For long term weight loss results on average, patients who undergo Sleeve Gastrectomy experience 60-80% loss of excess weight. The rate of weight loss is generally quite predictable following the operation. In the first month it will be in the range of 6-10 kgs of weight loss. By 3 months, we expect to reach around 18 kgs of weight loss on an average. By 6 months, it would be in the range of 22 -26 kgs. And thereafter 2-3 kgs a month until the target weight is reached.