Calculators
BMI Calculator
Calculate body mass index from height and weight in either metric or imperial units, and see where the result sits against the standard adult categories.
Runs entirely in your browser — nothing is uploaded
Your result
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| Category | BMI range |
|---|---|
| Underweight | Below 18.5 |
| Healthy weight | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obesity class I | 30.0 – 34.9 |
| Obesity class II | 35.0 – 39.9 |
| Obesity class III | 40.0 and above |
BMI is a rough screening figure, not a diagnosis. It ignores body composition
and does not apply to children, pregnancy or very muscular builds. Discuss your own
numbers with a healthcare professional.
Good to know
- BMI is a rough population-level screening figure. It does not distinguish muscle from fat and is not a diagnosis.
- The standard adult categories do not apply to children, pregnancy, or highly muscular builds. Talk to a clinician about your own numbers.