Body Mass Index with China / WHO thresholds, healthy weight range and optional U.S. Navy body-fat estimate.
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Optional: estimate body fat % (U.S. Navy formula)
Enter height (cm) and weight (kg), pick a standard, and click Calculate. BMI = weight / height². China thresholds: underweight <18.5 / normal 18.5–24 / overweight 24–28 / obese ≥28. WHO: 18.5 / 25 / 30. The healthy-weight range shows the body weight that keeps BMI within 18.5–24. Optionally expand the body-fat section and enter sex, age, neck and waist (and hip for women) to estimate body fat % using the U.S. Navy formula.