BMI Calculator
Find your body mass index and the healthy weight range for your height. For adults 20 and older.
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BMI
- Category
- Healthy weight for your height
- BMI Prime
- Note
- Work
Saved Calculations
Items you add are saved in this browser.
| Name | Calculation | Result | Remove |
|---|
How BMI Is Calculated
BMI = weight (kg) ÷ height (m)² = 703 × weight (lb) ÷ height (in)²
| BMI | Adult category (CDC) |
|---|---|
| Under 18.5 | Underweight |
| 18.5 to under 25 | Healthy weight |
| 25 to under 30 | Overweight |
| 30 to under 35 | Obesity class 1 |
| 35 to under 40 | Obesity class 2 |
| 40 or higher | Obesity class 3 (severe) |
Worked Example
Tips
BMI is a screening number, not a diagnosis. It can overestimate body fat in athletes and underestimate it in older adults. Talk with a health care provider about what’s right for you.