I am skeptical of admission calculators as well simply because they don’t agree. If they were operating from all accurate applicant data, they should all have the same figures. But they don’t. So I keep a probability spreadsheet that includes the calculations of five different probability calculators. In my case it gets a little complicated…but I’m more comfortable looking at everything than just one site based off 2003 data.
If anyone is curious the average is linked to here http://www.lawschooldiscussion.org/prelaw/index.php/topic,44428.0.html
Ummm... Averaging a bunch of inaccurate data should not provide more accurate information. As the saying goes, "garbage in, garbage out". However, I do understand what you are trying to do. And perhaps, it helps. But keep in mine that if one of the 5 is really bad, your average could be worse than the single best predictor.
Regarding accuracy, none of the calculators are accurate. This is because they do not include many of the other factors that determine whether you are accepted. So until the calculators start using your LSAT, GPA, application date, URM status, UG school, UH major, family background, PS quality, Diversity statement quality, Work Experience, graduate work, significant achievements (leadership, etc), etc. etc.