What is the Body Mass Index?

Your body mass index (BMI) is an indicator of your total body fat, which is related to your risk of developing or dying from a weight-related disease.

While there are some limitations with BMI calculators, they do provide you with an idea of how overweight you may be.

You are eligible to be considered for Weight loss surgery if your BMI is:

  • Between 30 and 34.9 with obesity-related diseases, for Lap-Band® only.
  • Between 35 and 39.9 with obesity-related diseases.
  • Equal to, or above, 40.

How to Use the BMI calculator

  1. Enter your height to the nearest inch.
  2. Enter your weight to the nearest pound. (Nobody sees the results, so be honest.)
  3. Click the “Calculate My BMI” button.

The BMI is calculated by dividing the patient’s weight in pounds by the square of the height in inches, then multiplying that number by a correction factor of 703. (Example: the BMI of a patient who is 250 pounds and 60 inches tall would be   250 / (60)2 = 0.0694. Then multiply this number by 703 = BMI 48.8.) This BMI usually corresponds to approximately 100 pounds overweight. Using this formula, BMIs can easily be calculated with a pocket calculator.