RE: What BMI to see abs?
don't go by BMI go by bodyfat%. Your BMI is a ratio of your height to weight. Since there are little abercrombie models that have abs at maybe a 24 BMI there are also pro bodybuilders that have abs at about 40 BMI. Though they're bodyfat is anywhere between 3-7% for all of them. That's the range you'll see abs. Unless you have large abs, then you can see them sometimes at ranges up to 15%. But that high it's not too common.