BMI Calculator Online
Calculate your Body Mass Index using your height and weight. Choose metric or imperial units and view your BMI result instantly.
Enter your height and weight to calculate BMI.
Your Body Mass Index
Adult BMI Categories
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Healthy weight |
| 25.0 – 29.9 | Overweight |
| 30.0 or above | Obesity |
How to Calculate BMI
Select metric or imperial measurements, enter your weight and height, and click Calculate BMI. The calculator displays your BMI value and the corresponding standard adult category.
BMI is calculated by dividing weight in kilograms by height in meters squared. It is a general screening measure, not a diagnosis or a direct measurement of body fat. These categories are intended for adults aged 20 and older; children and teenagers require age- and sex-specific BMI interpretation. BMI may also be less informative during pregnancy or for people with unusually high muscle mass.