How Much Weight Can You Expect to Lose?

The amount of weight you lose from gastric sleeve surgery depends on many factors, including your current weight, gender, and health. On average, patients who follow the Sleeve Clinic’s surgical aftercare program can expect to lose approximately 55-75% of their excess weight.

This calculator will tell you how much you can expect to lose as a percentage of your excess weight.

Weight Loss Calculator

What is your gender?*


  • Current Weight
  • BMI
  • Weight Class

Your *estimated weight loss and new weight 18 to 24 months following surgery is:

  • Your estimated weight loss*
  • *Estimated new weight

Average Weight Lost
Upper Range Weight Lost
Lower Range Weight Lost


60% of excess body weight lost

Upper range

70% of excess body weight lost

Lower range

50% of excess body weight lost

*DISCLAIMER: Weight loss results can vary depending on the individual. There is no guarantee of specific results. Whether genetic or environmental, it should be noted that food intake, rates of metabolism and levels of exercise and physical exertion vary across individuals. This means weight loss results will also vary from person to person.

Find out if gastric sleeve surgery is the best option for you.

You do not qualify for Gastric Sleeve surgery based on your current BMI and body type.

Your weight exceeds the limit for private, out-of-hospital surgery. Please speak with your family doctor for a referral to the Ontario Bariatric Network.