With Gastric Sleeve Surgery you're estimated to lose 62 lbs over 12-18 months. Ideal Body Weight (IBW) represents the weight a person should be for their height. Excess Body Weight (EBW) is the amount of weight a person is over their IBW., To calculate your potential weight loss: Determine excess weight by subtracting IBW from current weight. Apply the expected loss percentage based on time post-surgery. For a 5’8″ woman weighing 250 lbs: What is the 30/30 rule after gastric sleeve? The 30/30 rule is a post-operative guideline that recommends: Daily Schedule:, Here’s a graph of average weight loss in sleeves at 3, 6, 9, 12, 18 and 24 months. Many factors can influence your weight loss results after gastric sleeve surgery. These include initial weight, diet, lifestyle, age, race, health problems and the surgeon’s skill., How Much Weight Will I Lose Per Month? The majority of gastric sleeve patients drop an average of 60-70% of their excess weight in a year. In two years, you may lose up to three-quarters of your excess weight., One Swiss study showed that patients lost on average more than 57% of their excess body weight after having the gastric sleeve. While some of these numbers are lower than others, it is clear that patients do lose a lot of weight and quickly after this weight loss surgery., During this procedure, about 80% of your stomach is removed, leaving a banana-shaped “sleeve” that restricts food intake. The bariatric surgery average weight loss with sleeve gastrectomy is typically 60-70% of excess weight within the first two years..