Diet doctors use a calculation called Body Mass Index or BMI to determine if you are under weight, healthy weight, overweight, obese, morbidly obese or super obese. Your Body Mass Index is calculated by multiplying your weight in pounds by 703, dividing by your height in inches, and dividing by your height in inches again. Or just Google Body Mass Index, or Google BMI, and go to the National Institutes of Health website. Enter your height and weight in the National Institutes of Health BMI calculator, and it will tell you what your BMI is. If your BMI is under 18.5, you are underweight. If your BMI is between 18.5 and 24.9, you are healthy weight. If your BMI is between 25 and 29.9, you are overweight. If your BMI is over 30, you are obese. If your BMI is over 35 or over 40 (we are fighting about the number here), you are morbidly obese. If your BMI is over 45 or over 50 (we are fighting about this one too), you are super-obese. In English, if your BMI is over 25 you’re fat. If your BMI is over 30, you’re fat and in trouble. If your BMI is over 35 or over 40, you’re real fat and in real trouble. If your BMI is over 45 or over 50, take the donut out of your mouth, and see your doctor.