WHO BMI Calculator
Official Health Guidelines
WHO Health Report
BMI Score
0
Weight Category
Healthy Range
18.5 - 24.9
WHO BMI Classification
| BMI Range | Category | Health Risk |
|---|---|---|
| < 16.0 | Severe Thinness | High risk of nutritional deficiencies |
| 16.0 - 16.9 | Moderate Thinness | Increased health complications |
| 17.0 - 18.4 | Mild Thinness | Moderate health risk |
| 18.5 - 24.9 | Normal Range | Lowest health risk |
| 25.0 - 29.9 | Overweight | Increased risk |
| 30.0 - 34.9 | Obese Class I | High risk |
| 35.0 - 39.9 | Obese Class II | Very high risk |
| ≥ 40.0 | Obese Class III | Extremely high risk |
WHO Health Recommendations
Underweight (BMI < 18.5)
- Gradual weight gain through balanced nutrition
- Increase protein intake (1.2-1.5g/kg body weight)
- Resistance training to build muscle mass
- Regular medical check-ups
Normal Weight (18.5-24.9)
- Maintain current weight through balanced diet
- 150-300 minutes moderate exercise weekly
- Limit saturated fats to <10% of total energy intake
- Regular health screenings
Overweight (25.0-29.9)
- 5-10% weight loss for health improvements
- Reduce energy intake by 500-750 kcal/day
- Increase physical activity to 300 minutes/week
- Limit sugar intake to <25g/day
Obesity (≥30.0)
- Medical supervision for weight management
- Combination of diet, exercise, and behavioral therapy
- Consider pharmacological treatment if BMI ≥30 or ≥27 with comorbidities
- Bariatric surgery for BMI ≥40 or ≥35 with comorbidities