Body Mass Index (BMI) Calculator
Enter your height and weight below to find your body mass index (BMI). This number is commonly used to judge whether your weight is healthy.
Calculate Your BMI
What the Numbers Mean
| BMI | Condition |
|---|---|
| Below 18.5 | Underweight |
| 18.5-24.9 | Normal weight |
| 25-29.9 | Overweight |
| 30 and higher | Obese |
If you are overweight or obese, even a small weight loss (10% of your current weight) can lower your risk of several diseases. People who are overweight or obese have a greater chance of developing several types of cancer—including colorectal cancer and breast cancer (for women past menopause)—as well as high blood pressure, high blood cholesterol or other lipid disorders, diabetes, heart disease, and stroke.
Being very underweight – especially if you’ve had rapid or unintentional weight loss – can be a sign of health problems.
A doctor can further assess your personal risk for serious weight-related diseases by considering your BMI, waist size, and other measures of health such as your blood sugar level.
More Interactive Tools
- How Many Calories Do You Need?
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- Compute your best workout with the Target Heart Rate Calculator.