How tall will a 12 yr old boy be if he's 5'11.his mom 5'7.his dads 6'1..he's always been tall.he was 5'7 last year and he grows 4 inches every year.?

Hard to say....: I know you think this is a simple question but it isn't! according to the growth curve, he's about the 95%ile for age, which predicts an adult height of about 6'4". According to the law of averages, he should be about 6'1/2". It really depends on lots of things: -pubertal stage -nutrition -health -hormonal disorders a better way to answer would be to see his pediatrician and find out more.