BMI Calculator
Your BMI
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Guide to the BMI Calculator
This BMI Calculator (Body Mass Index) uses your height and weight to quickly calculate your BMI score, helping you scientifically assess your weight status based on World Health Organization (WHO) standards.
How to use the BMI Calculator
- Select your preferred unit system (metric or imperial).
- Enter your gender, age, height, and weight.
- Click the 'Calculate' button to see your BMI value and classification.
Understanding the Results
- BMI Value: Your Body Mass Index.
- BMI Category: The weight category corresponding to your BMI.
BMI Categories (WHO Standard)
These weight classifications are based on the World Health Organization (WHO) recommendations for adults. This standard applies to both men and women aged 20 and older.
| Classification | 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 |
About BMI
What is BMI?
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.
Why BMI Matters?
According to the World Health Organization (WHO) fact sheet on Obesity and overweight, in 2022, 1 in 8 people in the world were living with obesity. Since 1990, adult obesity has more than doubled, and adolescent obesity has quadrupled. Obesity increases the risk of type 2 diabetes, heart disease, and certain cancers, significantly affecting quality of life.
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.