What BMI and above would you class as fat (assuming no/little muscle mass)? I am 19 and I was a 32 BMI (obese) , and after counting calories and exercise and down to a 24 BMI (19 to 25 is healthy), hoping to hit 20/21. I think fat people are lazy and dumb, food is for survival, not for pleasure (unless on a special occasion). What BMI and above do you class as fat.