DA, DR and PageRank Converter
Translate a Moz DA, an Ahrefs DR or an Open PageRank score into the other two, as a range rather than an invented number. Or enter a domain and get its real, measured Open PageRank score.
A well-established profile competing in most niches. The spread between the three is at its widest here, because mid-sized sites are where index coverage differs most.
Short answer
There is no exact conversion between Moz DA, Ahrefs DR and Open PageRank. They are three scores over three different crawls of the web, and they disagree about which links exist before they disagree about what one is worth. What holds is roughly where a site sits relative to everything else, so this returns a range and a band: Open PageRank 4 to 5.5 is around DA 35 to 60. Only the lookup figure is measured.
Three metrics, three indexes, one question
All three try to answer the same thing, which is how strong a site's backlink profile is compared with the rest of the web. They differ in who crawled the web to find out.
| Metric | Who computes it | Scale | Built on | Free? |
|---|---|---|---|---|
| Domain Authority (DA) | Moz | 0 to 100 | Moz's own link index | Limited, through Moz's tools |
| Domain Rating (DR) | Ahrefs | 0 to 100 | Ahrefs' own link index | No, since the free endpoint closed in 2026 |
| Open PageRank | Open PageRank, from Common Crawl | 0 to 10 | Common Crawl's public index | Yes, and it is what this site uses |
| PageRank (Google's) | 0 to 10, historically | Google's index | No. The toolbar score was frozen in 2013 and removed in 2016 |
Why a free DA checker is usually not one
Moz DA comes from a paid API. A free tool offering unlimited DA lookups is normally showing a different metric under Moz's label, or caching stale figures. That is the reason this page shows Open PageRank and names it, rather than estimating someone else's proprietary number and calling it DA.
The bands the conversion uses
This is the whole method, stated so you can disagree with it. Each row is a band of comparable link strength, and the ranges are deliberately wide, because a site at Open PageRank 4.2 genuinely can be DA 28 or DA 45 depending on whose crawler found its backlinks.
| Open PageRank | Approx. DA | Approx. DR | What sits here |
|---|---|---|---|
| 0 to 1 | 0 to 10 | 0 to 10 | New or thin. Below this the three metrics are mostly noise |
| 1 to 2.5 | 10 to 25 | 8 to 25 | An early profile with a handful of real referring domains |
| 2.5 to 4 | 20 to 40 | 18 to 40 | Most small business and niche content sites |
| 4 to 5.5 | 35 to 60 | 35 to 60 | Well established. The spread between metrics is widest here |
| 5.5 to 7 | 55 to 80 | 55 to 80 | Authoritative, competing for the most valuable keywords |
| 7 to 10 | 75 to 100 | 75 to 100 | Major platforms, news outlets, household names |
The ranges overlap on purpose. A conversion that returned one number would be stating a precision none of these metrics has, and the overlap is where the real disagreement between the three indexes lives.
What these numbers are worth, and what they are not
Authority scores are a fast first filter on a long list and a poor basis for any decision on their own. The difference matters because they are priced as though they were the second thing.
- 01
Decide which number you actually need
If someone has quoted you a DA, you need to know what it means rather than what it converts to. A guest post priced on DA 50 is priced on one company's estimate of one crawl of the web, and the conversion will not change what you are being sold.
- 02
Look the domain up rather than converting a quoted figure
Open PageRank is free, public and measured. If you can run the domain, do that instead of converting a number someone else gave you, because you then have a figure you can check rather than one you have to trust.
- 03
Read the band, not the number
The useful output is which sixth of the web a site sits in, not whether it is 42 or 47. The three metrics will never agree on the second decimal and were never built to.
- 04
Compare like with like, in one metric
A list of prospects is only comparable if every row came from the same tool on the same day. Mixing a DA from one spreadsheet with a DR from another produces an ordering that means nothing, which is the usual state of a link prospecting sheet.
- 05
Check the referring domains behind the score
A score is a compression of a link profile into one number. Two sites at the same score can have 40 relevant referring domains or 4,000 junk ones. The count, and who the referrers are, is the part that predicts anything.
- 06
Stop short of treating any of them as a ranking factor
None of these is a Google metric and none appears in its ranking systems. They are third-party estimates of link strength, useful for comparing sites quickly and useless as a target to optimise towards.
What to look at instead, when the decision matters
- Organic traffic and the queries a site ranks for. An outcome, not an estimate of an input, and far harder to fake than a link count.
- The referring domains behind the score. Forty relevant ones beat four thousand from expired domains, and the score cannot tell you which you are looking at.
- Whether the specific page your link would sit on gets visitors. Site-wide authority says nothing about a page nobody reads.
- Whether the site sells links. A high score quoted in a sales pitch is the case where the number is least trustworthy, because it is the number being sold.
To run a list rather than one domain, the bulk authority checker takes up to 50 at once, and the domain age checker adds the signal that catches expired-domain networks, which authority scores miss entirely.
What this converter does
Converts in any direction
DA, DR or Open PageRank in, the other two out
Ranges, not invented numbers
Because the three metrics do not agree to a decimal and never did
A real lookup too
Enter a domain for its measured Open PageRank, free and checkable
The method is on the page
The band table is the whole algorithm, printed so you can disagree with it
Named honestly
The measured figure and the estimated ones are marked apart, every time
No signup
No account, no email, no credit for a metric that is public anyway
Why the output is a range
Frequently asked questions
Can you convert Domain Authority to Domain Rating?
Only approximately, and anyone offering an exact formula is inventing one. The two are computed over different crawls by different companies using different models, so they disagree about which links exist before they disagree about what one is worth. What can be said is where a site sits relative to the rest of the web, because all three scales spread sites similarly. That is why this returns a range and a band.
What is a DA PA checker?
A tool that reports Moz's Domain Authority and Page Authority for a domain or URL, both on a 0 to 100 scale. DA estimates the strength of a whole site's link profile and PA the strength of one page's. Both are Moz's proprietary metrics, available through Moz's own tools and paid API, which is why most free DA PA checkers either rate-limit heavily or show a different metric under the same name.
Why does this tool show Open PageRank rather than DA?
Because Open PageRank is free, public and checkable, and Moz DA is not. Open PageRank is computed over Common Crawl's index and published openly on the familiar 0 to 10 scale. Showing a measured figure and being clear about what it is beats showing an estimate of someone else's proprietary number and calling it DA.
What is the difference between DA, DR and PageRank?
Different companies' answers to the same question. Moz DA (0 to 100) predicts ranking strength from Moz's link index. Ahrefs DR (0 to 100) scores the strength of a site's backlink profile from Ahrefs' index, and is more purely a link metric. Open PageRank (0 to 10) applies the original PageRank algorithm to Common Crawl. Google's own PageRank still exists inside its ranking systems, but the public toolbar score was frozen in 2013 and removed in 2016.
Is a DA of 50 good?
It depends entirely on what you are comparing it with, which is the problem with the question. DA 50 is strong for a niche blog and weak for a national news site. The number is only useful against a reference point: the sites currently ranking for the query you want. Checking three of those and comparing is worth more than any absolute threshold.
Why do the three scores disagree so much for my site?
Index coverage, mostly. Each tool can only score the links it has crawled, and the three crawl different subsets of the web at different depths and refresh rates. A site with backlinks concentrated in places one crawler covers well and another covers poorly will score very differently in the two. The disagreement is widest for mid-sized sites, which is where crawl coverage varies most.
Do these scores affect Google rankings?
No. None of them is a Google metric and none appears in its ranking systems. Google has said directly that it does not use Domain Authority. What these scores correlate with is the underlying thing Google does care about, which is the quality and quantity of links a site has earned, so they are useful as a comparison and worthless as a target.
Why is the scale logarithmic, and why does that matter here?
Because link value on the web follows a power law: a handful of sites hold most of it. A linear scale would put almost every real site between 0 and 3 and leave the rest empty. The practical consequence for converting is that the gap from 80 to 90 represents vastly more link value than the gap from 30 to 40, so a fixed offset between two metrics cannot hold across the range.
Can I use these numbers to price a guest post?
People do, and it is the main reason these metrics are gamed. A score built on counted links can be inflated with bought ones, so a site quoting a high DA to sell placements is exactly the case where the number is least trustworthy. Look at the referring domains behind the score and whether the site has organic traffic, which is far harder to fake than a link count.
How often do these scores change?
Open PageRank refreshes roughly monthly, as Common Crawl publishes new data. Moz and Ahrefs update on their own schedules, more frequently. A score that moved without your link profile changing is usually an index refresh rather than anything you did, which is why month-to-month movement of a point or two is not worth investigating.
Can I check several domains at once?
Yes, with the bulk authority checker, which runs up to 50 domains in a single pass and returns Open PageRank, global rank and referring domains for each. That is the right tool for a prospecting list. This page is for understanding one number, or translating one someone else quoted at you.
What should I use instead of a DA score?
For judging a site, its organic traffic and the queries it ranks for, because those are outcomes rather than estimates of an input. For judging a link, whether the page it sits on is relevant and gets visitors. Authority scores are a fast first filter on a long list, and a poor basis for any decision that matters on its own.
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Read guideTerms this tool checks
- Domain Authority
Domain Authority (DA) is a metric developed by Moz that predicts how likely a website is to rank in search results, scored on a scale of 1-100.
- Backlink
A backlink (also called an inbound link or incoming link) is a hyperlink from one website to another.
- Link Equity
Link equity (also called link juice or PageRank) is the ranking value passed from one page to another through hyperlinks.
A number for a site, and nothing about your own
Authority scores compare sites from the outside. CrawlRaven works from the inside: your Search Console and GA4 data joined to a crawl of your pages, so you see the queries you rank for, the impressions you earn and the pages losing them, rather than one compressed estimate of your link profile.