Vsg Weight Loss Calculator

Estimate your potential weight loss after Vertical Sleeve Gastrectomy.

Current Weight (lbs):

Height (feet): Height (inches):

Target % Excess Weight Loss (e.g., 60-70% is common):

Your Estimated VSG Weight Loss

Current BMI:

Estimated Ideal Weight:

Excess Weight:

Estimated Weight Loss:

Estimated Post-Op Weight:

Achieved % Excess Weight Loss:

Disclaimer: This calculator provides an estimate based on common averages. Individual results vary significantly. Always consult with your bariatric surgeon and healthcare team for personalized advice and expectations.

function calculateVSGWeightLoss() { var currentWeightLbs = parseFloat(document.getElementById('currentWeightLbs').value); var heightFeet = parseFloat(document.getElementById('heightFeet').value); var heightInches = parseFloat(document.getElementById('heightInches').value); var targetEWL = parseFloat(document.getElementById('targetEWL').value); if (isNaN(currentWeightLbs) || currentWeightLbs <= 0 || isNaN(heightFeet) || heightFeet <= 0 || isNaN(heightInches) || heightInches = 12 || isNaN(targetEWL) || targetEWL 100) { alert('Please enter valid positive numbers for all fields. Height inches must be between 0 and 11.'); document.getElementById('vsgResult').style.display = 'none'; return; } // Convert height to meters var totalInches = (heightFeet * 12) + heightInches; var heightMeters = totalInches * 0.0254; // 1 inch = 0.0254 meters // Convert current weight to kg var currentWeightKg = currentWeightLbs * 0.453592; // 1 lb = 0.453592 kg // Calculate BMI var bmi = currentWeightKg / (heightMeters * heightMeters); // Calculate Ideal Body Weight (IBW) at BMI 25 // IBW = 25 * (height in meters)^2 var ibwKg = 25 * (heightMeters * heightMeters); var ibwLbs = ibwKg / 0.453592; // Calculate Excess Weight var excessWeightLbs = currentWeightLbs – ibwLbs; var excessWeightKg = currentWeightKg – ibwKg; if (excessWeightLbs 0) var ewlAchieved = (estimatedLossLbs / excessWeightLbs) * 100; // Display results document.getElementById('bmiResult').innerText = bmi.toFixed(1); document.getElementById('idealWeightResult').innerText = ibwLbs.toFixed(1) + ' lbs (' + ibwKg.toFixed(1) + ' kg)'; document.getElementById('excessWeightResult').innerText = excessWeightLbs.toFixed(1) + ' lbs (' + excessWeightKg.toFixed(1) + ' kg)'; document.getElementById('estimatedWeightLossResult').innerText = estimatedLossLbs.toFixed(1) + ' lbs (' + estimatedLossKg.toFixed(1) + ' kg)'; document.getElementById('postOpWeightResult').innerText = postOpWeightLbs.toFixed(1) + ' lbs (' + postOpWeightKg.toFixed(1) + ' kg)'; document.getElementById('ewlAchievedResult').innerText = ewlAchieved.toFixed(1) + '%'; document.getElementById('vsgResult').style.display = 'block'; }

Understanding Vertical Sleeve Gastrectomy (VSG) Weight Loss

Vertical Sleeve Gastrectomy (VSG), often simply called "gastric sleeve," is a popular bariatric surgery that helps individuals achieve significant and sustainable weight loss. It involves surgically removing about 80% of the stomach, leaving behind a banana-shaped "sleeve." This procedure restricts the amount of food you can eat and also impacts hunger-regulating hormones, leading to reduced appetite.

How VSG Leads to Weight Loss

The primary mechanisms of weight loss after VSG are:

Restriction: The smaller stomach capacity means you feel full much faster, consuming fewer calories.
Hormonal Changes: The removal of the fundus (the upper part of the stomach) significantly reduces the production of ghrelin, often called the "hunger hormone." This leads to decreased appetite and cravings.
Metabolic Improvements: VSG can lead to rapid improvements in conditions like type 2 diabetes, often before significant weight loss even occurs, due to changes in gut hormones that affect insulin sensitivity.

Factors Influencing VSG Weight Loss

While VSG is a powerful tool, individual weight loss results can vary. Several factors play a crucial role:

Adherence to Diet and Exercise: This is perhaps the most critical factor. Following the post-operative dietary guidelines and engaging in regular physical activity are essential for maximizing weight loss and maintaining it long-term.
Starting Weight and BMI: Individuals with higher starting weights and BMIs often lose more total pounds, but the percentage of excess weight lost might be similar across different starting points.
Age: Younger patients tend to lose weight more rapidly than older patients, though significant weight loss is achievable at any age.
Comorbidities: The presence of certain health conditions (e.g., diabetes, thyroid issues) can sometimes influence the rate and total amount of weight loss.
Psychological Factors: Addressing emotional eating, stress, and other psychological factors is vital for sustained success.
Metabolic Adaptation: The body's metabolism can adapt to weight loss, sometimes slowing down the rate of loss over time.

Typical Weight Loss Expectations

Weight loss after VSG typically follows a predictable pattern:

Rapid Initial Loss (First 3-6 Months): Most patients experience the most significant and rapid weight loss during this period, often losing 30-50% of their excess weight.
Continued Loss (6-18 Months): Weight loss continues at a slower pace, with many patients reaching their lowest weight around 12-18 months post-surgery. The average percentage of excess weight loss (%EWL) typically ranges from 50-70% by this time.
Plateau and Maintenance (18+ Months): After reaching the lowest weight, most patients enter a maintenance phase. It's common to regain a small amount of weight (5-10%) during this period, but successful long-term maintenance is very achievable with continued healthy habits.

The calculator above uses a "Target % Excess Weight Loss" to help you estimate your potential outcome. This percentage is a common metric used by bariatric professionals to gauge the success of the surgery. For example, if you have 100 lbs of excess weight and achieve 60% EWL, you would lose 60 lbs.

Using the VSG Weight Loss Calculator

Our calculator provides an estimate based on your current weight, height, and a target percentage of excess weight loss. Here's what each output means:

Current BMI: Your Body Mass Index, an indicator of body fat based on height and weight.
Estimated Ideal Weight: An approximation of a healthy weight for your height, typically calculated to achieve a BMI of 25.
Excess Weight: The difference between your current weight and your estimated ideal weight. This is the weight your body needs to lose to reach a healthy BMI.
Estimated Weight Loss: The projected amount of weight you could lose based on your chosen "Target % Excess Weight Loss" applied to your excess weight.
Estimated Post-Op Weight: Your estimated weight after achieving the calculated weight loss.
Achieved % Excess Weight Loss: The percentage of your excess weight that the estimated loss represents.

Remember, this calculator is a tool for estimation and discussion. Your actual weight loss journey will be unique and should be guided by your medical team.