BMI Calculator
Body Mass Index for adults aged 20 and over. Choose the units you prefer for weight and height, enter your numbers, and see your BMI.
below 18.5Healthy
18.5-24.9Overweight
25-29.9Obesity
30+
What your result means
BMI is a screening measure, not a diagnosis. It does not measure body fat directly and should be considered with other factors, such as waist circumference, diet and activity. If you have questions about your BMI, talk with your doctor or health care provider.
This calculator is for adults aged 20 and over. For children and teenagers, BMI is judged by age and sex (BMI-for-age), so this result does not apply to them.
Not medical advice. Categories follow the World Health Organization (WHO, fact sheet of 7 October 2026: overweight is a BMI of 25 or more, obesity 30 or more, for adults) and the US Centers for Disease Control and Prevention (CDC, Adult BMI Categories: underweight below 18.5, healthy weight 18.5 to under 25, overweight 25 to under 30, obesity 30 or greater).
About this app
BMI Calculator is a free app from Dr Rex Al Opusunju - Author, Bible Teacher, Musician and App Developer.