National Center for Chronic Disease Prevention and Health Promotion
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|Use the charts listed below when
measuring boys and girls in the recumbent position (should be
limited to those less than 36 months old):
||Use the charts listed below when
determining the stature (standing height) of boys and girls aged 2
to 20 years:
First, record information about factors obtained at the initial visit that influence growth.
- Enter mother's and father's stature as reported.
- Enter the gestational age in weeks.
The next line is reserved for recording the child's birth data. (Omit this step when using growth charts for children aged 2 to 20 years.)
- Enter the date of birth.
- Enter birth weight, length, and head circumference.
- Add notable comments (e.g., breastfeeding).
Record information obtained during the current visit.
- Enter today's date.
Determine age to the nearest month for infants and 1/4-year for children 2 to 20 years.
- Enter the child's age.
Example of how to calculate the child's age: To calculate Sam's
age, subtract his birth date from the date of the visit or measurement. To
subtract, it will be necessary to convert months to days and years to
months if either the month or day in the birth data is larger than in the
date of measurements. When converting one month to days, subtract 1 from
the number of months in the date of measurement, then add 28, 30, or 31,
as appropriate, to the number of days. When converting one year to months,
subtract 1 from the number of years in the date of measurement, then add
12 to the number of months.
Sam is aged 3 years, 6 months, and 19 days.
Using the guide above, 3 years, 6 months, and 19 days is rounded to 3 years and 7 months. Because age for children over 2 is rounded to the nearest 1/4 year, Sam's age is rounded to 3 1/2 years. Sam is aged 3 years, 6 months, and 19 days.
With a calculator, determine BMI using the calculation below.
BMI = Weight (kg) ÷ Stature (cm) ÷ Stature (cm) x 10,000
BMI = Weight (lb) ÷ Stature (in) ÷ Stature (in) x 703
It is necessary to convert the weight and stature measurements to the appropriate decimal value shown in Table 1.
Example: 37 lbs. 4 oz. = 37.25 lbs., 41-1/2 inches = 41.5 in.
Table 1. Decimal Conversions
This page last updated July 18, 2013
States Department of Health and Human Services