Categories – BMI Calculator
The World Health Organization defines these ranges for adults aged 20 and over:
| Category | BMI |
|---|---|
| Underweight | < 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25 – 29.9 |
| Obese | ≥ 30 |
Some countries use slightly different cut-offs: several Asian health authorities, for example, define overweight from a BMI of 23, because health risks appear at lower values in those populations.
Interpretations differ by country: with the Interpretation selector above you can switch between the WHO international, Asia-Pacific and Chinese cut-offs. The gauge, categories and healthy range update accordingly.