Calculate your Body Mass Index (BMI) to find out your weight category — underweight, normal, overweight, or obese.
| BMI Range | Category | Risk of comorbidities (WHO) |
| Below 18.5 | ⬇ Underweight | Low (but risk of other clinical problems increased) |
| 18.5 – 24.9 | ✅ Normal weight | Average |
| 25.0 – 29.9 | ⚠ Overweight | Increased |
| 30.0 – 34.9 | 🔴 Obese Class I | Moderate |
| 35.0 – 39.9 | 🔴 Obese Class II | Severe |
| 40.0 and above | ⛔ Obese Class III | Very severe |
Body Mass Index (BMI) is a screening measure calculated from height and weight; it does not directly measure body fat. It applies to adult men and women and is widely used by doctors as a quick screening tool. BMI = weight(kg) ÷ height²(m). The categories and the risk-of-comorbidities column follow Table 2.1 of WHO Technical Report 894 (2000), where the 25.0 to 29.9 band is called pre-obese. They describe populations, not a diagnosis for one person.
BMI does not directly measure body fat. Athletes with high muscle mass may have a high BMI despite being healthy. It also does not account for age, ethnicity, or fat distribution. Always consult a doctor for a complete health assessment.
A WHO expert consultation (The Lancet, 2004) concluded that many Asian people have a high risk of type 2 diabetes and cardiovascular disease at BMI values below the standard overweight cut-off of 25. It did not set one new cut-off for all Asians. It kept the WHO categories and listed further public health action points, including 23.0 and 27.5. The categories above are the standard WHO ones.
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