BMI Calculator
Calculate Body Mass Index using metric or imperial measurements. Reference ranges shown are WHO classifications.
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BMI scale
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Measurements
WHO reference ranges
| BMI | WHO classification |
|---|---|
| Below 18.5 | Underweight (WHO reference range) |
| 18.5 – 24.9 | Normal range (WHO reference range) |
| 25.0 – 29.9 | Overweight (WHO reference range) |
| 30.0 – 34.9 | Obese Class I (WHO reference range) |
| 35.0 – 39.9 | Obese Class II (WHO reference range) |
| 40.0 and above | Obese Class III (WHO reference range) |
About BMI
BMI is a population-level statistical measure developed in the 19th century by Adolphe Quetelet. It does not account for muscle mass, bone density, age, sex, body composition or ethnicity. The WHO reference ranges shown above are published classifications used in population health statistics. They are reference points only.
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