Domain Authority (DA) Checker Tool

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How Fastoola's domain authority checker tool works

Just enter the domain name(s) in text area provided above and press "submit" button. Using our free domain authority checker tool, you can check the authority of up to 20 domains in a single go.

We, at, don't assign authority to any domain as it is calculated and updated by Moz. We just retrieve the score from Moz's database using their API key and show it here for you. When you press the submit button, our tool sends a request to Moz's system which returns the DA score against each domain line you enter in our tool's text area.

Now, let's discuss what is domain authority and how you should target and achieve a DA score for your website or blog.

What is domain authority (DA)?

Domain authority (or DA, for short) is an SEO metric developed and periodically updated by a web analytics company Moz (formerly known as SEO Moz). This metric ranges from 1 to 100 and indicates the potential power or authority of a domain to rank in Google, Bing, and other link based search engines. In essence, a DA score of 1 represents the weakest possible authority and a score of 100 represents the strongest possible authority that a domain may have within its competitive landscape.

Domain authority score is not a part of any ranking algorithm. It, therefore, does not determine your position in actual search results of Google or Bing. The metric is aimed to just predict how well, or otherwise, a particular domain may perform in search results, compared to other domains. Generally speaking, the higher the DA score of a domain, the greater the likelihood that it will rank higher in a link based search engine.

The term domain authority applies to entire domain and not just a specific page of your website. However, if a domain has one or more subdomains, each of them will have their own separate DA score.

You should not confuse domain authority (DA) with domain rating (DR) which comes from Ahrefs - a direct competitor of Moz.

How to check your domain authority score

A domain authority checker tool can tell you the authority of any domain or subdomain. There are dozens of DA checker tools available on the internet that you can use free of charge. If you want to check the authority of multiple domains, it is better to get help with a bulk DA checker. A bulk DA checker can save your time because it is designed to retrieve score of more than one domain lines at a time. 

A single DA checker, on the other hand, can check the authority of only one domain at a time. To get score of another one, you need to repeat the process i.e., put the domain name in text area and press submit button again.

What you can do to improve your domain authority score

The calculation of domain authority is derived by a sophisticated machine learning model, which involves a number and complexity of factors. Achieving a higher DA score is therefore not a quick fix; it requires much of your time and attention. Since DA attempts to gauge your domain's potential SERPs performance, it must incorporate a set of similar factors that major search algorithms consider to rank pages. So, any practice that proves effective for improving your site's SEO health will also help you improve your DA score overtime.

SEO experts, and even Moz itself, suggest some common guidelines that you can follow to improve your DA score. We can broadly divide these guidelines into two groups - (i). inbound links and (ii). overall quality of website in question.

(i). The impact of inbound links

A newly registered domain always has a DA score of 1 which generally goes up as it publishes quality content and gets inbound links from authoritative domains overtime.

When it comes to links' role in domain authority, all incoming links don't equally contribute to the score. The concept is pretty logical and straightforward - the more you possess, the more you are able to transfer to others. In this sense, a domain's authority score is impacted more heavily by the links coming from high authority domains than ones that are not so authoritative. For example, a link from DA 80 domain would be much more influential than a link from DA 20 domain. In nutshell, the greater the number of authoritative inbound links, the greater the chances of getting a higher DA score.

Another important aspect of links that we can't ignore in this discussion is the total number of outbound links on a source domain (i.e., the domain that links to other domains, also known as linking domain). A general agreement among SEO experts is that the greater the number of outbound links on a source domain, the smaller the DA juice it passes to other domains.

The source domain splits its authority amongst the domains it links to. Hence, a DA 20 domain that links to only five other domains can impact your DA score more than a DA 50 domain that links to a hundred other domains. If you are not sure about the domain authority score of your source domains, our bulk domain authority checker tool can help you know that.

Finally, let your link profile grow organically. Use your time to generate unique, interesting and informative content and the rest will follow. Don't get involved in illegitimate link building practices. Link schemes, paid links, guest posts, substantial link exchanges and other similar tactics don't work anymore. Both search engines and Moz now continuously keep a track of your link pattern. They will devalue your site in their calculation if they detect any suspicious activity on part of your link profile. Websites that substantially acquired links from link networks lost their DA score after Moz implemented 2.0 version of its domain authority in March, 2019.

(ii). The impact of overall quality of the website

The overall quality of a website is generally based on two main components - the quality of your content and the structure in which your site's internal content pages are linked. When it comes to content quality, it is nothing other than what a particular visitor is looking for on your website. People like to read those pages that are clear concise and informative. If a page contains substantial amount of content, you must divided it into brief sections so that the visitors can quickly find the information they are searching for on your page.

In addition to content quality, your website must be easy to navigate - that is, the content pages within your website must be logically linked to each other.

The rich content along with better link structure constitute a good user experience and ultimately an amazing website, which benefits website owners and marketers in many different ways. For example, happy visitors often market websites for free by sharing their links on other websites, including social media platforms like Facebook, Twitter, LinkedIn, Instagram and YouTube etc. Moreover, authoritative websites happily link to other websites that add value to their own content, and help them increase their domain authority score.

How to use domain authority score and discuss it with your employees and clients?

Since domain authority comes from Moz - an independent web analytics company, it actually plays no role in ranking algorithm of any web search engine. The metric is best intended for predicting and comparing the potential ranking ability of various domains operating in a competitive environment.

The DA score is not an absolute value and should not be used in isolation for a single domain only. It is a relative measure that helps you predict how your domain may perform in SERPs, relative to your competitors. Your competitors, in this context, are those domains that compete you in SERPs for your targeted keywords or keyword phrases.

Since DA is best viewed as comparative measure rather than absolute value, You should not primarily aim for the highest possible score. The best idea to start is to recognize your close competitors in SERPs and compile them in a list. Once you have pointed out all of your competitors, check their domain authority scores one by one and target a score for your own domain that is higher than them. For this purpose, you can use our bulk domain authority checker tool for free.

Why does domain authority score change?

As stated earlier, Moz considers multiple factors to calculate and/or update the authority score of each domain in its index. It is, therefore, difficult to figure out what exactly caused a change in a particular domain's score. However, some core factors that could potentially impact your domain's authority score include:

  • a change in number and/or quality of inbound links to your domain,
  • a substantial change in link profiles of your competitors' domains,
  • your overall SEO efforts, including your inbound links, are no longer effective,
  • Moz has not yet fully captured your domain's link data,
  • implementation of DA 2.0 by Moz in 2019, which incorporated more factors into DA calculation and roughly decreased the score by 6% across all domains.

A fluctuation in domain authority does not directly reflect the improvements you make to your website or link profile. Your score may go down after an update or recalculation even if you have improved your website or gained new inbound links prior to the update or recalculation. The key to understand is that your authority score basically depends on comparison to others across the DA scale. Assume, for example, you currently have a DA score of 60. You improve both your website and link profile further, with the aim to achieve a higher than your current score in next update. Are you guaranteed to achieve a higher DA score than what you currently have, or even to maintain your current score of 60? The answer is a straight "no". The reason is that your domain does not operate in vacuum. It operates in a competitive environment and its DA score is determined in comparison to your competitors' domains.

Everyone has competitors who continuously strive for the best practices. What if some of your competitors bring about better changes to their websites than you do to yours, or their updated link profile becomes much more powerful than yours? Maybe the domains scoring 40 - 50 improved their link profile and other SEO aspects dramatically and a recalculation puts you down of them even though your domain now hosts a better website than ever.

How does domain authority differ from page authority?

Domain authority (DA) and page authority (PA) both come from Moz and both range from 1 to 100. Domain authority predicts the ranking ability of domain or subdomain as a whole whereas page authority predicts the ranking ability of an individual page. Page authority generally varies from page to page within a website. For example, if a website comprises of one hundred pages, each of them may have a different page authority. To check the authority of a site's specific page, we need to enter the full URL of that page in a page authority checker tool.