Body Mass Index (BMI) is a tool for indicating weight status in adults and for assessing underweight, overweight, and risk for overweight in children and teens.
For adults over 20 years old, BMI is a measure of body weight adjusted for height.
BMI for children and teens (2 to 20 years old) is calculated differently than adult BMI. Also called "BMI-for-age," measurements are gender and age specific, due to a child's rate of growth and development.
BMI calculators
From The Pennsylvania Medical Society
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BMI CalculatorThe BMI is a widely respected standard to tell if you are overweight.
From The Children's Nutrition Research Center (CNRC)
From the
Centers for Disease Control and Prevention (CDC)