CDC table for calculated body mass index values for selected heights and weights for ages 2 to 20 years
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CDC table for calculated body mass index values for selected heights and weights for ages 2 to 20 years

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      Body Mass Index (BMI) is determined as follows: English Formula:

      Weight in pounds ÷ Height in inches ÷ Height in inches x 703 = BMI Metric Formula:

      Weight in kilograms ÷ Height in meters ÷ Height in meters = BMI

      The above BMI formulas have already been calculated and are presented in this table entitled Calculated Body Mass Index Values for Selected Heights and Weights for Ages 2 to 20 Years. To use the BMI table, first locate the child’s height and weight in the height and weight ranges listed in the upper right corner of each page. The table of contents contains a list of height and weight ranges and may be used to locate the page numbers for specific BMI values. Please note that some height and weight measurements are found on more than one page, so be sure that both the height and weight measurements are within the range listed at the top of the page. Weight measurements are listed in increasing sequential order. Once the exact page has been located in the table, the point where height and weight intersect represents the BMI value. This value is then plotted on the BMI-for-age growth chart to determine whether the child is within a normal growth pattern, overweight, obese, or underweight.

      In the table, English height measurements (inches) are shown in 1/2-inch increments for heights below 48 inches and 1-inch increments for heights between 48 and 78 inches. English weight measurements (pounds) are shown in 1/2-pound increments for weights under 60 pounds, 1-pound increments for weights between 60 and 110 pounds, and 2-pound increments for weights between 112 and 250 pounds. The corresponding metric values in centimeters and kilograms are included next to the English values in the table. Whenever a child’s specific height or weight measurement is not listed, round to the closest number in the table.

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