Free tool

BMI calculator

One calculator, with standard or South Asian cutoffs. See your BMI, a healthy weight range for your height, and an optional waist check.

For adults 18 and over. BMI isn't designed for children, pregnancy, or very muscular athletes.

Are you of South Asian descent?

Choose Yes to use South Asian cutoffs. Your BMI number stays the same; the category, healthy weight range, and waist limits change.

Units

Measure at the belly button.

Sex

Your BMI and scale will show here. Change any answer and the old result clears.

Sources: World Health Organization adult BMI categories (WHO); National Institutes of Health waist circumference cutoffs (NIH); Misra et al., 2009 (Asian Indian overweight and obesity cutoffs) (PubMed); International Diabetes Federation (South Asian waist cutoffs) (IDF consensus).

The South Asian display uses 18 as the lower normal BMI boundary; WHO uses 18.5. BMI categories are screening guides, not a diagnosis. Your answers and results stay in your browser.

See the US edition of the BMI calculator.