Keep in mind that BMI is a ratio between height and total body weight - it does not differentiate between weight from muscle and weight from fat, nor does it consider an individual's body frame type. ![]() Children and adolescents are not evaluated using these thresholds but are evaluated relative to others of the same age and gender.For example, in Singapore and Hong Kong a BMI of 23.0 is considered overweight, whereas in the United States a BMI of 25 is considered overweight. In many Southeast Asian countries, the thresholds for the overweight and obese categories tend to be lower.Divide weight by total inches squared and multiply the result by 703.Īlthough BMI is calculated the same way worldwide for all ages, the way an individual's BMI is interpreted depends on location and the person's age. What is his BMI?įind total inches by multiplying 5 * 12 and add 10. Stanley weighs 184 lb and is 5 feet, 10 inches tall. Matilda weighs 64 kg and is 1.9 meters tall. In US units, where weight is in pounds and height is in inches, divide weight by inches squared. Using metric units, where weight is in kilograms and height is in meters, divide weight by meters squared. Cut-off points for specific international subpopulations may vary.ĬDC Female BMI Growth Chart How to Calculate BMI Wikipedia listsĪlternative BMI ranges and categories for specific Asian populations. These ranges typically apply to North American and Eurpoean populations. The CDC and WHO use the BMI range charts below to evaluate the weight of adults aged 20 and over given his or her height. BMI also enables health professionals to discuss bodyweight objectively with their patients. The Centers for Disease Control (CDC) and the World Health Organization (WHO) recognize that people who are overweight or underweight are at higher risk for certain health conditions. Numeric BMI values correspond to weight categories including underweight, normal, overweight and obese.īMI is used as an indicator of the relative healthiness of a person. It is calculated as kg per square meter or pounds per square inch of height. The body mass index or BMI is a ratio of mass to height. See additional BMI formulas below for accurate calculations in metric or imperial units. In US units: BMI = weight (lb) ÷ height 2 (inches) * 703.In metric units: BMI = weight (kg) ÷ height 2 (meters).Currently, most pediatricians accept the definitions from theĬenters for Disease Control, but be aware that you may encounter others in the literature.\( \text \) There are other definitions for overweight and obesity, and these definitions have changed over time. Weight for length graph for boys (birth to 36 months): Weight for length graph for girls (birth to 36 months): ![]() In children under the age of 2 years, overweight is defined as weight-for-recumbent length > 95%. ![]() Instead, you should plot children under the age of 2 on a weight-for-recumbent length graph. ![]() What should we do for children under the age of 2 years? Currently, there are no accepted cutoffs for BMI in this age group. The following image shows how BMI would be used to determine the weight status of four different 10-year-old boys. The Centers for Disease Control (CDC) provides these graphs free of charge: Pediatricians must calculate and graph a child's BMI on a gender-specific chart at every well child visit starting at age 2 years. Underweight: BMI 5 th% and 85 th% and 95 th%.Using the BMI, overweight and obesity are defined as follows: For children over the age of 2 years, definitions for overweight and obesity are based on the Body Mass Index (BMI).Ī BMI calculator can be found at the following website:
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