How Much Weight Will You Lose From Gastric Sleeve Surgery

The amount of weight you lose from having gastric sleeve surgery depends on many factors, including your current weight, gender, and health. For patients who follow the Sleeve Clinic’s surgical aftercare program.

On an average, you can expect to lose approximately 25 to 35 percent of your body weight or 55-75% of your excess weight.

Excess body weight is determined by subtracting your current weight from your ideal weight. Gastric bypass surgery, like the gastric sleeve procedure, is a tool to aid in weight loss and improve health. With the right mindset and dedication, it can be a life-changing decision.

Gastric Sleeve Weight Loss Calculator

 This calculator will tell you how much you can expect to lose after having a sleeve gastrectomy. Our gastric sleeve weight loss surgery calculator is designed to provide an estimate of how much weight you can lose as a percentage of your excess weight. For a bariatric patient, this tool can help you set realistic expectations and plan your weight loss journey effectively. It’s important to remember that these figures are estimates and individual results can vary.


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.

Make it Happen with Easy and Convenient Financing Options

You shouldn’t have to delay this life-changing surgery simply because of the price.
That’s why we’ve made financing available to all of our patients. Have the procedure now and make lower monthly payments over time. Download our comprehensive pricing package to find out more.