Measuring Obesity
Obesity in adults is measured by various means, but the most common methods used are body mass index (BMI) and waist circumference. There is no perfect method to measuring obesity, however these two indicators are most commonly used by clinicians as a tool to diagnose weight in adults.

BMI
BMI is a measurement used to indicate obesity and morbid obesity in adults. BMI is calculated by dividing a person's weight in kilograms by his or her height in meters squared. An adult with a BMI of 30 or greater is considered obese.

Once you find your measurement, you will want to find your weight classification that is accompanied on the BMI chart or calculator. Knowing your BMI is a good starting point in addressing your weight. If you find you are in an unhealthy range, you will want to talk with your doctor to address this issue.

There is not a separate BMI chart used for men and women. Both sexes use the same chart to measure obesity. In addition, the same classifications of obesity apply to both men and women. Click here to calculate your BMI.

Waist Circumference
Waist circumference is a less-common method used to measure obesity in an individual. This simple measurement indicates obesity and morbid obesity in adults by measuring your waist. To you’re your waist circumference, wrap a tape measure around the area above your hip bone and below your rib cage.

For females, a waist circumference of 35 inches or greater is considered unhealthy. For men, a waist circumference of 40 inches or greater is considered unhealthy. There is not a classification chart or various ranges used with this method to determine obesity. Only the simple thresholds for men and women noted above apply.

Measuring Obesity in Children
To learn about measuring childhood obesity in children, please click here.