Adult BMI Calculator

How this BMI calculator works

BMI is weight in kilograms divided by height in metres squared. For adults, the calculator displays standard screening categories: below 18.5, 18.5–24.9, 25–29.9, and 30 or above.

Understand the result

BMI is a screening measure, not a diagnosis. It does not directly measure body fat and may be less informative for athletes, pregnant people, older adults, or some individuals. Children and teenagers require age- and sex-specific assessment.

If a result concerns you, discuss it with a qualified healthcare professional rather than changing treatment or diet solely from this calculator.