BMI Calculator
Body Mass Index
Result
BMI Classification (WHO)
| Classification | BMI (kg/m²) |
|---|---|
| Underweight | < 18.5 |
| Normal 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 |
Note: BMI is a useful tool for population-level assessment, but has limitations. It does not account for body composition (muscle vs. fat), fat distribution, age, sex or ethnicity. The WHO notes that populations of Asian descent may present cardiometabolic risk at lower BMI values, and has proposed additional public-health action points (overweight ≥ 23 and obesity ≥ 27.5 kg/m²). For a complete assessment, consult a healthcare professional.
References
- 1. World Health Organization. "Obesity: Preventing and Managing the Global Epidemic. Report of a WHO Consultation." World Health Organ Tech Rep Ser. 2000;894:i–xii, 1–253. PubMed ↗
- 2. Nuttall FQ. "Body Mass Index: Obesity, BMI, and Health: A Critical Review." Nutr Today. 2015;50(3):117–128. PubMed ↗