BMI Calculator

Calculate your body mass index using metric or imperial units. Get an instant BMI number, adult reference category and healthy weight range.

Metric + imperialInstant resultPrivate calculation

Enter your measurements

Unit system

Weight (kg)

Height (cm)

Weight (lb)

Height (ft)

Extra inches

Under 18.5 is underweight, 18.5-24.9 is typical healthy range, 25-29.9 is overweight, and 30+ is obesity range.

BMI can be less accurate for athletes, children, pregnant people and older adults. Use it as a simple reference.