Body mass index (BMI) is a measure of body fat based on height and weight that applies to adult men and women.
BMI Categories:

• Underweight = <18.5
• Normal weight = 18.5–24.9
• Overweight = 25–29.9
• Obesity = BMI of 30 or greater 

Check your BMI easily with the National Institutes of Health calculator.  Click on the "Visit this Website" link to go to the website.