dude, there is not website who can do that. its impossible.
it depends....it varies, you could have a GPA of 2.5 and get in with really really high DAT scores. same other way around. you could have a high DAT and high GPA; but lack any social skills. it depends on EC's, LORs, your essay, your application in general...and most of all, it depends on the school you are applying to....it depends whether you have a bachelors or not, it depends if your a resident or not if applicable....etc etc etc...i hope realise what i am trying to tell you here. read on SDN acceptances and rejections...you'll get a feel for it.....its not one of those things were your either in or out depending on your numbers.
good luck!
phospho