The body mass index (BMI), or Quetelet index, is used to estimate a healthy body weight based on a person's height.
| BMI Category | WHO Standard | Asia Standard | China Standard |
|---|---|---|---|
| Underweight | <18.5 | <18.5 | <18.5 |
| Normal | 18.5~24.9 | 18.5~22.9 | 18.5~23.9 |
| Overweight | 25.0~29.9 | 23.0~24.9 | 24.0~27.9 |
| Obese | >=30.0 | >=25.0 | >=28.0 |