BMI Calculator
Calculate your Body Mass Index (BMI) to check if you're a healthy weight for your height.
Understanding Your BMI Result
Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults. It is defined as the weight in kilograms divided by the square of the height in meters (kg/m2).
BMI Categories
| Category |
BMI Range (kg/m²) |
| Underweight |
< 18.5 |
| Normal weight |
18.5 – 24.9 |
| Overweight |
25 – 29.9 |
| Obesity |
≥ 30 |
How is BMI calculated?
Metric Formula: BMI = weight (kg) / [height (m)]2
Imperial Formula: BMI = 703 x weight (lbs) / [height (in)]2
Note: BMI is a screening tool, not a diagnosis of body fatness or health. Factors such as muscle mass, age, and ethnicity can affect the accuracy of BMI.