Weight Loss Percentage Calculator Excel Template

Weight Loss Percentage Calculator Excel Template :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-color: #ddd; –card-background: #fff; –shadow-color: rgba(0, 0, 0, 0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); margin: 0; padding: 20px; line-height: 1.6; } .container { max-width: 960px; margin: 0 auto; background-color: var(–card-background); padding: 30px; border-radius: 8px; box-shadow: 0 4px 15px var(–shadow-color); display: flex; flex-direction: column; } header { text-align: center; margin-bottom: 30px; padding-bottom: 20px; border-bottom: 1px solid var(–border-color); } h1 { color: var(–primary-color); font-size: 2.5em; margin-bottom: 10px; } h2, h3 { color: var(–primary-color); margin-top: 25px; margin-bottom: 15px; font-size: 1.8em; } h3 { font-size: 1.4em; } .calculator-section { margin-bottom: 40px; padding: 30px; background-color: #fdfdfd; border-radius: 6px; border: 1px solid var(–border-color); } .loan-calc-container { display: flex; flex-direction: column; gap: 20px; } .input-group { display: flex; flex-direction: column; gap: 8px; } .input-group label { font-weight: bold; color: #555; } .input-group input, .input-group select { padding: 12px 15px; border: 1px solid var(–border-color); border-radius: 4px; font-size: 1em; transition: border-color 0.3s ease; } .input-group input:focus, .input-group select:focus { border-color: var(–primary-color); outline: none; } .input-group .helper-text { font-size: 0.85em; color: #777; } .input-group .error-message { color: #dc3545; font-size: 0.8em; margin-top: 5px; display: none; /* Hidden by default */ } .error-message.visible { display: block; } .button-group { display: flex; gap: 15px; margin-top: 25px; flex-wrap: wrap; /* Allow buttons to wrap on smaller screens */ } .button-group button { padding: 12px 25px; border: none; border-radius: 5px; font-size: 1em; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; white-space: nowrap; /* Prevent button text from wrapping */ } .button-group button.primary { background-color: var(–primary-color); color: white; } .button-group button.primary:hover { background-color: #003366; transform: translateY(-2px); } .button-group button.secondary { background-color: #6c757d; color: white; } .button-group button.secondary:hover { background-color: #5a6268; transform: translateY(-2px); } .button-group button.reset { background-color: #ffc107; color: #333; } .button-group button.reset:hover { background-color: #e0a800; transform: translateY(-2px); } #results { margin-top: 30px; padding: 25px; background-color: var(–primary-color); color: white; border-radius: 6px; text-align: center; box-shadow: inset 0 2px 5px rgba(0,0,0,0.2); } #results h3 { color: white; margin-top: 0; font-size: 1.6em; } #primaryResult { font-size: 2.5em; font-weight: bold; margin: 15px 0; display: block; background-color: var(–success-color); padding: 10px 15px; border-radius: 4px; display: inline-block; /* To fit content */ } .intermediate-results { display: flex; justify-content: center; gap: 20px; margin-top: 20px; flex-wrap: wrap; } .intermediate-value { background-color: rgba(255, 255, 255, 0.2); padding: 10px 15px; border-radius: 4px; text-align: center; } .intermediate-value .label { font-size: 0.9em; opacity: 0.8; display: block; margin-bottom: 5px; } .intermediate-value .value { font-size: 1.3em; font-weight: bold; display: block; } .formula-explanation { margin-top: 20px; font-size: 0.95em; opacity: 0.85; } .chart-container { margin-top: 30px; padding: 25px; background-color: var(–card-background); border-radius: 6px; border: 1px solid var(–border-color); text-align: center; } canvas { max-width: 100%; height: auto; /* Maintain aspect ratio */ } .chart-caption { font-size: 0.9em; color: #777; margin-top: 10px; } table { width: 100%; border-collapse: collapse; margin-top: 30px; margin-bottom: 40px; } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid var(–border-color); } th { background-color: var(–primary-color); color: white; font-weight: bold; } td { background-color: var(–card-background); } tr:nth-child(even) td { background-color: #f2f2f2; } .article-content { margin-top: 40px; padding-top: 30px; border-top: 1px solid var(–border-color); } .article-content h2, .article-content h3 { color: var(–primary-color); margin-top: 30px; margin-bottom: 15px; } .article-content p { margin-bottom: 15px; } .article-content ul, .article-content ol { margin-bottom: 15px; padding-left: 25px; } .article-content li { margin-bottom: 8px; } .article-content strong { color: var(–primary-color); } .internal-links { margin-top: 40px; padding-top: 30px; border-top: 1px solid var(–border-color); } .internal-links ul { list-style: none; padding: 0; } .internal-links li { margin-bottom: 15px; } .internal-links a { color: var(–primary-color); text-decoration: none; font-weight: bold; } .internal-links a:hover { text-decoration: underline; } .internal-links .explanation { font-size: 0.9em; color: #555; display: block; margin-top: 5px; } @media (max-width: 768px) { .container { padding: 20px; } h1 { font-size: 2em; } .button-group { flex-direction: column; align-items: stretch; } .button-group button { width: 100%; } .intermediate-results { flex-direction: column; gap: 15px; } }

Weight Loss Percentage Calculator Excel Template

Effortlessly calculate your weight loss percentage and track your progress with our intuitive tool, designed to mimic the functionality of a valuable Excel template.

Weight Loss Percentage Calculator

Enter your starting weight in kilograms (kg) or pounds (lbs).
Enter your current weight in the same units as your initial weight.

Your Progress Summary

Total Weight Lost
Percentage Lost
Remaining to Goal (if applicable)

Weight Loss Percentage = ((Initial Weight – Current Weight) / Initial Weight) * 100

Total Weight Lost = Initial Weight – Current Weight

Weight Loss Trend

Visualizing your weight change over time.

Weight Loss Data

Metric Value Unit
Initial Weight kg/lbs
Current Weight kg/lbs
Total Weight Lost kg/lbs
Weight Loss Percentage %

What is a Weight Loss Percentage Calculator Excel Template?

A Weight Loss Percentage Calculator Excel Template is a digital tool, often pre-formatted in spreadsheet software like Microsoft Excel or Google Sheets, designed to help individuals meticulously track and quantify their weight loss progress. It allows users to input their starting weight and their current weight, and then automatically computes the total amount of weight lost and, crucially, the percentage of total body weight that has been shed. This percentage is often considered a more meaningful metric than absolute weight lost, as it contextualizes the loss relative to the individual's starting point. For instance, losing 10 pounds might represent a significant achievement for someone starting at 130 pounds, but a less substantial change for someone starting at 250 pounds. The "Excel template" aspect implies that the user is either downloading a pre-built spreadsheet or using a web-based calculator that functions similarly, providing organized data and clear calculations, much like a well-structured Excel sheet.

Who Should Use It?

Anyone embarking on a journey to lose weight can benefit from a weight loss percentage calculator. This includes individuals:

  • Aiming for specific health improvements (e.g., managing conditions like diabetes, high blood pressure).
  • Preparing for an event or striving for aesthetic goals.
  • Seeking to understand the true scale of their progress beyond just the number on the scale.
  • Working with nutritionists or personal trainers who emphasize percentage-based progress.
  • Those who appreciate structured tracking and data-driven motivation, mirroring the benefits of using an Excel template for weight loss tracking.

Common Misconceptions

  • It's just about the number on the scale: While the calculator focuses on weight, sustainable weight loss involves more than just shedding pounds – muscle gain, body composition changes, and overall health are also critical.
  • A high percentage loss is always good: Rapid, unsustainable weight loss can be detrimental. The calculator shows the percentage, but not the health or method behind it.
  • It replaces professional advice: This tool is for tracking; it doesn't provide medical or nutritional guidance. Always consult healthcare professionals.
  • One size fits all: The effectiveness of weight loss and the meaning of a certain percentage can vary greatly based on individual physiology, genetics, and health status.

Weight Loss Percentage Formula and Mathematical Explanation

The core of the weight loss percentage calculator relies on a straightforward yet powerful formula that expresses the amount of weight lost as a proportion of the initial weight. This provides a standardized way to measure progress.

Step-by-Step Derivation

  1. Calculate Total Weight Lost: First, determine the absolute difference between the starting weight and the current weight. This gives you the total amount of weight shed.
    Formula: Total Weight Lost = Initial Weight – Current Weight
  2. Calculate Percentage of Weight Lost: Next, divide the Total Weight Lost by the Initial Weight. This gives you the proportion of the original body weight that has been lost.
    Formula: Proportion Lost = Total Weight Lost / Initial Weight
  3. Convert to Percentage: Finally, multiply the proportion by 100 to express the result as a percentage. This is the key metric the calculator provides.
    Formula: Weight Loss Percentage = (Total Weight Lost / Initial Weight) * 100

Essentially, the formula answers the question: "What percentage of my original body weight have I successfully managed to lose?" This is a fundamental calculation for anyone using a weight loss percentage calculator or a similar weight loss tracking spreadsheet.

Variable Explanations

  • Initial Weight: The weight recorded at the beginning of a weight loss program or tracking period.
  • Current Weight: The most recent weight measurement.
  • Total Weight Lost: The absolute difference between the initial and current weights.
  • Weight Loss Percentage: The percentage of the initial weight that has been lost.

Variables Table

Variable Meaning Unit Typical Range
Initial Weight Starting body weight kg or lbs Highly variable (e.g., 50-250+ kg/lbs)
Current Weight Current body weight kg or lbs Must be less than or equal to Initial Weight
Total Weight Lost Absolute difference in weight kg or lbs 0 to Initial Weight
Weight Loss Percentage Proportion of initial weight lost % 0% to 100% (theoretically)

Practical Examples (Real-World Use Cases)

Understanding the weight loss percentage formula through practical examples clarifies its application and significance in fitness journeys. These examples demonstrate how this calculator functions, similar to using a dedicated weight loss percentage calculator excel template.

Example 1: Moderate Weight Loss Goal

Scenario: Sarah wants to lose 15% of her body weight to improve her energy levels and overall health. She starts her journey at 160 pounds.

  • Inputs:
    • Initial Weight: 160 lbs
    • Current Weight: 150 lbs
  • Calculations:
    • Total Weight Lost = 160 lbs – 150 lbs = 10 lbs
    • Weight Loss Percentage = (10 lbs / 160 lbs) * 100 = 6.25%
  • Interpretation: Sarah has lost 10 pounds, which represents 6.25% of her initial body weight. While she has made progress towards her 15% goal, she still has a way to go. This percentage provides a clear benchmark of her achievement relative to her starting point. This is a common metric tracked using body weight tracking sheets.

Example 2: Significant Weight Loss Achievement

Scenario: John has been working on his health for several months and wants to see how far he's come. He began at 220 kilograms and now weighs 190 kilograms.

  • Inputs:
    • Initial Weight: 220 kg
    • Current Weight: 190 kg
  • Calculations:
    • Total Weight Lost = 220 kg – 190 kg = 30 kg
    • Weight Loss Percentage = (30 kg / 220 kg) * 100 = 13.64%
  • Interpretation: John has successfully lost 30 kilograms, which is approximately 13.64% of his starting weight. This significant percentage demonstrates a substantial commitment to his health goals and highlights the effectiveness of his program. Tracking such achievements often leads users to look for healthy weight loss plan templates.

How to Use This Weight Loss Percentage Calculator

Our Weight Loss Percentage Calculator is designed for simplicity and accuracy, mirroring the ease of use expected from a professional weight loss percentage calculator excel template. Follow these steps to get precise insights into your progress.

Step-by-Step Instructions

  1. Enter Initial Weight: In the "Initial Weight" field, input the weight you were at when you started your weight loss journey or the beginning of your tracking period. Ensure you use consistent units (e.g., kilograms or pounds) throughout.
  2. Enter Current Weight: In the "Current Weight" field, input your most recent weight measurement. This should be in the same unit as your initial weight.
  3. Calculate: Click the "Calculate" button. The calculator will instantly process your inputs.

How to Read Results

  • Primary Result (Highlighted): This large, prominent number shows your Weight Loss Percentage. It represents the proportion of your initial weight that you have lost, expressed as a percentage. A higher percentage indicates greater relative weight loss.
  • Total Weight Lost: This value shows the absolute amount of weight you have lost (e.g., 10 lbs or 5 kg).
  • Percentage Lost: This is a reiteration of the primary highlighted result for clarity.
  • Remaining to Goal: If you have a specific target weight or percentage in mind, this field (which requires additional inputs not present in this basic calculator) would show how much more you need to lose. In this calculator's current iteration, it will display '–' unless further goal-setting features are added.
  • Intermediate Values: The table below the results provides a clear breakdown of each metric.
  • Chart: The dynamic chart visually represents your weight change, offering an intuitive understanding of your trend.

Decision-Making Guidance

  • Celebrate Milestones: Seeing a positive percentage is a great motivator. Use this to celebrate progress, whether it's 1%, 5%, or 10%.
  • Adjust Strategy: If your weight loss has stalled or the percentage is not moving as expected, this tool can prompt you to reassess your diet, exercise, or lifestyle habits. Consult with a healthcare provider or a certified nutritionist for personalized advice on adjusting your weight management strategies.
  • Set Realistic Goals: Understand that healthy weight loss is typically 1-2% of body weight per week. Use the percentage to set achievable targets rather than focusing solely on absolute numbers.
  • Long-Term Perspective: This calculator is useful for ongoing tracking. Periodically checking your percentage helps maintain focus over extended periods, much like using a dedicated weight loss journal template.

Key Factors That Affect Weight Loss Percentage Results

While the calculation for weight loss percentage is straightforward, several external and internal factors can influence the actual weight loss achieved and, consequently, the percentage reported by the calculator. Understanding these nuances is crucial for interpreting results accurately, especially when using a tool akin to a weight loss percentage calculator excel template.

1. Diet and Caloric Deficit

Financial Reasoning: The cost of food and adherence to a healthy eating plan directly impact caloric intake. A sustainable caloric deficit is the cornerstone of weight loss. Spending more on nutritious, whole foods can lead to better satiety and fewer unhealthy, high-calorie impulse purchases. Conversely, relying on cheaper, processed foods can hinder progress despite potentially lower immediate costs.

2. Exercise and Physical Activity

Financial Reasoning: Gym memberships, fitness classes, home workout equipment, or even comfortable athletic wear represent financial investments in physical activity. Regular exercise increases calorie expenditure, helping to create or deepen a caloric deficit. It also builds muscle, which can boost metabolism. The return on investment is improved health and a more efficient weight loss percentage.

3. Metabolism and Basal Metabolic Rate (BMR)

Financial Reasoning: BMR represents the calories your body burns at rest. Factors like age, genetics, muscle mass, and hormones influence BMR. While you can't directly control genetics, building muscle through exercise (an investment) can slightly increase BMR. A higher BMR means more calories burned daily, potentially leading to a faster and more significant weight loss percentage without drastic dietary cuts.

4. Hormonal Balance and Medical Conditions

Financial Reasoning: Certain hormonal imbalances (e.g., thyroid issues, PCOS) or medical conditions can make weight loss more challenging and costly to manage. Treatments or specialized diets prescribed by doctors can incur medical expenses. Ignoring these underlying issues can lead to wasted money on ineffective diet plans and a slower, less satisfactory weight loss percentage.

5. Sleep Quality and Stress Management

Financial Reasoning: Poor sleep and chronic stress can disrupt hormones like cortisol, ghrelin, and leptin, which regulate appetite and fat storage. Investing in good sleep hygiene (e.g., comfortable mattress, blackout curtains) or stress-reducing activities (e.g., meditation apps, yoga) can indirectly support weight loss efforts. The financial cost of chronic stress-related illnesses is far greater than preventative measures.

6. Consistency and Adherence

Financial Reasoning: The long-term financial commitment to a healthy lifestyle (groceries, gym fees) is only effective if maintained. Sporadic efforts yield poor results. Consistency in diet and exercise, even when motivation wanes, is key to achieving and maintaining a desired weight loss percentage. This reinforces the value of structured tools like an Excel template for weight loss to maintain focus.

7. Hydration Levels

Financial Reasoning: Staying adequately hydrated is crucial for metabolism and can help manage appetite. Water is inexpensive, making it a cost-effective strategy. Dehydration can be mistaken for hunger, leading to unnecessary food spending. Ensuring sufficient water intake is a low-cost, high-impact factor for optimizing weight loss results.

8. Muscle vs. Fat Mass

Financial Reasoning: Weight loss percentage can be misleading if not considered alongside body composition. Building muscle while losing fat might result in a smaller overall weight loss percentage, even though health and appearance improve significantly. Investing in strength training is crucial for body recomposition. Relying solely on scale weight and percentage without considering muscle gain can lead to flawed conclusions about progress, similar to how misinterpreting financial statements can lead to poor investment decisions.

Frequently Asked Questions (FAQ)

Here are answers to common questions about using a weight loss percentage calculator and understanding weight loss metrics, relevant whether you're using our tool or a downloadable weight loss percentage calculator excel template.

1. What is considered a "good" weight loss percentage?

Generally, a healthy and sustainable weight loss percentage is considered to be between 5% and 10% of initial body weight over a 4-6 month period. Losing more rapidly can sometimes be unsustainable or unhealthy. The ideal percentage depends on individual health goals and circumstances.

2. Can my weight fluctuate daily, affecting the percentage?

Yes, daily weight fluctuations due to water retention, food intake, and exercise are normal. For more accurate tracking of your weight loss percentage, it's best to weigh yourself under consistent conditions (e.g., same time of day, after using the restroom, before eating) and look at trends over weeks rather than relying on single-day changes.

3. Should I use kilograms or pounds for the calculation?

You can use either unit, but it's crucial to be consistent. Whichever unit you choose for your initial weight, use the exact same unit for your current weight. The percentage calculation works regardless of the unit of mass used.

4. What if my current weight is higher than my initial weight?

If your current weight is higher, the "Total Weight Lost" will be negative, and the "Weight Loss Percentage" will also be negative. This indicates weight gain rather than loss. The calculator will accurately reflect this negative percentage.

5. How does body composition affect the weight loss percentage?

Body composition matters significantly. If you gain muscle while losing fat, your total weight loss might be less dramatic, resulting in a lower weight loss percentage. However, you would still be improving your health and body shape. This calculator primarily focuses on weight, not body fat percentage or lean mass.

6. Can I use this calculator for muscle gain percentage?

This calculator is specifically designed for weight loss percentage. While you could technically input "initial mass" and "current mass" to see a percentage change, it wouldn't account for body composition changes (like gaining muscle and losing fat simultaneously), which is what a muscle gain percentage calculation would focus on.

7. How often should I update my current weight?

For most people, updating their weight 1-3 times per week provides a good balance between tracking progress and avoiding fixation on daily fluctuations. Some prefer to update it daily. The key is consistency in weighing conditions.

8. Is a 20% weight loss percentage achievable and healthy?

Achieving a 20% weight loss percentage is a significant accomplishment and can lead to substantial health benefits, especially for individuals classified as obese. However, the timeline and sustainability are critical. Rapid loss of 20% might not be healthy or sustainable. A gradual, consistent approach is generally recommended. Always consult with a healthcare provider before embarking on a significant weight loss journey.

9. How does this calculator compare to an Excel template?

This calculator provides the same core functionality as a well-designed weight loss percentage calculator excel template. It offers instant results, real-time updates, and a visual chart, eliminating the need for spreadsheet software for basic calculations. Advanced Excel templates might offer more customization, historical data logging, or integration with other financial or health tracking spreadsheets.

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var initialWeightInput = document.getElementById('initialWeight'); var currentWeightInput = document.getElementById('currentWeight'); var weightLostSpan = document.getElementById('weightLost'); var percentageLostSpan = document.getElementById('percentageLost'); var remainingToGoalSpan = document.getElementById('remainingToGoal'); var primaryResultSpan = document.getElementById('primaryResult'); var tableInitialWeight = document.getElementById('tableInitialWeight'); var tableCurrentWeight = document.getElementById('tableCurrentWeight'); var tableWeightLost = document.getElementById('tableWeightLost'); var tablePercentageLost = document.getElementById('tablePercentageLost'); var chart; var chartData = { labels: ['Start', 'Current'], datasets: [{ label: 'Weight (kg/lbs)', data: [null, null], borderColor: 'var(–primary-color)', backgroundColor: 'rgba(0, 74, 153, 0.5)', fill: false, tension: 0.1, pointRadius: 6, pointHoverRadius: 8 }] }; function initializeChart() { var ctx = document.getElementById('weightLossChart').getContext('2d'); chart = new Chart(ctx, { type: 'line', data: chartData, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: false, title: { display: true, text: 'Weight (kg/lbs)' } }, x: { title: { display: true, text: 'Stage' } } }, plugins: { legend: { display: false // Hide legend as we only have one relevant dataset }, tooltip: { callbacks: { label: function(tooltipItem) { return tooltipItem.dataset.label + ': ' + tooltipItem.raw + ' kg/lbs'; } } } } } }); } function updateChart(initialWeight, currentWeight) { if (!chart) { initializeChart(); } chart.data.datasets[0].data = [initialWeight, currentWeight]; chart.data.labels = ['Initial Weight', 'Current Weight']; // Update labels for clarity // Adjust y-axis if necessary to ensure both points are visible var minVal = Math.min(initialWeight || Infinity, currentWeight || Infinity); var maxVal = Math.max(initialWeight || -Infinity, currentWeight || -Infinity); if (isFinite(minVal) && isFinite(maxVal)) { var range = maxVal – minVal; var buffer = range * 0.1; // 10% buffer top and bottom // Ensure buffer is reasonable, especially if range is small if (buffer < 5) buffer = 5; chart.options.scales.y.min = Math.max(0, minVal – buffer); chart.options.scales.y.max = maxVal + buffer; } else { // Reset to default if no valid data chart.options.scales.y.min = undefined; chart.options.scales.y.max = undefined; } chart.update(); } function calculateWeightLoss() { var initialWeight = parseFloat(initialWeightInput.value); var currentWeight = parseFloat(currentWeightInput.value); var errors = false; // Clear previous errors and results document.getElementById('initialWeightError').textContent = ''; document.getElementById('currentWeightError').textContent = ''; document.getElementById('initialWeightError').classList.remove('visible'); document.getElementById('currentWeightError').classList.remove('visible'); // Input validation if (isNaN(initialWeight) || initialWeight <= 0) { document.getElementById('initialWeightError').textContent = 'Please enter a valid positive number for initial weight.'; document.getElementById('initialWeightError').classList.add('visible'); errors = true; } if (isNaN(currentWeight) || currentWeight initialWeight) { document.getElementById('currentWeightError').textContent = 'Current weight should be less than or equal to initial weight for loss calculation.'; document.getElementById('currentWeightError').classList.add('visible'); errors = true; } if (errors) { weightLostSpan.textContent = '–'; percentageLostSpan.textContent = '–'; remainingToGoalSpan.textContent = '–'; primaryResultSpan.textContent = '–'; tableInitialWeight.textContent = '–'; tableCurrentWeight.textContent = '–'; tableWeightLost.textContent = '–'; tablePercentageLost.textContent = '–'; updateChart(null, null); // Clear chart return; } var weightLost = initialWeight – currentWeight; var percentageLost = (weightLost / initialWeight) * 100; // Update results display weightLostSpan.textContent = weightLost.toFixed(2); percentageLostSpan.textContent = percentageLost.toFixed(2) + '%'; primaryResultSpan.textContent = percentageLost.toFixed(2) + '%'; // Update table tableInitialWeight.textContent = initialWeight.toFixed(2); tableCurrentWeight.textContent = currentWeight.toFixed(2); tableWeightLost.textContent = weightLost.toFixed(2); tablePercentageLost.textContent = percentageLost.toFixed(2); // Update chart updateChart(initialWeight, currentWeight); } function resetCalculator() { initialWeightInput.value = "; currentWeightInput.value = "; weightLostSpan.textContent = '–'; percentageLostSpan.textContent = '–'; remainingToGoalSpan.textContent = '–'; primaryResultSpan.textContent = '–'; tableInitialWeight.textContent = '–'; tableCurrentWeight.textContent = '–'; tableWeightLost.textContent = '–'; tablePercentageLost.textContent = '–'; // Clear errors document.getElementById('initialWeightError').textContent = "; document.getElementById('currentWeightError').textContent = "; document.getElementById('initialWeightError').classList.remove('visible'); document.getElementById('currentWeightError').classList.remove('visible'); // Update chart to empty state if (chart) { updateChart(null, null); } } function copyResults() { var initialWeight = initialWeightInput.value; var currentWeight = currentWeightInput.value; var weightLost = weightLostSpan.textContent; var percentageLost = percentageLostSpan.textContent; var primaryResult = primaryResultSpan.textContent; var resultsText = "— Weight Loss Calculation Results —\n\n"; resultsText += "Initial Weight: " + (initialWeight || 'N/A') + " kg/lbs\n"; resultsText += "Current Weight: " + (currentWeight || 'N/A') + " kg/lbs\n"; resultsText += "———————————–\n"; resultsText += "Total Weight Lost: " + weightLost + "\n"; resultsText += "Weight Loss Percentage: " + percentageLost + "\n"; resultsText += "Primary Result: " + primaryResult + "\n"; resultsText += "\n— Key Assumptions —\n"; resultsText += "Calculation based on: ((Initial Weight – Current Weight) / Initial Weight) * 100\n"; resultsText += "Units are consistent (kg or lbs).\n"; // Use a temporary textarea to copy to clipboard var textArea = document.createElement("textarea"); textArea.value = resultsText; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; textArea.style.top = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied to clipboard!' : 'Copying failed!'; // Optional: Display a temporary notification to the user // alert(msg); // Using alert might be disruptive, consider a toast notification if possible in a real app } catch (err) { // Handle error case // alert('Copying failed!'); } finally { document.body.removeChild(textArea); } } // Initialize chart on page load window.onload = function() { initializeChart(); // Optionally, pre-fill with default or last used values if stored // For this example, we leave them blank until user input };

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