BMI Calculator
Your BMI Result
BMI
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—
Underweight
< 18.5
Normal
18.5 – 24.9
Overweight
25 – 29.9
Obese
≥ 30
What is BMI?
Body Mass Index (BMI) is a measure of body fat based on height and weight. It applies to adult men and women. BMI = weight (kg) / height (m)². While BMI doesn't measure body fat directly, it correlates with more direct measures of body fat.
BMI Categories
Underweight: BMI less than 18.5. Normal weight: BMI 18.5–24.9. Overweight: BMI 25–29.9. Obese: BMI 30 or greater. These categories apply to adults aged 20 and older.
Limitations of BMI
BMI may overestimate body fat in athletes and others who have a muscular build. It may also underestimate body fat in older persons and others who have lost muscle. BMI is a screening tool, not a diagnostic tool.