Currently the average MCAT of students who actually matriculate at medical school is 31. 31 is roughly 83rd percentile. Nevertheless, keep in mind that this is an average. Applicants with scores greater than 31 get rejected and applicants with scores less than 31 get accepted. Generally a 33 is a safe score while anything above 35 would be considered a great score. Keep in mind that the lower your GPA is, the higher you need your MCAT score to be.