BMI Calculator
kg
cm
Quick Reference:
Underweight: Below 18.5
Normal weight: 18.5 - 24.9
Overweight: 25 - 29.9
Obese: 30 and above
Underweight: Below 18.5
Normal weight: 18.5 - 24.9
Overweight: 25 - 29.9
Obese: 30 and above
Understanding BMI (Body Mass Index)
BMI is a widely used screening tool that measures body fat based on height and weight. It helps assess whether a person has a healthy body weight for their height. While BMI is a useful indicator, it should be considered alongside other health factors.
BMI Calculation Formula:
Metric System: BMI = Weight (kg) ÷ Height² (m²)Imperial System: BMI = (Weight (lbs) ÷ Height² (inches²)) × 703
BMI Categories & Health Implications
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Possible nutritional deficiency |
| 18.5 - 24.9 | Normal Weight | Low health risk |
| 25.0 - 29.9 | Overweight | Increased health risk |
| 30.0 - 34.9 | Obese Class I | High health risk |
| 35.0 - 39.9 | Obese Class II | Very high health risk |
| 40.0 and above | Obese Class III | Extremely high health risk |
💡 Important Notes:
- BMI doesn't distinguish between muscle and fat mass
- Athletes with high muscle mass may have high BMI but low body fat
- Age, gender, and ethnicity can affect BMI interpretation
- BMI may not be accurate for pregnant women, children, or elderly individuals
⚠️ Medical Disclaimer: This BMI calculator is for informational purposes only and should not replace professional medical advice. BMI is just one indicator of health. For comprehensive health assessment, consult with a healthcare professional who can consider your complete medical history, lifestyle, and other health factors.