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Advanced BMI Calculator

Calculate your Body Mass Index with advanced features including body frame analysis, ethnic adjustments, and personalized health recommendations based on WHO standards.

✓ WHO Standards
✓ Body Frame Analysis
✓ Ethnic Adjustments

BMI Calculator

Enter Your Details

Fill in your weight and height to calculate your BMI and get personalized health insights.

BMI Categories & Ranges

Severely Underweight
BMI Under 16
Underweight
BMI 16 - 18.4
Normal Weight
BMI 18.5 - 24.9
Overweight
BMI 25 - 29.9
Obese Class I
BMI 30 - 34.9
Obese Class II
BMI 35 - 39.9
Obese Class III
BMI 40+

Important Medical Disclaimer

This BMI calculator is for educational purposes only and should not replace professional medical advice. BMI does not account for muscle mass, bone density, or other factors that affect health. Always consult with a healthcare provider for personalized health assessments and recommendations.

BMI Calculator Examples

Normal Weight (Metric)

Healthy Adult

Weight: 70 kg
Height: 175 cm
Age: 30 years
BMI: 22.9
Normal Weight Range

Overweight (Imperial)

Above Healthy Range

Weight: 180 lbs
Height: 66 inches
Age: 25 years
BMI: 29.0
Overweight Category

Underweight (Metric)

Below Healthy Range

Weight: 45 kg
Height: 165 cm
Age: 22 years
BMI: 16.5
Underweight Category

Understanding BMI Calculations

Body Mass Index (BMI) is a screening tool that uses your height and weight to estimate body fat and assess weight categories. Our calculator provides instant BMI calculations with health risk assessments and personalized recommendations.

BMI Categories and Ranges

  • Underweight: BMI below 18.5 - May indicate nutritional deficiencies
  • Normal Weight: BMI 18.5-24.9 - Healthy weight range with low health risks
  • Overweight: BMI 25-29.9 - Above healthy range, increased health risks
  • Obese Class I: BMI 30-34.9 - Moderate obesity with significant health risks
  • Obese Class II: BMI 35-39.9 - Severe obesity requiring medical attention
  • Obese Class III: BMI 40+ - Extreme obesity with very high health risks

How to Use the BMI Calculator

  1. Choose your preferred unit system (metric or imperial)
  2. Enter your current weight accurately
  3. Input your height (without shoes for accuracy)
  4. Provide your age and gender for enhanced calculations
  5. Select body frame type if known (small, medium, large)
  6. Review your BMI result and health recommendations

Important Considerations

BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat mass, doesn't account for bone density, and may not be accurate for athletes, elderly individuals, or certain ethnic groups. Always consult healthcare providers for personalized health assessments.

BMI Calculation Examples

• 70kg, 175cm → BMI 22.9 (Normal Weight) - Healthy range with low risks

• 180lbs, 66in → BMI 29.0 (Overweight) - Weight reduction recommended

• 45kg, 165cm → BMI 16.5 (Underweight) - May need healthy weight gain

• 90kg, 180cm → BMI 27.8 (Overweight) - Lifestyle modifications beneficial

• 200lbs, 70in → BMI 28.7 (Overweight) - Close to obesity threshold