Body mass index (BMI) definition
Body Mass Index (BMI) is a key indicator that correlates weight with height. The National Institutes of Health (NIH) now describes normal weight, overweight and obesity based on BMI instead of the regular height/weight chart.
- Women’s BMI is 27.3 or higher, and men’s BMI is 27.8 or higher.
- Obesity is a BMI of 30 or higher for any sex (about 30 pounds overweight).
- Muscular people may have a higher BMI without health risks.