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Calculate your body mass index (BMI) in metric or imperial units.
Enter your weight and height.
Categories follow the WHO adult ranges: under 18.5 underweight, 18.5 to 24.9 normal, 25 to 29.9 overweight and 30 or more obesity. BMI does not distinguish muscle from fat and does not apply to children, so talk to a doctor about what it means for you. This page is not medical advice.