Body Mass Index & Health Assessment
✓ WHO Standard Categories - 8 detailed classifications
✓ BMI Prime Calculator - Optimal health indicator
✓ India-Specific - Adjusted for Asian genetics
✓ Healthy Weight Range - Personalized targets
Your BMI
24.2
Normal
WHO Category
Normal
Low Risk
BMI Prime
0.97
Below ideal
Adjusted for Asian population genetics
| Category | BMI Range | BMI Prime | Risk Level |
|---|---|---|---|
| Severe Thinness | 0 - 16 | 0.00 - 0.64 | Very High Risk |
| Moderate Thinness | 16 - 17 | 0.64 - 0.68 | High Risk |
| Mild Thinness | 17 - 18.5 | 0.68 - 0.74 | Moderate Risk |
| Normal | 18.5 - 25 | 0.74 - 1.00 | Low Risk |
| Overweight | 25 - 30 | 1.00 - 1.20 | Moderate Risk |
| Obese Class I | 30 - 35 | 1.20 - 1.40 | High Risk |
| Obese Class II | 35 - 40 | 1.40 - 1.60 | Very High Risk |
| Obese Class III | 40 - 40+ | 1.60 - 1.6+ | Extremely High Risk |
BMI (Body Mass Index) is a measure of body fat based on height and weight. It's calculated using the formula: BMI = weight (kg) / height² (m²). BMI helps assess if you're underweight, normal weight, overweight, or obese.
Our calculator uses WHO standards with 8 categories (from Severe Thinness to Obese Class III) and includes India-specific BMI ranges adjusted for Asian population genetics, plus BMI Prime calculation for optimal health assessment.
BMI = weight (kg) ÷ [height (m)]²
Or: weight (kg) ÷ [height (cm) ÷ 100]²
Example:
Weight: 70 kg
Height: 170 cm (1.7 m)
BMI = 70 ÷ (1.7)² = 70 ÷ 2.89
BMI = 24.2 (Normal Weight)
BMI = [weight (lbs) ÷ height (in)²] × 703
703 is the conversion factor
Example:
Weight: 154 lbs
Height: 5'7" (67 inches)
BMI = (154 ÷ 67²) × 703
BMI = 24.1 (Normal Weight)
Why different? Asian populations have higher body fat percentage at lower BMI compared to Caucasians. Indian standards are adjusted accordingly.
High Risk
Low Risk
Medium Risk
High Risk
Very High Risk
BMI Prime is a ratio of your actual BMI to the upper limit of normal BMI (25). It's a dimensionless number that makes BMI easier to interpret.
Formula:
BMI Prime = BMI ÷ 25
Interpretation:
Example: If your BMI is 30, your BMI Prime is 30÷25 = 1.2 (indicates obesity)
Health Risks:
Benefits:
Health Risks:
Serious Health Risks:
A healthy BMI range is 18.5 to 24.9 according to WHO standards. However, for Asian populations (including India), the healthy range is slightly lower at 18.0 to 22.9.
• Underweight: BMI less than 18.5
• Normal: BMI 18.5-24.9 (WHO) or 18.0-22.9 (Asia)
• Overweight: BMI 25-29.9 (WHO) or 23-24.9 (Asia)
• Obese: BMI 30 and above (WHO) or 25+ (Asia)
BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat mass, so it may:
❌ Not Accurate For:
✅ Good Indicator For:
🔻 To Lower BMI (Overweight/Obese):
• Diet: Calorie deficit (500-1000 cal/day), balanced nutrition
• Exercise: 150-300 min/week cardio + strength training
• Target: Lose 0.5-1 kg per week safely
• Hydration: Drink 3-4 liters water daily
• Sleep: 7-8 hours nightly for hormonal balance
🔺 To Increase BMI (Underweight):
• Diet: Calorie surplus (300-500 cal/day), protein-rich
• Exercise: Strength training to build muscle
• Target: Gain 0.25-0.5 kg per week
• Meals: 5-6 smaller meals throughout day
• Nutrients: Focus on healthy fats & complex carbs