Domain Authority vs Domain Rating: Which SEO Metric Should You Trust?

"Our DA is 45 but our DR is 62—which one is right?" This is one of the most common questions in SEO. The answer is both, and neither. Domain Authority (DA) and Domain Rating (DR) measure different things using different methods, and understanding what each one actually tells you is the key to using them effectively.

What Is Domain Authority (DA)?

Domain Authority is MOZ's proprietary metric that predicts how likely a domain is to rank in search engine result pages (SERPs). It was introduced in 2010 and has become one of the most widely referenced SEO metrics.

How MOZ Calculates DA

DA is calculated using a machine learning model that correlates link data with actual ranking positions:

1. MOZ crawls the web and builds a link index (Link Explorer)
2. The algorithm analyzes multiple factors:
   • Number of linking root domains
   • Total number of inbound links
   • Quality of linking domains
   • MozRank and MozTrust scores
3. These factors are fed into a model trained on real Google search results
4. The model outputs a score from 1 to 100

The critical distinction: DA doesn't just measure links—it predicts ranking ability. The model is trained against actual search data, so it incorporates patterns that correlate with ranking success.

DA's Logarithmic Scale

DA uses a logarithmic scale, which means:

• Going from 10 to 20 is relatively easy — acquire a handful of quality backlinks
• Going from 30 to 40 requires significantly more effort
• Going from 70 to 80 requires an enormous increase in authority
• Going from 90 to 100 is nearly impossible for most sites

This mirrors how authority works in practice. The difference between a site with 100 referring domains and one with 1,000 is significant; the difference between 100,000 and 101,000 is negligible.

DA Update Frequency

MOZ updates Domain Authority scores approximately once per month when they recrawl their link index. This means your DA can remain static for weeks even after acquiring new backlinks.

What Is Domain Rating (DR)?

Domain Rating is Ahrefs' metric that measures the strength of a website's backlink profile. Introduced as an alternative to DA, it focuses exclusively on backlink data.

How Ahrefs Calculates DR

DR uses a proprietary algorithm based on the backlink graph:

1. Ahrefs crawls the web and builds its own link index
2. The algorithm evaluates:
   • Number of unique domains linking to the target site
   • The DR of those linking domains (recursive calculation)
   • How many other sites each linking domain points to (link dilution)
3. The score is normalized to a 0–100 scale

The critical distinction: DR measures raw backlink strength. It doesn't try to predict rankings—it simply quantifies how strong your link profile is relative to every other site in the Ahrefs index.

The Link Dilution Factor

One unique aspect of DR is how it handles link dilution. If a site with DR 90 links to 10 other sites, each linked site gets more DR benefit than if that same DR 90 site linked to 10,000 sites.

This means a backlink from a high-DR site that's selective about outgoing links is worth significantly more than one from a high-DR site that links to thousands of sites.

DR Update Frequency

Ahrefs updates Domain Rating on a near-daily basis as new links are discovered and indexed. Your DR can change day-to-day, making it more responsive to recent link building activity.

Key Differences: DA vs DR

Why Scores Differ for the Same Website

It's extremely common to see a site with DA 35 and DR 58—or DA 55 and DR 30. Several factors cause these discrepancies:

1. Different Link Indexes

MOZ and Ahrefs crawl the web independently. They discover different links at different times. A fresh backlink from a major site might appear in Ahrefs within 24 hours but take weeks to show up in MOZ's index.

2. Different Algorithms

DA incorporates ranking prediction, while DR is purely link-based. A site with mediocre links but content that ranks well might have a higher DA than DR. Conversely, a site with many strong backlinks but thin content might have a high DR but lower DA.

3. Link Dilution Calculation

DR explicitly penalizes links from sites that link out extensively. DA handles this differently through its ranking model. This means a site that earns most of its links from "generous linkers" (directories, resource pages) might score better on DA than DR.

4. Update Timing

Because Ahrefs updates daily and MOZ updates monthly, there can be a significant lag. After a successful link building campaign, your DR might jump immediately while your DA stays flat for weeks.

5. Spam Handling

MOZ has a dedicated Spam Score metric and incorporates spam signals into DA calculations. Ahrefs handles spam differently. A site with some spammy backlinks might see more impact on its DA than its DR.

Which Metric Should You Use?

The honest answer: use both—and add Majestic Trust Flow for a more complete picture. But if you need to choose based on context:

Use DA When:

• Pitching to non-technical stakeholders — DA is more widely recognized and easier to explain
• Evaluating ranking potential — DA's ranking prediction model makes it better for forecasting SERP performance
• Comparing competitor positioning — DA's monthly stability makes it better for snapshot comparisons
• Assessing link prospects — When evaluating whether a site is worth pursuing for a backlink, DA gives a broader quality signal

Use DR When:

• Measuring link building ROI — DR's daily updates show the impact of recent campaigns faster
• Analyzing backlink strength — DR is purely link-focused, making it more precise for backlink-specific analysis
• Tracking progress over time — Daily updates create smoother trend lines
• Technical SEO reporting — DR's clear methodology (backlink graph only) makes it more predictable

Use Both When:

• Building a comprehensive SEO strategy — Neither metric alone captures the full picture
• Vetting link prospects — A site with high DA but low DR (or vice versa) warrants further investigation
• Client reporting — Show both to demonstrate thorough analysis
• Competitor analysis — Discrepancies between DA and DR can reveal interesting patterns about a competitor's strategy

Common Misconceptions

"DA/DR Is a Google Ranking Factor"

Neither DA nor DR is used by Google. Google's John Mueller has stated this directly: "Domain Authority is not something that Google uses or considers." These are third-party estimates. They correlate with rankings because they measure similar signals (backlinks), but they don't cause rankings.

"A Higher Score Is Always Better"

Not necessarily. A site with DA 60 built through spammy PBN links is in a worse position than a site with DA 35 built through genuine editorial links. The quality behind the number matters more than the number itself.

"My Score Dropped—My Rankings Will Drop"

DA and DR fluctuations don't directly affect your rankings. MOZ periodically retrains its DA model, which can cause scores to shift up or down across the board. Ahrefs' daily updates mean DR naturally fluctuates. A 2–3 point change is normal noise.

"I Need DA 50+ to Rank"

Plenty of sites with DA 20–30 rank on page one for competitive keywords. DA is a domain-level metric, but ranking happens at the page level. A single well-optimized page with strong page-level backlinks can outrank higher-DA competitors.

"These Scores Are Comparable Across Metrics"

DA 50 and DR 50 don't mean the same thing. They're different scales with different methodologies. Don't average them or treat them as interchangeable.

How to Improve Both Metrics

Since both DA and DR are fundamentally based on backlinks, the strategies for improving them overlap significantly:

Earn Editorial Links

Create content that journalists, bloggers, and industry experts want to reference. Original research, unique data, and comprehensive guides are the most reliable link magnets.

Prioritize Quality Over Quantity

One link from a DA 70 site is worth more than 100 links from DA 10 sites. Focus your outreach on authoritative, relevant domains.

Diversify Your Link Sources

Links from a variety of domains (different industries, countries, site types) build a more resilient authority profile than links concentrated from a single source type.

Build Links to Inner Pages

Don't just chase homepage links. Building authority to key inner pages (product pages, cornerstone content) creates a stronger overall link profile.

Remove Toxic Links

Disavow links from PBNs, link farms, and unrelated foreign-language sites. A cleaner link profile often leads to better DA/DR than raw link accumulation.

Be Patient

Authority compounds over time. A steady pace of 5–10 quality backlinks per month will outperform a single burst of 200 low-quality links.

Complementary Metrics to Track

DA and DR don't exist in a vacuum. Round out your authority analysis with:

• Majestic Trust Flow — Measures link quality based on trust propagation from seed sites
• Majestic Citation Flow — Measures link quantity, useful as a counterpoint to Trust Flow
• Page Authority / URL Rating — Page-level versions of DA/DR for individual URL analysis
• Referring Domains — Raw count of unique domains linking to you (often more actionable than DA/DR)
• Organic Traffic — The ultimate validation—does your authority translate into actual visitors?

Conclusion

Domain Authority and Domain Rating are both useful, but they answer different questions. DA asks, "How likely is this domain to rank?" DR asks, "How strong is this domain's backlink profile?" Neither is inherently more accurate—they're measuring different things.

The best practice is to track both alongside Majestic's Trust Flow, and focus on the underlying goal: building a genuine, high-quality backlink profile that serves your users and earns trust from search engines.

See both metrics in one place. WebScore combines DA, DR, Trust Flow, and more into a unified dashboard so you can track all your authority metrics without switching between tools.