Uses your child's weight and height to compare your child's size to that of other boys or girls of the same age. Covers what the results mean and next steps.
Interactive Tool: What Is Your Child's BMI?
What does this tool help you learn?
This tool calculates your child's body mass index (BMI), which provides a way to estimate the effect of weight on health. This tool also gives you your child's percentile on a growth chart. The
percentile is the number that ranks your child's BMI among the BMIs of children of
the same gender and age. Taking several BMI measurements over time can help you and your doctor assess
your child's growth.
can be used for children ages 2 through 19. Be cautious if you use this tool or
any height and weight charts to assess your child's growth after he or she
reaches puberty. Check with your doctor if you have questions.
Centers for Disease Control and Prevention (2011). Healthy weight—It's not a diet, it's a lifestyle! About BMI for children and teens. Available online: http://www.cdc.gov/healthyweight/assessing/bmi/childrens_bmi/about_childrens_bmi.html.
What do the results mean?
If your child is on the
very low end of the percentile scale (for example, the 5th percentile), you may
be concerned that your child is too small. This may be
normal for your child. But if you are concerned, talk to your
doctor. Your doctor can check your child to make
sure that he or she is growing as expected.
Often parents of very
small children push their children to eat more because they are concerned about
their growth. This can cause problems. The child may eat less. Talk about your child's weight
with your doctor. As long as your child is growing normally, you can relax a
little about feeding him or her.
If your child is on the upper end
of the percentile scale (for example, the 95th percentile), you may be
concerned that your child is too big. This may be
normal for your child. But if you are concerned, talk to your doctor. Your doctor can check your child to make sure
that he or she is growing in a healthy way.
Parents of larger children are
sometimes tempted to feed their child less food, to keep them from
gaining too much weight. This doesn't work. When food has been restricted, the child may overeat when he or she gets the chance. Again, it is good to
discuss your child's weight with a doctor who can help you see if your child's
growth is within his or her normal pattern.
Your child's growth
over time is the most important thing to think about when you are
concerned about what your child's weight should be at any age. Your child's
doctor will decide what your child's weight should be, based on what your
child's growth pattern has been over time.
If you print a boy or girl growth chart, use the steps that follow. Then keep the chart so that you can track your child's percentile for several years.
Use this tool to find your child's BMI about once a year or as often as your doctor suggests.
Find your child's BMI on the side of the chart.
Find your child's age on the bottom of the chart.
Find the point where BMI and age meet. Your child's percentile will be in one of the shaded areas. Follow the curved line to the right to estimate the percentile.
On your child's growth chart, mark your child's percentile.
Talk with your doctor about what your child's BMI means. Remember that BMI-for-age is just a guide. Your doctor can give you steps to take to help your child reach and stay at a healthy weight. These may include providing healthy foods and helping your
child be active for certain amounts of time.
Centers for Disease Control and Prevention (2011). Healthy weight—It’s not a diet, it’s a lifestyle! About BMI for children and teens. Available online: http://www.cdc.gov/healthyweight/assessing/bmi/childrens_bmi/about_childrens_bmi.html.
How this information was developed to help you make better health decisions.