BMI Calculator
A Guide to the BMI Calculator
The Body Mass Index (BMI) is a standard measure used to gauge whether a person has a healthy body weight for their height. It's a useful tool to get a general idea of your weight status.
How to Use
Select your preferred unit system (Metric or US), then enter your age, gender, height, and weight. Click the 'Calculate' button to see your results.
Understanding the Results
The calculator will display your BMI value and the corresponding weight category based on the World Health Organization (WHO) classification.
BMI Categories (WHO Standard)
| Category | BMI Range (kg/m²) |
|---|---|
| Underweight | < 18.5 |
| Normal Weight | 18.5 - 24.9 |
| Overweight | 25.0 - 29.9 |
| Obesity (Class I) | 30.0 - 34.9 |
| Obesity (Class II) | 35.0 - 39.9 |
| Obesity (Class III) | ≥ 40.0 |
Important Disclaimer
BMI is a useful screening tool but it does not differentiate between fat and muscle. For athletes or very muscular individuals, BMI may overestimate body fat. Conversely, it may underestimate body fat in older adults who have lost muscle mass. Therefore, BMI should be used as a reference and considered alongside other health indicators. Please consult a doctor for health concerns.