Bariatric Surgery Weight Loss Calculator (New Zealand)
Calculate expected weight loss trajectory post-bariatric surgery. Covers Sleeve Gastrectomy (VSG), Roux-en-Y Bypass (RNY), and Duodenal Switch (DS).
Projections Post-Bariatric Surgery
Bariatric surgery (such as Sleeve Gastrectomy or Gastric Bypass) is an effective medical intervention for severe obesity. It restricts food intake and alters metabolic hormones to support weight loss.
Expected weight loss is typically measured as a percentage of Excess Body Weight (EBW). Patients generally lose 50% to 70% of their excess weight within the first 12 to 18 months following the procedure.
This calculator provides estimated weight loss trajectories based on statistical clinical averages. Achieving and maintaining these targets requires strict adherence to dietary guidelines, including high protein intake and lifelong vitamin supplementation.
Frequently Asked Questions
Q: How much weight do you lose after VSG surgery?
On average, patients lose 50% to 60% of their excess body weight within the first year after a Vertical Sleeve Gastrectomy.
Q: What is excess body weight?
Excess body weight is your current weight minus your ideal body weight (based on a healthy BMI of 25).