Advanced tool tailored for gastric sleeve patients and clinicians. Project excess weight loss by month after surgery date. Include height, age, gender, preoperative BMI, and lifestyle factors. Compare conservative, typical, and aggressive progress curves instantly. Support counseling, tracking, and motivation with clear visual guidance.
Example: Female, 35 years, 165 cm, 125 kg at surgery, target BMI 27, typical profile, primary sleeve, medium adherence.
| Month | Estimated EWL % | Estimated TBWL % | Projected Weight (kg) |
|---|---|---|---|
| 3 | ~33% | ~14% | ~107 kg |
| 6 | ~50% | ~23% | ~96 kg |
| 9 | ~65% | ~30% | ~88 kg |
| 12 | ~72% | ~33% | ~84 kg |
This calculator models outcomes using Excess Weight Loss (EWL) and Total Body Weight Loss (TBWL), based on your starting weight, height, target BMI, and selected profile.
Values are educational estimates, not personalized medical predictions. Always confirm with your bariatric care team.
Most patients lose weight fastest in the first 6 to 9 months. The curve then slows toward 12 to 18 months as they approach a sustainable range. This calculator mirrors that evidence-based pattern.
Results depend on baseline BMI, age, hormones, medications, sleep, surgery technique, protein intake, hydration, and physical activity. The adjustable profile, surgery type, and adherence options simulate realistic ranges instead of a single rigid curve.
Use projections for expectation setting, shared decision making, early plateau detection, and structured follow-up planning. Exported CSV or PDF helps document counseling and supports long-term engagement with nutrition, behavior, and activity goals.
It is a structured projection tool that converts your height, weight, target BMI, and clinical context into month-by-month expected outcomes. It translates complex bariatric data into clear numbers patients and clinicians can interpret quickly during consultations.
Regularly comparing actual weight to projected curves highlights early stalls, excessive loss, or regain risk. Teams can adjust nutrition plans, lab monitoring, supplementation, and physical activity prescriptions using objective trends instead of relying only on impressions.
If your weight is consistently far above or below projections, if symptoms like vomiting, dizziness, weakness, or hair loss appear, or if rapid regain occurs, contact your bariatric surgeon or specialist team promptly for individualized assessment.
This calculator supports—not replaces—professional medical advice and supervision.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.