Many websites offer calculators to help adults determine their BMI. However, you should not use these calculators to determine your child’s BMI. Children’s BMI numbers are broken into categories called “percentiles.” Percentiles allow your doctor to compare your child with other children who are the same age, height, and sex. If your child’s BMI is higher than 85% of other children who are the same age, height, and sex, he or she is considered overweight. If your child’s BMI is higher than 95% of other children who are the same age, height, and sex, he or she is considered obese.
The Political Declaration of the High Level Meeting of the United Nations General Assembly on the Prevention and Control of Noncommunicable Diseases of September 2011 recognizes the critical importance of reducing the level of exposure of individuals and populations to unhealthy diet and physical inactivity. The Political Declaration commits to advance the implementation of the WHO Global Strategy on Diet, Physical Activity and Health, including, where appropriate, the introduction of policies and actions aimed at promoting healthy diets and increasing physical activity.