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Domain Authority Checker

Check any domain's Moz Domain Authority instantly — plus Page Authority, Spam Score, and linking root domains. Real Moz data, free, right on the page.

// your details

Powered by the Moz Links API. Free; results return in a few seconds.

// what the number means

Domain Authority, decoded.

Domain Authority (DA) is a 0–100 score from Moz that predicts how well a website can rank in search results, based largely on its backlink profile. It's a comparative signal — not a number Google uses directly — but it's one of the most widely cited ways to benchmark a site's ranking strength against its competitors. Because the scale is logarithmic, climbing from 20 to 30 is far easier than moving from 70 to 80.

The number you get above comes straight from the Moz Links API, alongside Page Authority, Spam Score, and the count of unique domains linking to the site. Read them together: a strong DA with a high Spam Score, for instance, is a very different story than a strong DA with a clean profile.

// reading the score

Where your domain lands.

DA is relative, so the right benchmark is always the sites you compete with — but these bands give a quick sense of where a domain sits and what to prioritize next.

60–100

Strong

Established, trusted domains. Ranking competitively here usually takes real authority and a deep link profile of your own.

30–59

Moderate

A healthy, growing site. Consistent content and steady link-building move this band fastest — it's where most businesses live.

0–29

Developing

New or thin link profiles. Focus on earning a handful of quality, relevant links before chasing volume.

// what actually moves it

What drives Domain Authority.

DA is almost entirely a function of your backlink profile. These are the levers that move it — and the ones worth your attention before chasing the score itself.

Linking root domains

The number of unique websites linking to you matters far more than raw link count. Ten links from ten sites beat a hundred from one.

biggest lever

Link quality & relevance

A link from a trusted, topically-relevant site carries real weight. Links from spammy or unrelated domains carry little — or hurt.

quality > quantity

Spam Score

Moz's read on how many spam signals your link profile shares with penalized sites. A high score can drag authority and rankings down.

keep it low

Link velocity & age

Authority compounds over time. A natural, steady pace of new links from real sites signals genuine growth to search engines.

compounds

Internal linking

How you distribute authority across your own pages affects Page Authority. Strong internal structure helps every page rank.

structure

Lost & toxic links

Links disappear and bad ones accumulate. Auditing and disavowing toxic links protects the authority you've built.

maintenance
// faq

Domain Authority questions, answered.

What is Domain Authority (DA)?
Domain Authority is a 0–100 score, developed by Moz, that predicts how likely a website is to rank in search engine results. It's calculated from a domain's link profile — primarily the quantity and quality of other sites linking to it. A higher DA suggests a stronger ability to rank. It is a comparative, third-party metric, not a score Google itself uses.
Is this a real Domain Authority score?
Yes. This tool queries the official Moz Links API and returns Moz's genuine Domain Authority, Page Authority, and Spam Score for the domain you enter — the same numbers you'd see inside Moz Pro. We don't estimate or approximate it.
What's a good Domain Authority?
DA is logarithmic and relative, so it's easier to grow from 20 to 30 than from 70 to 80. There's no universal 'good' number — it depends on your niche. The useful comparison is against the sites you actually compete with in search. If your DA is in the same range as the pages ranking on page one for your keywords, you're competitive.
What's the difference between Domain Authority and Page Authority?
Domain Authority (DA) predicts the ranking strength of an entire domain, while Page Authority (PA) predicts the ranking strength of a single page. Both run on a 0–100 scale using Moz's link data. A high-DA site can still have low-PA pages (and vice versa), which is why both numbers are worth watching.
What is Spam Score?
Spam Score is Moz's measure of how many spam signals a site's link profile shares with sites that have been penalized or banned. It's shown as a percentage — lower is better. A high Spam Score doesn't automatically mean a site is spam, but it's a flag worth investigating, especially before acquiring links from a domain.
How do I increase my Domain Authority?
DA follows links. The durable way to raise it is to earn high-quality, relevant backlinks from trusted domains over time — through genuinely useful content, digital PR, and outreach — while keeping your own technical SEO clean and pruning toxic links. There's no shortcut; buying low-quality links typically raises Spam Score and backfires. That's exactly the work our link-building and SEO programs handle.
Want to actually raise your DA?
Domain Authority follows links. Our link-building program earns the high-quality, relevant backlinks that move the number.
See link building