Adults age 20+ · Screening tool
Adult BMI Calculator
Enter height and weight using metric or US units to calculate body mass index and view the corresponding adult screening category.
Your measurements
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Your result
Body mass index—
Adult category—
BMI 18.5–24.9 weight range—
How to interpret BMI
For adults age 20 and older, the CDC categories are: underweight below 18.5, healthy weight from 18.5 to below 25, overweight from 25 to below 30, and obesity at 30 or higher. Obesity is divided into classes 1, 2 and 3.
BMI is a screening measure, not a diagnosis. It does not directly measure body fat and should be considered with other health factors. Children and teens require age- and sex-specific percentiles. If you have health questions, speak with a qualified healthcare professional.