How Much Weight Will I Lose With Gastric Sleeve Surgery

Weight loss is almost always the primary goal and the most critical measurement of every bariatric surgery – including the one and only gastric sleeve surgery.

Gastric sleeve surgery (VSG) uses restriction as the sole method of weight loss. Surgeons remove 80-85% of the stomach, leaving behind a very small banana-shaped sleeve. This also reduces the production of the hunger hormone, Ghrelin, meaning less cravings.

The question all patients ask is “How much weight will I lose with gastric sleeve surgery?” We will show you a simple formula to calculate your expected weight loss after gastric sleeve in Mexico.

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How to Project Your Expected Weight Loss?

The amount of weight you will lose with a gastric sleeve depends on a number of factors. These include current weight, gender, age, health, nutrition, exercise, lifestyle, and commitment to changing old habits. The surgeon’s skills and experience, including the size of your new stomach, can also affect total weight loss.

Suppose you’re doing everything right. You’ve changed your diet and created new healthy habits. Practice regularly. On average, people lose 65% of their excess weight with gastric sleeve surgery in Tijuana, Mexico. This includes people who followed their post-op guidelines and people who did not follow them. If you follow the guidelines, change the bad habits, replace them with new healthy habits, and you can expect to lose 65% of excess body weight with gastric sleeve.

Estimate Your Expected Gastric Sleeve Weight Loss

Ideal Weight Loss with Gastric Sleeve Surgery

Ideal Body Weight Chart

Here is a formula to calculate your expected weight loss. Follow steps 1 to 4 and you should have the expected weight loss calculated in a few minutes.

Step 1: Your Ideal Body Weight

There are some common ways to calculate the ideal weight. However, the chart below shows the ideal weight for males and females of different heights with different frame sizes.

Step 2: Maximum Weight You’ll Lose*

Current Weight – Ideal Weight = Excess Weight

Step 3: Calculate Expected Weight Loss

Excess Weight x 0.65 = Expected Weight Loss

Step 4: Calculate Your New Weight

Current Weight – Expected Weight Loss = New Weight After Surgery

Expected Weight Loss with Gastric Sleeve Surgery

It is impossible to tell patients the exact number of pounds they drop after gastric sleeve surgery, as everybody is different. Excess weight loss depends on height, weight, and BMI, among other factors.  An individual who is taller and weighs more will likely lose more weight than someone shorter and smaller. Although, both patients can expect to lose a similar percentage of their excess weight.

We analyzed postoperative weight loss of gastric sleeve recipients based on a 2022 survey. Here we showcase the 3-month, 6-month, and 1-year breakdown of over 900+ past patients’ expected weight loss (lbs).

Gastric Sleeve Monthly Average Weight Loss

A 2012 review by Fischer et al. analyzed data from 123 studies of 12,129 vertical gastrectomy patients. The percentage of excess weight loss (%EWL) in patients with gastric sleeve was on average 59% at 1 year, 54.5% at 2 years, and 66% at 3 years after surgery (Fischer et al., 2012). Since 2012, the effectiveness and success rate have significantly increased.

At Mexico Bariatric Center®, we have seen at least 65% or higher excess weight loss one year after gastric sleeve surgery.

How Much Weight Will I Lose with Gastric Sleeve - Excess Weight Loss Timeline Chart

Average Weight Loss with Gastric Sleeve Surgery

Regardless of the weight-loss operation you choose, you can expect a certain amount of weight to lose with gastric sleeve surgery or any other bariatric operation. This calculator will tell you how much weight you can expect to lose from every bariatric procedure and what you can expect to weigh two years after surgery.

Calculations are based on the average weight loss per procedure. To lose weight, you will need to follow the preoperative and postoperative guidelines of your surgeon.

Long-Term Gastric Sleeve Success

Long-term dietary and exercise changes along with other changes in habits can result in a weight loss that exceeds the average values used in these calculations.

Keep in mind that 65% of EWL is on average. There are people who lose less and others who lose much more. Finally, the success of gastric sleeve surgery in Tijuana, Mexico has just set the right expectations, decided to change its habits and abide by those decisions.

Plateau or Weight Gain

If your weight is lower than expected, don’t be upset with yourself. People are surprised that they can not expect to go from 250 kilograms to 120 kilograms of surgery alone. Patients need to understand that weight loss surgery such as gastric sleeve is not a magic bullet. Instead, the operation is a tool that will help you manage something more easily.

When weight falls, it becomes easier to exercise, stay longer, enjoy life, and continue to focus on losing weight with your new sleeved stomach. The hardest part is losing the first 50 kilograms of weight. When you begin to notice the results, this will motivate you to lose more, eat healthier, boast about your friends, and show your amazing progress.

Gastric Sleeve Expected Weight Loss Timeline - Full Procedure

What Can You Expect Realistically?

Patients must have reasonable expectations and set realistic goals for a successful weight loss journey. The outcome of gastric sleeve procedure is patient-specific. The amount of fat loss is influenced by many factors, such as the surgeon’s technical skill and the patient’s ability to maintain healthy eating habits and stay active.

Although our chronology of average weight loss was supposed to give an idea, it’s just average weight loss. The amount of weight you can actually lose with gastric sleeve surgery can be more or less. Ultimately, it was up to you and how difficult and complex you are. Are you following the postoperative diet? Did you regularly practice your routine? Many variables contribute to your planned weight loss; Many will depend on the problems you can control.

Am I Losing Enough Weight?

What if you do not seem to lose enough weight after your stomach? It is possible that many problems are involved here, but it is important to adhere to the advice of your surgeon and nutritionist. Remember, everyone is different and will have mixed results.

Gastric Sleeve in Mexico

Gastric sleeve in Mexico is a very effective way for Americans, Canadians, etc. to get quality-driven, safe bariatric surgery for an affordable price. Mexico Bariatric Center® provide bariatric surgery, including gastric sleeve in Mexico at one of the lowest prices, while having the top-quality, board-certified surgeons with over 10,000 bariatric surgeries combined.

Healthcare in Mexico, also known as medical tourism is a great option. Contact Mexico Bariatric Center today.


Fischer, L., Hildebrandt, C., Bruckner, T., Kenngott, H., Linke, G. R., Gehrig, T., … Buchler, M. W. (2012, May). Excessive weight loss after sleeve gastrectomy: a systematic review. – PubMed – NCBI. Retrieved from

Related Resources:

Gastric Sleeve Infographic Weight Loss