Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults.
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Examples and limits
With a height of 175 cm and weight of 70 kg, the BMI is about 22.9. Height and weight must be positive finite numbers. This is a screening reference, not medical advice, and values stay in the browser.
How to use
Enter height and weight, then calculate. The result is generated locally in the browser; use the clear action to remove the current inputs and result.
BMI Categories (WHO Standard)
- Underweight: < 18.5
- Normal weight: 18.5 - 24.9
- Overweight: 25.0 - 29.9
- Obesity: >= 30.0
Note: BMI is a useful measure of overweight and obesity. It is calculated from your height and weight. BMI is an estimate of body fat and a good gauge of your risk for diseases that can occur with more body fat.