Domain Authority Checker Guide: What DA Scores Mean (2026)

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 on search engine results pages (SERPs). Scores run from 1 to 100 — higher numbers indicate a greater ability to rank. New websites start near 1. Sites like Wikipedia, Google.com, and Amazon hover near 100.

The score is logarithmic, which matters a lot in practice. Going from DA 20 to DA 30 is far easier than moving from DA 70 to DA 80. Each point near the top requires exponentially more high-quality backlinks than the point before it.

One critical point: DA is a third-party metric. Moz created it. Google does not use it. It’s a useful proxy for site authority, not a direct ranking signal — but the underlying inputs (backlinks from authoritative sites) absolutely do influence Google rankings.

How Moz Calculates Domain Authority

Moz’s DA algorithm incorporates dozens of signals, but the two primary inputs are:

• Linking root domains: The number of unique domains pointing to your site. One link from 100 different websites beats 100 links from the same website.
• Total number of links: The raw count of all inbound links, including internal and external.

Moz feeds these signals into a machine learning model trained to correlate with Google’s actual rankings. The model is recalibrated periodically, which can cause DA scores to shift even if your link profile hasn’t changed.

According to Moz’s 2024 DA documentation, the score is best used as a comparativemetric — comparing your score against competitors in the same niche — rather than as an absolute measure of SEO health.

What DA Score Ranges Mean (1–100 Breakdown)

Here’s how to interpret DA ranges in practice:

A 2023 study by Backlinkoanalyzing 11.8 million Google search results found a clear correlation between the referring domains pointing to a page and its Google ranking position. Pages with more referring domains consistently outranked those with fewer. Since referring domains are the core driver of DA, higher-DA sites tend to rank better — but correlation is not causation.

5 Proven Ways to Increase Domain Authority

DA is a lagging indicator — it moves slowly and reflects work you did months ago. These five strategies have the most direct impact on the factors Moz’s algorithm measures.

1. Earn Links from High-DA Domains

Not all backlinks are equal. One link from a DA 80 site (like a major news outlet) moves your score more than 50 links from DA 15 sites. Focus link-building efforts on getting featured in industry publications, being cited in research roundups, and earning editorial mentions rather than directory submissions.

2. Create Link-Worthy Content

Original research, comprehensive data studies, and free tools attract backlinks passively. According to Ahrefs’ 2023 Content Study, the top 10% of published articles earned 77% of all backlinks — largely because they contained unique data or tools other sites wanted to cite. One original survey or industry report can earn dozens of natural backlinks over its lifetime.

3. Fix Technical SEO and Internal Linking

Broken links bleed link equity. Internal links distribute authority from high-DA pages to lower-authority pages within your own site. A clean technical foundation (no crawl errors, fast load times, proper canonical tags) ensures Moz’s crawler can correctly assess your link profile.

4. Disavow Toxic Backlinks

Spammy links from low-quality link farms can drag DA down. Use Moz’s spam score feature to identify and disavow toxic links via Google Search Console. SEMrush’s 2024 Backlink Audit report found that sites actively managing their backlink profiles maintained DA scores 15-20 points higher than comparable sites ignoring link quality.

5. Build Consistent Referring Domain Velocity

Earning 2-3 new referring domains per month consistently outperforms burst campaigns that earn 50 links in a week and then nothing for months. Moz’s algorithm rewards steady link acquisition patterns over time. Tactics include guest posting, podcast appearances, HARO (Help a Reporter Out) responses, and broken link building.

Top 10 Factors That Influence DA Score

While Moz doesn’t publish its full algorithm, SEO research and Moz’s own documentation confirm these factors carry the most weight:

1. Number of unique referring domains — the single biggest driver
2. Quality/authority of linking domains — a link from The New York Times is worth far more than a link from a random blog
3. Anchor text diversity — natural mix of branded, naked URL, and keyword anchors
4. Link spam score — low-quality links hurt DA; disavow them
5. Root domain age — older domains with consistent link profiles tend to have higher DA
6. Total inbound links — raw count matters, but less than unique referring domains
7. Internal link structure — distributes authority across pages on your domain
8. Link growth velocity — consistent acquisition over time vs. unnatural spikes
9. Social signals — minor factor; highly shared content tends to attract backlinks
10. Content depth and topical authority — sites known as authorities in a niche earn more editorial links

Domain Authority by Industry: Average Scores

Average DA scores vary dramatically by industry. According to Moz’s 2024 industry benchmark data:

The takeaway: a DA of 35 might be excellent for a local HVAC company and mediocre for a fintech startup. Always benchmark against your direct competitors, not against industry averages that include billion-dollar brands.

Domain Authority vs. Domain Rating vs. Authority Score

Three major SEO tools each have their own version of this metric:

• Domain Authority (DA) — Moz’s metric. Updated roughly monthly. Most widely referenced in the industry.
• Domain Rating (DR) — Ahrefs’ metric. Based on their link index, which is widely considered the largest. Often used for link prospecting.
• Authority Score (AS) — SEMrush’s version. Incorporates organic traffic estimates alongside link data, making it slightly more holistic.

Scores will differ between tools because each crawls different portions of the web and weights signals differently. Pick one tool and stick with it for consistent tracking. Switching between tools mid-campaign makes it impossible to measure real progress.

Common DA Myths Debunked

Myth: Buying links will quickly boost my DA

Paid links from link farms are flagged as spam by Moz and devalued. Worse, Google’s manual action team actively penalizes sites with unnatural link patterns, which would hurt your actual rankings regardless of what DA shows. According to a 2024 Ahrefs study, 66% of pages have zero backlinks — the ones that rank well earned links through genuine content and outreach.

Myth: High DA guarantees first-page rankings

DA measures domain-level authority, not page-level relevance. A DA 70 site can still lose to a DA 45 site on a specific query if the lower-DA page has better on-page optimization, stronger topical relevance, and better user engagement signals. DA is one factor in a complex system.

Myth: My DA dropped, so my SEO must be failing

Moz recalibrates the entire DA scale periodically. When they do, nearly every site on the web sees a DA shift. Always check whether competitors dropped at the same time — if they did, it’s a Moz update, not a problem with your site.

Frequently Asked Questions

What is a good Domain Authority score?

A good DA score depends entirely on your niche and competitors. For most small businesses and blogs, a DA of 30–40 is solid. DA 50+ is strong. DA 70+ puts you among major publications. The key is to be higher than your direct competitors — a DA of 35 beats a DA of 20 competitor regardless of absolute scale.

Does Domain Authority directly affect Google rankings?

No. Domain Authority is a third-party metric created by Moz — Google does not use it as a ranking factor. However, the underlying factors that drive DA (quality backlinks, referring domains) do correlate with Google rankings. High DA is a symptom of good SEO, not the cause of good rankings.

How long does it take to increase Domain Authority?

Realistically, expect 3–6 months to see meaningful DA movement when actively building backlinks. Moz recalculates DA roughly every 30 days. Going from DA 10 to DA 30 typically takes 6–12 months of consistent link building. Moving from DA 40 to DA 60 can take 12–24 months, as higher scores require exponentially more high-quality links.

What is the difference between Domain Authority (DA) and Domain Rating (DR)?

Domain Authority (DA) is Moz’s proprietary metric. Domain Rating (DR) is Ahrefs’ equivalent metric. Both measure link authority on a 1–100 logarithmic scale, but they use different algorithms and data sources. A site might have DA 45 and DR 52 — the scores often differ. Neither is more “correct”; use whichever tool your team prefers for consistent benchmarking.

How often does Domain Authority update?

Moz recrawls the web and updates DA scores approximately every 30 days. You won’t see daily fluctuations like Google rankings. After earning new backlinks, expect to wait 4–6 weeks before DA reflects those links. Moz also periodically recalibrates the entire DA scale, which can cause scores to shift without any change to your actual link profile.

Why did my Domain Authority drop?

DA can drop for several reasons: Moz recalibrated its scale (affecting many sites simultaneously), competitors in your space gained more links (making your relative position drop), you lost backlinks from sites that removed content or changed their link profiles, or Moz devalued certain links in an algorithm update. A drop doesn’t always mean something is wrong — check if competitors dropped too.