BMI CLASSIFICATION FOR CHILDREN (AGED 2 to 20)
For children, BMI is calculated in the same way but assessed differently. Because children of different ages grow at different rates, and because this also differs between boys and girls, standardised age and sex specific growth charts are used. A child’s BMI is then interpreted a percentile rather than a category.
CHILDREN’S BMI: INTERPRETATION
Children whose BMI falls between the 5th and 85th percentile are considered healthy. A BMI below the 5th percentile is considered underweight. Those whose BMI is between the 85th and 95th percentile are considered to be overweight, while whose with a BMI above the 95th percentile are considered obese.
As noted above, growth rates are different for boys and girls of different ages. The links below will take you to the appropriate chart. The BMI is not suitable for children under the age of two; however, weight and length of infants can also be assessed in terms of percentile. Links to the growth chart for infant boys and girls are also provided below.
WEIGHT & LENGTH GROWTH CHART
BOYS: 2-20 years
GIRLS: 2-20 years
BOYS: 0-36 months
GIRLS: 0-36 months
* If you have any concern about your child’s weight or growth, talk to your doctor.