What Is Domain Authority?

Domain Authority (DA) is a search engine ranking score developed by Moz that predicts how likely a website is to rank in search engine result pages (SERPs). The score ranges from 1 to 100, with higher scores indicating greater ranking potential and overall website strength. Domain Authority is calculated by evaluating multiple factors, including the total number of backlinks, the quality of linking root domains, and other proprietary metrics. Our free Domain Authority checker instantly analyzes any website’s DA score along with additional SEO metrics to help you assess website strength for competitive analysis, link building, and SEO strategy.

How to Check Domain Authority

Checking a website’s Domain Authority is simple with our free tool:

Step 1: Enter the Domain Type or paste the domain name you want to analyze (e.g., example.com) into the input field above. You don’t need to include “https://” or “www.”

Step 2: Click “Check Authority” Hit the check button and our tool will instantly query multiple data sources to retrieve the domain’s authority metrics.

Step 3: Analyze the Results Review the Domain Authority score along with additional metrics like backlink count, referring domains, and spam score. Use these insights to inform your SEO strategy.

Understanding Domain Authority Scores

Domain Authority scores range from 1 to 100. Here’s how to interpret what your score means:

DA Score Ranges

Important Context About DA Scores

Domain Authority is best used as a comparative metric rather than an absolute measure. A DA of 30 might be excellent in a niche with low competition, while the same score could be below average in highly competitive industries.

New websites typically start with a DA of 1 and build authority over time through quality content and backlink acquisition. It’s completely normal for new sites to have low DA scores—what matters is consistent growth over time.

What Our Domain Authority Checker Analyzes

Our comprehensive DA checker provides multiple metrics to give you a complete picture of website authority:

Domain Authority (DA)

Moz’s proprietary score predicting ranking potential on a 1-100 scale. This is the primary metric for assessing overall domain strength.

Total Backlinks

The complete count of inbound links pointing to the domain from other websites. More backlinks generally correlate with higher authority, though quality matters more than quantity.

Referring Domains

The number of unique websites linking to the domain. This metric is often more valuable than total backlinks because it shows how many different sources consider the site worthy of a link.

Dofollow vs Nofollow Links

The breakdown between links that pass SEO value (dofollow) and those that don’t (nofollow). A healthy backlink profile includes both types, though dofollow links have more impact on authority.

Spam Score

Moz’s assessment of how likely a site is to be penalized or banned by search engines. High spam scores indicate potentially problematic backlink profiles or other red flags.

Referring IPs and Subnets

Diversity metrics showing how many unique IP addresses and subnets link to the domain. Greater diversity typically indicates a more natural, authoritative backlink profile.

Domain Authority vs Page Authority: What’s the Difference?

While Domain Authority measures the ranking strength of an entire domain, Page Authority (PA) measures the strength of individual pages. Understanding both metrics provides a more complete SEO picture.

Domain Authority

• Measures the entire website’s ranking potential
• Influenced by the site’s overall backlink profile
• Takes longer to improve
• Affects all pages on the domain

Page Authority

• Measures a specific page’s ranking potential
• Influenced by links pointing directly to that page
• Can change more quickly
• Independent of other pages on the same domain

A website might have high Domain Authority but individual pages with lower Page Authority if those pages haven’t acquired many direct backlinks. Conversely, a viral page could have high PA even on a lower-DA domain.

Domain Authority vs Domain Rating: Understanding Different Metrics

Different SEO tools use different authority metrics, which can cause confusion. Here’s how the major metrics compare:

Moz Domain Authority (DA)

• Scale: 1-100
• Provider: Moz
• Based on: Link equity, linking root domains, total links
• Updated: Regular index updates

Ahrefs Domain Rating (DR)

• Scale: 1-100
• Provider: Ahrefs
• Based on: Backlink profile strength, link quality
• Updated: Continuous crawling

Semrush Authority Score

• Scale: 1-100
• Provider: Semrush
• Based on: Backlinks, organic traffic, spam signals
• Updated: Regular updates

While these metrics use similar scales, they’re calculated differently and shouldn’t be directly compared. A site might have DA 45, DR 52, and Authority Score 48 simultaneously. Choose one metric and use it consistently for your analysis.

How Is Domain Authority Calculated?

Moz calculates Domain Authority using a machine learning algorithm that evaluates numerous factors. While the exact formula is proprietary, these are the primary components:

Linking Root Domains

The number of unique domains linking to your website is the strongest factor in DA calculation. Earning links from many different websites signals authority more than multiple links from the same source.

Total Link Count

The overall number of backlinks pointing to your domain, though this is weighted less heavily than linking root domain diversity.

MozRank and MozTrust

Moz’s proprietary metrics measuring link popularity and trustworthiness based on the quality of linking sites.

Spam Factors

Sites exhibiting spammy characteristics or linked to by suspicious sites may see DA penalties.

Site Age and Content

While not primary factors, established sites with quality content tend to accumulate the backlinks that drive higher DA.

How to Improve Your Domain Authority

Increasing Domain Authority requires consistent effort over time. Here are proven strategies that work:

1. Create Link-Worthy Content

Develop comprehensive, original content that other websites want to reference and link to. This includes:

• Original research and data studies
• Comprehensive guides and tutorials
• Useful tools and calculators
• Infographics and visual content
• Expert interviews and insights

2. Build Quality Backlinks

Focus on earning links from relevant, authoritative websites in your industry:

• Guest posting on reputable blogs
• Digital PR and journalist outreach
• Broken link building campaigns
• Resource page link building
• Creating linkable assets

3. Improve Internal Linking

A strong internal linking structure helps distribute authority throughout your site:

• Link from high-authority pages to important pages
• Use descriptive anchor text
• Ensure all important pages are accessible within a few clicks

4. Remove Toxic Backlinks

Low-quality or spammy backlinks can hurt your authority:

• Regularly audit your backlink profile
• Identify suspicious or low-quality links
• Use Google’s Disavow Tool when necessary

5. Ensure Technical Excellence

Technical SEO issues can limit your authority potential:

• Fix crawl errors and broken links
• Improve site speed and performance
• Ensure mobile-friendliness
• Implement proper redirects

6. Be Patient and Consistent

Domain Authority changes slowly. Focus on sustainable, long-term strategies rather than quick fixes. Expect noticeable improvements over months, not days.

Common Uses for Domain Authority Checking

Understanding when and why to check Domain Authority helps you get the most value from this metric:

Competitive Analysis

Compare your DA to competitors to understand your relative position in the market. If competitors have significantly higher DA, you may need to invest more heavily in link building.

Link Building Outreach

When prospecting for link opportunities, DA helps you prioritize targets. Generally, links from higher-DA sites provide more value than links from lower-DA sites.

Website Acquisition

Before purchasing a domain or website, check its DA to assess its existing authority and SEO value. Be wary of sites with unnaturally high DA for their size or niche.

Progress Tracking

Monitor your DA over time to gauge the effectiveness of your SEO efforts. Steady growth indicates your strategies are working.

Client Reporting

Agencies often include DA in client reports as an easy-to-understand metric for overall SEO progress.

Content Partnership Evaluation

When considering guest posting opportunities or content partnerships, DA helps assess the potential SEO value.

Limitations of Domain Authority

While DA is a valuable metric, understanding its limitations prevents misuse:

DA Is Not a Google Metric

Google does not use Domain Authority in its ranking algorithm. DA is a third-party prediction of ranking potential, not a direct ranking factor.

DA Can Be Manipulated

Unethical tactics can artificially inflate DA through low-quality link schemes. Always evaluate sites holistically, not just by DA score.

DA Doesn’t Guarantee Rankings

A higher DA doesn’t automatically mean better rankings. Relevant, high-quality content optimized for specific keywords often outranks higher-DA competitors.

New Sites Start Low

Low DA doesn’t mean a site is bad—new websites naturally have low scores. Focus on the trajectory of growth rather than absolute numbers.

Different Tools Show Different Scores

As mentioned, various SEO tools calculate authority differently. A site’s Moz DA may differ significantly from its Ahrefs DR.

Frequently Asked Questions

What is a good Domain Authority score?

A “good” Domain Authority score depends on your industry and competition. Generally, DA 40-50 is considered average, DA 50-60 is good, and DA 60+ is excellent. However, in less competitive niches, DA 30-40 might be sufficient to rank well. Compare your score to direct competitors rather than using absolute benchmarks.

Is Domain Authority a Google ranking factor?

No, Domain Authority is not a Google ranking factor. DA is a metric created by Moz to predict ranking potential, but Google does not use it in their algorithm. Google has their own internal metrics for assessing site quality and authority that are not publicly disclosed.

How long does it take to increase Domain Authority?

Increasing Domain Authority typically takes 3-6 months of consistent effort to see noticeable changes. DA is calculated on a logarithmic scale, meaning it becomes progressively harder to improve as your score increases. Building from DA 20 to 30 is easier than building from DA 50 to 60.

Why did my Domain Authority drop?

DA can drop for several reasons: Moz updated their algorithm or index, you lost backlinks from authoritative sites, competitors gained more links (DA is relative), or spammy sites started linking to you. Check your backlink profile for lost links or new toxic links if you see a significant drop.

Can I check Domain Authority for free?

Yes, our Domain Authority checker is completely free with no registration required. You can check any domain’s DA score instantly along with additional metrics like backlinks, referring domains, and spam score.

How often is Domain Authority updated?

Moz updates Domain Authority scores approximately once per month when they refresh their link index. However, the timing can vary, and not all sites are updated simultaneously. Regular checking helps you track changes over time.

What’s the difference between Domain Authority and Page Authority?

Domain Authority measures the ranking strength of an entire domain or website, while Page Authority measures the strength of a specific individual page. Both use the same 1-100 scale, but DA is influenced by the site’s overall backlink profile while PA focuses on links to that specific page.

Is higher Domain Authority always better?

While higher DA generally indicates stronger SEO potential, it’s not the only factor that matters. A page on a DA 40 site with highly relevant, quality content can outrank a page on a DA 70 site with mediocre content. DA is one of many factors to consider.

How do I check my competitor’s Domain Authority?

Enter your competitor’s domain into our free DA checker above. You can check unlimited domains to compare authority scores, backlink counts, and other metrics. This helps you understand your competitive position and identify link building opportunities.

Does buying backlinks improve Domain Authority?

Buying backlinks violates Google’s guidelines and can result in penalties. While purchased links might temporarily increase DA, they often come from low-quality sources that can hurt your site long-term. Focus on earning links through quality content and legitimate outreach.

Start Checking Domain Authority Now

Understanding Domain Authority is essential for competitive analysis, link building strategy, and tracking SEO progress. Our free Domain Authority checker gives you instant access to DA scores and comprehensive backlink metrics for any website.

Whether you’re evaluating competitors, prospecting for link opportunities, or monitoring your own site’s growth, accurate authority data helps you make smarter SEO decisions. Enter any domain above to get started—no registration required, unlimited checks, instant results.