who participated in national surveys that were conducted from 1963-65 to 1988-94 4. These percentiles express a child’s BMI relative to children in the U.S. What is a BMI percentile and how is it interpreted?Īfter BMI is calculated for children and teens, it is expressed as a percentile which can be obtained from either a graph or a percentile calculator (see links below). The BMI number is calculated using standard formulas. Use the Child and Teen BMI Calculator to calculate BMI.Refer to Measuring Children’s Height and Weight Accurately At Home for guidance. In general, BMI is an inexpensive and easy-to-perform method of screening for weight categories that may lead to health problems.Ĭhild & Teen BMI Calculator How is BMI calculated for children and teens?Ĭalculating BMI using the BMI Percentile Calculator involves the following steps: ![]() BMI can be considered an alternative to direct measures of body fat. BMI does not measure body fat directly, but research has shown that BMI is correlated with more direct measures of body fat, such as skinfold thickness measurements, bioelectrical impedance, densitometry (underwater weighing), dual energy x-ray absorptiometry (DXA) and other methods 1,2,3. ![]() For children and teens, BMI is age- and sex-specific and is often referred to as BMI-for-age. In children, a high amount of body fat can lead to weight-related diseases and other health issues and being underweight can also put one at risk for health issues.Ī high BMI can be an indicator of high body fatness. What are the health consequences of obesity during childhood?īody Mass Index (BMI) is a person’s weight in kilograms divided by the square of height in meters.My two children have the same BMI values, but one is considered obese and the other is not.Can I determine if my child or teen is obese by using an adult BMI calculator?.How can I tell if my child is overweight or obese?.What are the BMI trends for children and teens in the United States?.Why can’t healthy weight ranges be provided for children and teens?.Is BMI interpreted the same way for children and teens as it is for adults?.How is BMI used with children and teens?.What is a BMI percentile and how is it interpreted?.How is BMI calculated for children and teens?.Accurately record the height to the nearest 1/8th inch or 0.1 centimeter.Then, use a metal tape to measure from the base on the floor to the marked measurement on the wall to get the height measurement. Lightly mark where the bottom of the headpiece meets the wall.Make sure the measurer’s eyes are at the same level as the headpiece.Use a flat headpiece to form a right angle with the wall and lower the headpiece until it firmly touches the crown of the head.(See illustration.) Depending on the overall body shape of the child or teen, all points may not touch the wall. Take the measurement while the child or teen stands with head, shoulders, buttocks, and heels touching the flat surface (wall).Make sure the child or teen is looking straight ahead and that the line of sight is parallel with the floor.Make sure legs are straight, arms are at sides, and shoulders are level. ![]() Have the child or teen stand with feet flat, together, and against the wall.Take the height measurement on flooring that is not carpeted and against a flat surface such as a wall with no molding.
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