About this tool
Body Mass Index (BMI) is a quick screening number that compares your weight to your height. It is calculated as weight in kilograms divided by height in meters squared. BMI does not measure body fat directly, so athletes and older adults may get misleading results — treat it as a starting point, not a diagnosis.
How to use
- Enter your height in centimeters.
- Enter your weight in kilograms.
- Your BMI and weight category update instantly.