Interactive Tool: What Is Your Child's BMI? - What does this tool measure?
This tool uses your child's weight and height to compare your
child's size to that of other boys or girls of the same age. Not all children
are the same. Some are naturally larger and some are naturally smaller. Your
child's size will be given two numbers-a BMI value and its percentile. The
percentile is the number that ranks your child's size among other children of
the same gender and age.
What's most important is that your child
is at the same percentile over time, so it takes several measurements to assess
your child's growth. You should talk with your doctor if your child
suddenly shifts up or down in percentile. A gradual
change from one percentile to another is probably not a cause for
Talk with your doctor if you are concerned about your
child's weight. Finding that a child is "overweight" or "underweight" is a
medical diagnosis. Your doctor can give you steps to take to help your child
reach and stay at a healthy weight.