Body Mass Index (BMI) is a practical method to assess body fat. As an individual’s BMI increases, so does his or her risk for a variety of diseases and conditions, such as high blood pressure, diabetes, and heart disease. While BMI can be used for most men and women, it does have some limitations:
It may overestimate body fat in athletes and others who have a muscular build.
It may underestimate body fat in older persons and others who have lost muscle.
Wake Research Associates BMI Calculator
Underweight = <18.5
Normal weight = 18.5–24.9
Overweight = 25–29.9
Obesity = BMI of 30 or greater