How to Check Website Domain Authority: A Complete Guide
Domain Authority (DA) is one of those metrics that gets mentioned constantly in SEO conversations — but checking it correctly, and understanding what the number actually means, trips up a lot of people. Here's what you need to know.
What Is Domain Authority?
Domain Authority is a score — typically on a scale of 1 to 100 — that predicts how likely a website is to rank in search engine results pages (SERPs). A higher score generally indicates a stronger, more authoritative domain.
One important clarification: DA is not a Google metric. It was developed by Moz as a proprietary scoring system. Other SEO tool providers have created their own equivalents:
- Moz → Domain Authority (DA)
- Ahrefs → Domain Rating (DR)
- Semrush → Authority Score
- Majestic → Trust Flow and Citation Flow
Each uses its own algorithm, so scores across platforms will differ for the same website. This isn't a flaw — it's just a reflection of different methodologies.
How Domain Authority Is Calculated
Every tool weights its inputs differently, but the core ingredients are broadly similar:
- Backlink quantity — How many external sites link to the domain
- Backlink quality — The authority of the sites doing the linking
- Linking root domains — How many unique domains point to the site (not just total links)
- Spam signals — Indicators of low-quality or manipulative link patterns
The score is logarithmic, not linear. Moving from DA 20 to DA 30 is relatively achievable. Moving from DA 70 to DA 80 is significantly harder because you're competing with fewer, larger sites at that tier.
How to Check Domain Authority 🔍
Using Free Tools
Moz Link Explorer is the most direct way to check DA specifically. You can enter any domain at moz.com/link-explorer and see the score without creating an account — though free checks are rate-limited.
Ahrefs Free Webmaster Tools gives you access to DR for sites you own and verify through Google Search Console.
Semrush's free tier allows a limited number of domain lookups per day, returning its Authority Score along with backlink data.
Browser extensions from both Moz (MozBar) and Semrush can display DA/Authority Score directly in search results as you browse — useful for quickly comparing competitors while doing research.
Using Paid Platforms
Paid subscriptions unlock bulk checking, historical tracking, and deeper backlink analysis. If you're managing multiple sites or running competitive audits regularly, this matters. Most paid plans let you:
- Check hundreds of domains in a single CSV upload
- Monitor DA changes over time
- Compare a domain's profile against competitors side by side
Checking Competitors' DA
You don't need to own a site to check its DA. Any of the tools above work for any public domain. This is standard practice in competitive SEO — understanding where your site sits relative to others in your niche gives context to your own score.
What the Numbers Actually Mean
| DA Range | General Interpretation |
|---|---|
| 1–20 | New or very low-authority site |
| 21–40 | Developing authority, limited backlink profile |
| 41–60 | Moderate authority, some established presence |
| 61–80 | Strong domain, broad backlink profile |
| 81–100 | Major publishers, established brands, dominant platforms |
These ranges are rough benchmarks, not guarantees of ranking performance. A DA 35 niche site can outrank a DA 60 general site on specific keyword searches because topical relevance, content quality, and on-page SEO all factor into actual rankings — DA does not.
Common Mistakes When Interpreting DA
Treating DA as a Google ranking signal. It isn't. Google has confirmed it does not use Moz DA or any third-party authority score in its algorithm. DA is a predictor of ranking potential, not a direct input.
Comparing scores across different tools. A site's Moz DA of 45 and its Ahrefs DR of 38 are measuring related but distinct things. Comparing them directly is like comparing two different shoe size systems — the number alone doesn't tell you much without knowing the scale.
Expecting DA to update quickly. Most tools recalculate DA periodically — Moz updates its index roughly monthly. A surge in new backlinks won't immediately show up as a score increase.
Ignoring the niche context. A DA of 30 in a highly competitive financial services niche is a very different situation than a DA of 30 in a narrow hobbyist community. What counts as "good" is always relative to who you're competing against. 🎯
Variables That Affect Your Results
How useful any DA check is depends on several factors specific to your situation:
- Your niche and competitors — The relevant DA benchmark changes completely depending on your competitive landscape
- Your goal — Vetting a potential link partner, auditing your own site, or analyzing a competitor each calls for slightly different data points
- Which tool you're using — The same domain can have meaningfully different scores across platforms
- How frequently you check — A one-time snapshot versus ongoing tracking are two different use cases
- Whether you own the site — Ownership unlocks deeper free-tier access on some platforms
A freelance content creator checking one competitor's DA once a month has entirely different needs than an in-house SEO team running weekly audits across a portfolio of 50 domains. The tools, the cadence, and the thresholds that matter shift significantly depending on that context. 📊
How much weight you give DA — and which platform's version you trust — ultimately comes down to how it fits into your broader SEO workflow and what decisions you're actually trying to make.