One of the biggest questions guys and girls have as they grow
and develop is whether they're the right weight. One place to
start is by learning about body mass index, or BMI, a
calculation that estimates how much body fat a person has based
on his or her weight and height. BMI can help doctors identify
people who are overweight and at risk of developing medical
problems like high cholesterol, high blood pressure, and
diabetes. Doctors can monitor that person's weight and make
recommendations about healthy eating and exercise. Our BMI
calculator can help you find out what your BMI is. When you get
your results, it's a good idea to ask a doctor or health
professional to help you figure out what they mean. That's
because BMI is not perfect. For example, it's very common for
teens to gain weight quickly — and see their BMI go up — during
puberty. Those changes may be a normal part of development (for
example, someone with a large frame or lots of muscle can have a
high BMI.) Or, the changes can be a sign of futu