BMI Calculator
Body Mass Index
BMI Chart Online
Understanding BMI ranges is crucial for assessing health risks. Here's a complete breakdown of all BMI categories. Use our BMI Calculator to find your BMI, or learn more about the BMI Formula.
| BMI Range | Category | Health Implications |
|---|---|---|
| Below 18.5 | Underweight | May indicate malnutrition or other health concerns |
| 18.5 - 24.9 | Normal weight | Generally considered healthy weight range |
| 25.0 - 29.9 | Overweight | May increase risk for certain health conditions |
| 30.0 - 34.9 | Obese Class I | Moderate risk for obesity-related health issues |
| 35.0 - 39.9 | Obese Class II | High risk for obesity-related health issues |
| 40.0 and above | Obese Class III | Very high risk for obesity-related health issues |
Important Notes
- BMI is calculated as weight (kg) divided by height (m) squared
- These ranges apply to adults aged 20 and older
- BMI does not account for muscle mass, bone density, or body composition
- Athletes and bodybuilders may have higher BMI due to muscle mass
- Consult healthcare professionals for personalized health assessments
For more information, see our Healthy BMI Guide or calculate your BMI.
Medical Disclaimer
Important: BMI is a screening tool, not a diagnostic tool. It provides an estimate of body fat based on height and weight but does not directly measure body fat percentage, muscle mass, bone density, or overall health.
BMI should not be used as the sole indicator of health. Many factors influence health beyond BMI, including:
- Body composition (muscle vs. fat)
- Waist circumference and body fat distribution
- Physical fitness and activity levels
- Medical history and family history
- Blood pressure, cholesterol, and blood sugar levels
- Lifestyle factors (diet, exercise, sleep, stress)
This calculator provides educational information only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider for personalized health guidance, especially if you have concerns about your weight or health status.