By knowing your Body Mass Index (BMI) you can discover whether you are overweight, underweight or have an ideal weight. Your BMI can be worked out using a simple formula which calculates the ratio of body weight and the square of height:
| Body Mass Index |
|---|
| 18.5 | Underweight |
| 18.5 - 24.9 | Normal weight |
| 25.0 - 29.9 | Slight to intermediate overweight |
| 30.0 - 39.0 | Serious overweight |
| 40 | Seriously hazardous overweight |