Improving DA is not a quick win, it is a compounding, long-term effort. The tactics below are proven, sustainable, and happen to align directly with what Google rewards independently of any DA score.

Build backlinks from unique referring domains. This is the single most impactful lever. Focus on earning links from websites you have never received a link from before. Effective methods include guest posting on relevant industry publications, digital PR campaigns that generate media coverage, creating free tools or original research that others naturally cite, and earning resource page listings in your niche. Each new referring domain adds more to your DA than additional links from a domain that already links to you.

Audit and remove toxic backlinks. A high spam score from low-quality, irrelevant, or manipulative backlinks actively suppresses your DA. Run a backlink audit at least quarterly. For links you cannot get removed by contacting the webmaster, use Google's Disavow Tool to prevent them from being counted against your profile. Cleaning a spammy link profile often produces a faster DA improvement than building new links.

Create content that earns links naturally. Free tools, original research with real data, comprehensive industry guides, and statistical roundups are the content formats that generate the most organic backlinks over time. If your site only has product pages and blog posts restating common knowledge, other sites have no reason to link to you. Give them a compelling reason, a resource so useful they reference it for years.

Strengthen your technical SEO foundation. Broken internal links waste crawl budget and leak link equity. An outdated XML sitemap means Google and Moz's crawlers may miss important pages entirely. Canonical tags prevent duplicate content from diluting your authority. Fixing these issues will not directly raise your DA score, but they ensure that the authority you build through links is distributed efficiently across your site. Run a full website SEO audit to surface these issues quickly.

Build a strong internal linking structure. Internal links pass link equity from your highest-authority pages to newer or lower-PA pages across your site. A well-structured internal linking strategy means that a strong backlink to your homepage also lifts the Page Authority of your deeper content pages, accelerating the overall rise in your domain's authority over time.

Be consistent and patient. DA is a marathon metric. The logarithmic scale means that gains become progressively harder as you climb. Expect meaningful movement over six to twelve months with consistent effort, not weeks. Set a realistic goal, match your weakest top-three competitor's DA within twelve months,and track monthly. Fluctuations are normal; the trend over time is what matters.

Why Domain Authority Is Not a Google Ranking Factor: But Still Matters

Google's representatives, including John Mueller, have confirmed on multiple occasions that Moz's Domain Authority is not used in Google's ranking algorithm. Google has no access to Moz's proprietary data, and it does not incorporate third-party authority scores into its systems.

So why does every serious SEO professional still track it?

Because DA and Google rankings are both downstream of the same underlying inputs. The activities that raise your DA, earning quality backlinks from reputable sites, publishing authoritative content, building a trustworthy domain profile are the exact same activities Google rewards with higher rankings. The correlation between DA and organic search performance is strong and well-documented across millions of domains.

Think of DA as a proxy metric, a single number that summarises the health of your site's authority and competitive position. It does not tell you where you will rank for any specific keyword. It does tell you whether your site has the foundational authority to compete for the keywords you are targeting. A site with DA 18 trying to rank for a keyword where every page-one result has DA 55+ will struggle regardless of how well the individual page is optimised.

For reporting and goal-setting, DA has another practical advantage: it is a clean, single number that clients, stakeholders, and team members can track over time without needing to understand the mechanics of backlink indexing. Use it as one KPI among several, alongside organic traffic, keyword rankings, and conversion data, and it becomes genuinely useful for measuring SEO momentum.

Other Free Domain Tools You Might Need

After checking domain authority, the next step for most users is a deeper domain investigation. Use the WhoIs Lookup to check registration dates, registrar details, and DNS records for any domain, useful for competitor research and domain acquisition. The Blacklist Checker confirms whether a domain appears on any email or web blacklists, which can affect both deliverability and search trust signals. For a complete picture of a domain's technical health, run a full website SEO audit, it surfaces the on-page and technical issues that directly affect your site's ability to earn and retain authority. You can also check the domain hosting details of any site to identify its hosting provider and server configuration.