How to use it
- Choose metric or imperial units.
- Enter your weight and height.
- Read your BMI, category and healthy weight range.
About this tool
BMI is weight in kilograms divided by height in meters squared. The World Health Organization uses these adult ranges: under 18.5 is underweight, 18.5 to 24.9 is a healthy weight, 25 to 29.9 is overweight, and 30 or above is obesity.
BMI is a quick screening number, not a diagnosis. It does not account for muscle, age, sex or ethnicity, and it is not meant for children or pregnant women. Talk to a doctor about your health.
Questions
Is BMI accurate for athletes?
Not always. Muscle weighs more than fat, so very muscular people can have a high BMI while being healthy.