If you are 12 years old and weighs 144 pounds does that consider the person fat?

no it doesnt mean you would be fat. there are more factors to go by, the height and gender are important factors.... and the BMI (body mass index) such as bone width and thickness... weight doesnt say "you are this fat" it is the measurement of your gravitational pull to the earth, therfore, its measuring multiple things in you... muscles (which weigh more than fat), organs, bone, skin... everything. one guy can be 200 lbs. and be very muscular and have a bmi of 5%. so no, i dont consider that fat.that just means no