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Ah, I get it now. I'm not a math whiz, but the exponential factor is certainly going to throw you for a loop in this calculation. Domain Authority uses an exponential base between 6 and 7. (meaning a DA of 50 is 6-7 times more powerful than a DA of 40) I'm sure there's some way to take that into your calculation, but I went to public school so it's beyond my simple math skills. But you might be on to something. My estimation is that a site with a DA of 40 is about 30x more powerful than a site with a DA of 23, all other things being equal. This conversation reminds me of searching out your true competition, and search visibility. If you continue down this path, you may be interested in these topics. https://seogadget.co.uk/search-engine-visibility/ http://www.seomoz.org/blog/defining-your-true-competitors

Will do, thanks Casey. In the meantime, I might just have to talk to an iOS developer friend of mine to have them whip something up. I'm picturing something like the 3rd party Basecamp apps, which should be relatively simple to build, and would help make checking rankings, crawl reports and Q&A's easier on the go.