What domain authority is and why it matters
Domain authority is a score that predicts how likely your website is to rank in search results. It runs from 1 to 100, with higher numbers meaning search engines treat your site as more trustworthy. The score is calculated by third-party tools — not by Google itself — and it looks at things like how many other websites link to yours, how old your domain is, and how consistent your content quality appears to be.
Domain authority matters because it gives you a rough sense of where your website stands compared to competitors. If your site has a score of 15 and a competitor's site has a score of 45, the competitor will usually rank higher for the same search term, all else being equal. Knowing your own score helps you understand what kind of ranking difficulty you are facing and whether you need to build more credibility before targeting certain keywords.
The score is not a Google metric. Google does not publish domain authority numbers. Instead, tools like Moz, Ahrefs, and SEMrush created their own versions based on their own data about links and site behavior. This means different tools will give you slightly different numbers for the same domain — that is normal.
Key Takeaways
- Domain authority is a 1-to-100 score created by third-party tools, not by Google, and predicts how likely your site is to rank in search results.
- Moz's Domain Authority tool, Ahrefs' Domain Rating, and SEMrush's Authority Score are the most widely used versions, and each uses slightly different methods so scores will not match.
- You can check your domain authority for free using Moz's toolbar or by entering your domain into their free checker, though paid tools give you more detail about what is driving your score.
- Domain authority usually takes weeks or months to change noticeably because it depends on how many other sites link to you, and building those links takes time.
- A higher domain authority helps your site rank, but it is not the only factor — page-level content quality, keyword relevance, and user experience matter just as much.
How to check domain authority using free tools
The fastest way to check your domain authority is to use Moz's free Domain Authority checker. Go to moz.com/domain-analysis, type your domain name into the search box, and click the button. Within a few seconds you will see your domain authority score, along with a few other metrics like spam score and linking domains. You do not need to create an account or pay anything.
Ahrefs also offers a free domain checker at ahrefs.com/domain-checker. Enter your domain and you will see their version of domain authority, called Domain Rating, along with information about backlinks and referring domains. Like Moz, this requires no account or payment for the basic report.
If you use the Moz toolbar (a browser extension available for Chrome and Firefox), you can see domain authority scores for any website you visit without leaving the page. Install the extension, visit any website, and the toolbar shows the site's authority score in the corner. This is useful for quickly comparing your score to competitors while you browse.
These free tools show you the number itself, but they do not explain what is driving it. For that level of detail — which specific sites are linking to you, which of your pages are the strongest, where your competitors are getting their links — you need a paid tool.
Paid tools that give you more detail
Ahrefs, SEMrush, and Moz all offer paid plans that let you dig into why your domain authority is what it is. Ahrefs' paid version shows you every backlink pointing to your site, which domains are linking to you most, and how your backlink profile compares to competitors. SEMrush's paid plan includes similar backlink analysis plus keyword tracking and content audits. Moz's paid version (called Moz Pro) tracks your authority score over time and shows you which pages on your site are the strongest.
These tools cost between $100 and $500 per month depending on which one you choose and what features you need. For most small websites, the free versions are enough to see your score and understand whether you are moving in the right direction. You only need the paid version if you are actively trying to improve your ranking and want to know exactly which backlinks matter most.
All three tools update their scores on different schedules. Moz updates roughly monthly, Ahrefs updates more frequently, and SEMrush updates continuously. This means if you check your score today and check again tomorrow, you might see a different number — that is normal and does not mean your actual authority changed.
Why your domain authority might be low or not changing
New websites almost always start with a domain authority score between 1 and 10. This is not a problem — it just means the tools have not seen enough data about your site yet. As you publish content and other websites start linking to you, your score will climb. This usually takes months, not weeks.
If your score is stuck and not moving, the most common reason is that you do not have many backlinks. A backlink is a link from another website to yours. Search engines treat backlinks as votes of confidence, and the more you have, the higher your authority. If you have been publishing content for months and your score has not budged, you likely need to focus on getting other websites to link to you — through guest posts, partnerships, or by creating content that is so useful other sites want to reference it.
Another reason your score might not move is that you are comparing it to the wrong baseline. If you checked your score once six weeks ago and again today, you might not see a change because domain authority updates are not instantaneous. Check your score every month or two rather than every week. Over a three-month period you should see movement if you are actively building backlinks.
How domain authority relates to actual search rankings
Domain authority is a predictor, not a may provide. A site with a higher domain authority score will usually rank above a site with a lower score when both are targeting the same keyword. But "usually" is the key word — it is not absolute. A newer site with lower authority can still rank above an older site with higher authority if the newer site has better content, better user experience, or a more specific match to what people are searching for.
Think of domain authority as one piece of a much larger puzzle. Google's actual ranking system looks at hundreds of factors: the quality of your content, how long people stay on your page, whether your page answers the question someone typed, how fast your site loads, whether it works on mobile phones, and many others. Domain authority captures some of this — mainly the backlink part — but not all of it.
This means you should not obsess over your domain authority score. It is useful as a rough benchmark to see where you stand, but improving your actual rankings requires focusing on content quality, user experience, and relevance first. Domain authority will follow if you do those things well.
How to improve your domain authority over time
The primary way to improve domain authority is to earn backlinks from other websites. This happens when you create content that other people want to reference, when you write guest posts for other sites, when you partner with organizations in your field, or when you get mentioned in news articles or industry publications. There is no shortcut — you cannot buy your way to a higher score, and you cannot artificially inflate it without damaging your actual search rankings.
Focus on creating content that solves real problems for your audience. If your content is useful and specific, other websites will naturally want to link to it. This is slower than paying for links, but it is the only method that actually improves your standing with search engines.
Keep your site technically sound: make sure it loads quickly, works on mobile devices, and has a clear structure that search engines can understand. These factors do not directly affect domain authority, but they affect whether people link to you and whether search engines trust your site. A site that is fast and straightforward to use gets more links and more engagement, which eventually shows up in your authority score.
Frequently Asked Questions
Is domain authority the same as page authority?
No. Domain authority is a score for your entire website. Page authority is a score for a single page on your website. You can have a high domain authority but a low page authority for a specific page if that page is new or has few backlinks. Most tools show both scores so you can see which of your individual pages are the strongest.
Why do different tools give me different domain authority scores?
Each tool uses its own data and its own formula. Moz, Ahrefs, and SEMrush all crawl the web differently and count backlinks differently, so their scores will not match. This is normal. Pick one tool and check it consistently over time rather than comparing scores across different tools.
Can I check my domain authority without giving out my email address?
Yes. Moz's free checker and Ahrefs' free checker both let you see your score without creating an account. You just type your domain into the search box on their website. If you want to track your score over time or access more detailed reports, you will need to create an account.
How often should I check my domain authority?
Check it once a month or once every two months. Checking it more frequently will not give you useful information because the scores do not update daily. Over a three-month or six-month period you should see whether your score is moving in the right direction.
Does a high domain authority may provide I will rank in Google?
No. Domain authority is a predictor, not a may provide. A site with high authority can still rank poorly if its content is not relevant to what people are searching for. Conversely, a newer site with lower authority can rank well if it has better content and better user experience. Focus on creating good content first, and domain authority will improve as a result.