Body fat percentage is a more accurate measurement of an individuals risk of weight-related diseases than BMI. According to the American Council on Exercise, the following ranges for body fat percentage apply to adults:

• Women:
  • Essential Fat: 0-12%
  • Athletes: 14-20%
  • Fitness: 21-24%
  • Acceptable: 25-31%
  • Obese: 32%+
• Men:
  • Essential Fat: 2-4%
  • Athletes: 6-13%
  • Fitness: 14-17%
  • Acceptable: 18-25%
  • Obese: 26%+

A BMI of over 30 indicates obesity. However, BMI is a rough estimate of body fat, and body fat percentage is a more accurate number. The downfall of body fat percentage as a measurement is that the methods of determining a person’s body fat percentage are not all equal, and the most accurate methods are not readily available. The best way to measure body fat involves using specialized equipment, usually in a doctor’s office. A doctor can use fat calipers to calculate fat percentages in specific areas of the body. There are several other accurate ways to assess body fat. These include underwater weighing, X-rays, and air displacement plethysmography.