For years, doctors have used height and weight measurements to assess a child's physical growth in relation to other kids the same age. Now they have another tool: body mass index (BMI).
BMI is a calculation that uses height and weight to estimate how much body fat someone has. Doctors use it to determine how appropriate a child's weight is for a certain height and age.
You can use the BMI calculator below to determine your child's BMI, but it's also important to have your doctor perform regular BMI measurements. That way, you'll know the number is accurate and the doctor can discuss the results with you. (read more)