If the child's BMI is greater than the 5th percentile but below the 85th percentile, the child has a normal or healthy weight.Generally, the child is considered underweight if their BMI falls below the 5th percentile.The CDC chart allows you to find the percentile for children, teenagers, and young adults from two years old to 20 years old.of Health and Human Services Go to source X Trustworthy Source Centers for Disease Control and Prevention Main public health institute for the US, run by the Dept. Use a piece of paper or other straight edge to find the point on the chart that corresponds with the child's BMI and age. To use the BMI growth chart, first find the child's age along the bottom of the chart, then find the child's BMI along the side. You have to consult a chart to determine what that number means based on the child's age and biological sex. The calculator will provide you with the child's BMI however, unlike an adult BMI calculation, the child's specific BMI doesn't tell you much.Don't use a calculator if the website is asking for your name, email address, or any other such information before giving you the results. Ideally, you want to use a calculator on the website of a government agency or health care provider you trust.Many state government and health insurance agencies also have reliable calculators. You can find a reliable children's BMI calculator on the Centers for Disease Control and Prevention (CDC) website here.All you have to do is provide the child's age, biological sex, and measurements. While you can calculate the child's BMI manually, it typically is much easier to find a BMI calculator online. Using a metal tape measure, find the child's height by measuring the distance from the floor to the mark you made.Įnter the child's information into a BMI calculator.You may want to have the child duck out from under it once you have the stick in place so you can make your mark. Make a light mark with a pencil at the spot where the bottom of your stick hits the wall.Lower it until it firmly rests on the top of the child's head. Get a flat stick such as a ruler and place it against the wall at a right angle.Keep in mind that depending on the child's body shape, they may not be able to touch the wall with all of those body parts. The child's heels should be together, their shoulders flat. Have the child stand straight with their head, shoulders, buttocks, and heels against the wall, looking straight ahead.Choose a location where the child can stand straight against the wall on an uncarpeted floor. You can get an accurate measure of the child's height at home with a flat stick, a wall, and a measuring tape.

Teenager bmi calculator