Where to Buy a Weight Watchers Points Plus Calculator

Weight Watchers Points Plus Calculator: Where to Buy & How to Use body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; background-color: #f8f9fa; margin: 0; padding: 0; } .container { max-width: 1000px; margin: 20px auto; padding: 20px; background-color: #ffffff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); } header { background-color: #004a99; color: #ffffff; padding: 20px 0; text-align: center; border-radius: 8px 8px 0 0; margin-bottom: 20px; } header h1 { margin: 0; font-size: 2.5em; } .calculator-section { margin-bottom: 40px; padding: 25px; border: 1px solid #e0e0e0; border-radius: 8px; background-color: #fdfdfd; } .calculator-section h2 { text-align: center; color: #004a99; margin-top: 0; margin-bottom: 25px; } .loan-calc-container { display: flex; flex-direction: column; gap: 15px; } .input-group { display: flex; flex-direction: column; gap: 5px; } .input-group label { font-weight: bold; color: #004a99; } .input-group input[type="number"], .input-group select { padding: 10px; border: 1px solid #ccc; border-radius: 5px; font-size: 1em; width: calc(100% – 22px); /* Adjust for padding */ } .input-group input[type="number"]:focus, .input-group select:focus { border-color: #004a99; outline: none; box-shadow: 0 0 5px rgba(0, 74, 153, 0.3); } .input-group .helper-text { font-size: 0.85em; color: #666; } .input-group .error-message { color: #dc3545; font-size: 0.8em; margin-top: 5px; display: none; /* Hidden by default */ } .button-group { display: flex; gap: 10px; margin-top: 20px; justify-content: center; flex-wrap: wrap; } button { padding: 12px 25px; border: none; border-radius: 5px; cursor: pointer; font-size: 1em; font-weight: bold; transition: background-color 0.3s ease; } .btn-primary { background-color: #004a99; color: #ffffff; } .btn-primary:hover { background-color: #003a7a; } .btn-secondary { background-color: #6c757d; color: #ffffff; } .btn-secondary:hover { background-color: #5a6268; } .btn-success { background-color: #28a745; color: #ffffff; } .btn-success:hover { background-color: #218838; } #result { background-color: #e0f7fa; color: #004a99; padding: 20px; border-radius: 8px; margin-top: 25px; text-align: center; font-size: 1.2em; font-weight: bold; box-shadow: inset 0 1px 5px rgba(0, 74, 153, 0.1); } #result .main-result { font-size: 2em; color: #004a99; margin-bottom: 15px; display: block; } #result .intermediate-values { font-size: 0.9em; color: #333; margin-top: 15px; display: flex; justify-content: space-around; flex-wrap: wrap; } #result .intermediate-values span { margin: 5px 10px; } #result .formula-explanation { font-size: 0.8em; color: #555; margin-top: 20px; border-top: 1px dashed #ccc; padding-top: 15px; } .chart-container { margin-top: 30px; padding: 20px; border: 1px solid #e0e0e0; border-radius: 8px; background-color: #fdfdfd; text-align: center; } .chart-container h3 { color: #004a99; margin-bottom: 20px; } canvas { max-width: 100%; height: auto; } .table-container { margin-top: 30px; overflow-x: auto; } table { width: 100%; border-collapse: collapse; margin-bottom: 20px; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 5px rgba(0,0,0,0.1); } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #ddd; } thead th { background-color: #004a99; color: #ffffff; font-weight: bold; } tbody tr:nth-child(even) { background-color: #f2f2f2; } tbody tr:hover { background-color: #e0e0e0; } caption { font-size: 1.1em; font-weight: bold; color: #004a99; margin-bottom: 15px; caption-side: top; text-align: left; } .article-section { margin-top: 40px; padding: 25px; border: 1px solid #e0e0e0; border-radius: 8px; background-color: #fdfdfd; } .article-section h2, .article-section h3 { color: #004a99; margin-bottom: 15px; } .article-section h2 { text-align: center; margin-top: 0; } .article-section p { margin-bottom: 15px; } .article-section ul, .article-section ol { margin-left: 20px; margin-bottom: 15px; } .article-section li { margin-bottom: 8px; } .faq-item { margin-bottom: 15px; padding: 10px; border-left: 3px solid #004a99; background-color: #f0f8ff; border-radius: 4px; } .faq-item strong { color: #004a99; } .internal-links { margin-top: 30px; padding: 20px; border: 1px solid #e0e0e0; border-radius: 8px; background-color: #fdfdfd; } .internal-links h3 { color: #004a99; text-align: center; margin-top: 0; margin-bottom: 20px; } .internal-links ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 10px; } .internal-links li { border-bottom: 1px dashed #ccc; padding-bottom: 10px; } .internal-links li:last-child { border-bottom: none; } .internal-links a { color: #004a99; text-decoration: none; font-weight: bold; } .internal-links a:hover { text-decoration: underline; } .internal-links p { font-size: 0.9em; color: #555; margin-top: 5px; } .highlight { background-color: #28a745; color: white; padding: 3px 6px; border-radius: 3px; font-weight: bold; } .sub-highlight { background-color: #ffc107; color: #333; padding: 2px 5px; border-radius: 3px; font-weight: bold; }

Weight Watchers Points Plus Calculator

Your Guide to Smart Food Choices

Weight Watchers Points Plus Calculator

Enter the name of the food you want to calculate points for.
Enter the quantity of the food item (e.g., 1, 0.5, 2.5).
Piece Cup Ounce (oz) Gram (g) Tablespoon (tbsp) Teaspoon (tsp) Slice Serving Select the unit of measurement for the serving size.
Enter the calorie count for one standard serving unit (e.g., 95 for one apple).
Enter the grams of fat for one standard serving unit (e.g., 0.3g for one apple).
Enter the grams of carbohydrates for one standard serving unit (e.g., 25g for one apple).
Enter the grams of fiber for one standard serving unit (e.g., 4.4g for one apple).
Enter the grams of sugar for one standard serving unit (e.g., 19g for one apple).
Total Calories: Total Fat: Total Carbs: Total Fiber: Total Sugar:
Points Plus = (Fat grams * 3) + (Carbs grams * 1) + (Fiber grams * -1) + (Sugar grams * -1) + (Calories / 50)
*Note: This is a simplified representation. Actual WW Points Plus calculations may vary slightly based on specific program updates and rounding.*

Points Breakdown Over Time

Visualizing how points accumulate with increased servings.

Points Plus Calculation Breakdown
Component Value per Serving Unit Total Value Points Contribution
Fat (g)
Carbohydrates (g)
Fiber (g)
Sugar (g)
Calories
Total Points Plus

What is a Weight Watchers Points Plus Calculator?

A Weight Watchers Points Plus calculator is a tool designed to help individuals estimate the "Points Plus" value of various foods. This system was a popular method used by Weight Watchers (now WW) to simplify healthy eating by assigning a numerical value to foods based on their nutritional content, primarily focusing on calories, fat, carbohydrates, and fiber. The goal was to encourage members to choose foods that were more filling and nutrient-dense, thereby promoting weight loss and healthier habits. While WW has evolved its program over the years (moving to systems like SmartPoints and myWW), the Points Plus system remains a reference point for many, and understanding how it worked can still be beneficial for those familiar with it or seeking to understand historical tracking methods.

Who should use it?

  • Individuals who are familiar with or currently following the WW Points Plus program.
  • People looking to understand the nutritional trade-offs of different foods based on a points system.
  • Those who want a quick estimate of food values without needing to manually calculate them.
  • Individuals who may have access to older WW materials or are comparing different WW program methodologies.

Common Misconceptions:

  • It's the current WW system: The Points Plus system is an older program. WW has since updated its points system multiple times.
  • It's a perfect measure of health: While it encourages healthier choices, it's a simplified system and doesn't account for all aspects of nutrition or individual dietary needs.
  • All foods are equal: The calculator provides an estimate; actual points can vary slightly based on specific ingredients, preparation methods, and WW's proprietary algorithms.

Points Plus Formula and Mathematical Explanation

The Points Plus system aimed to provide a more satisfying eating experience by giving "bonus" points for healthier ingredients like fiber and protein (though protein wasn't directly in the Points Plus formula, fiber was a key factor). The core formula for calculating Points Plus values is as follows:

Points Plus = (Fat grams * 3) + (Carbs grams * 1) + (Fiber grams * -1) + (Sugar grams * -1) + (Calories / 50)

Let's break down the variables and their contribution:

Points Plus Variables and Their Impact
Variable Meaning Unit Typical Range (per serving unit) Impact on Points
Fat grams Total grams of fat in the food item. grams (g) 0 – 50+ Positive (each gram adds 3 points)
Carbs grams Total grams of carbohydrates in the food item. grams (g) 0 – 100+ Positive (each gram adds 1 point)
Fiber grams Total grams of dietary fiber in the food item. grams (g) 0 – 20+ Negative (each gram subtracts 1 point)
Sugar grams Total grams of sugar in the food item. grams (g) 0 – 100+ Negative (each gram subtracts 1 point)
Calories Total energy content of the food item. kcal 0 – 1000+ Positive (every 50 kcal adds 1 point)
Serving Size The quantity of the food item being considered. Varies (piece, cup, oz, g, etc.) 1 – Many Multiplier for total points

The formula essentially assigns higher point values to foods high in fat and carbohydrates, while giving "discounts" for fiber and sugar. The calorie component acts as a general buffer. The final calculated points are then multiplied by the serving size to get the total points for the amount consumed. This approach was designed to make filling, high-fiber foods seem more "affordable" in terms of points.

Practical Examples (Real-World Use Cases)

Let's explore how the Weight Watchers Points Plus calculator can be used with practical examples:

Example 1: A Serving of Oatmeal

Scenario: You're having a standard bowl of oatmeal for breakfast.

Inputs:

  • Food Item Name: Oatmeal
  • Serving Size: 1
  • Serving Unit: Cup
  • Calories per Serving Unit: 160
  • Fat (grams) per Serving Unit: 3
  • Carbohydrates (grams) per Serving Unit: 27
  • Fiber (grams) per Serving Unit: 4
  • Sugar (grams) per Serving Unit: 1

Calculation using the formula:

Points = (3g Fat * 3) + (27g Carbs * 1) + (4g Fiber * -1) + (1g Sugar * -1) + (160 Calories / 50)

Points = 9 + 27 – 4 – 1 + 3.2

Points = 34.2

Result: Approximately 34 Points Plus for 1 cup of oatmeal. This seems high, highlighting that while oatmeal has fiber, its carb and calorie content contribute significantly. Adding milk or sugar would increase this further.

Example 2: A Small Banana

Scenario: You need a quick, portable snack.

Inputs:

  • Food Item Name: Banana
  • Serving Size: 1
  • Serving Unit: Piece
  • Calories per Serving Unit: 105
  • Fat (grams) per Serving Unit: 0.4
  • Carbohydrates (grams) per Serving Unit: 27
  • Fiber (grams) per Serving Unit: 3.1
  • Sugar (grams) per Serving Unit: 14

Calculation using the formula:

Points = (0.4g Fat * 3) + (27g Carbs * 1) + (3.1g Fiber * -1) + (14g Sugar * -1) + (105 Calories / 50)

Points = 1.2 + 27 – 3.1 – 14 + 2.1

Points = 13.2

Result: Approximately 13 Points Plus for one small banana. This demonstrates how fruits, despite their natural sugars, can be relatively point-friendly due to their fiber content and overall nutritional profile compared to processed snacks.

How to Use This Weight Watchers Points Plus Calculator

Using this calculator is straightforward. Follow these steps to get your Points Plus values quickly:

  1. Enter Food Details: In the "Food Item Name" field, type the name of the food you are analyzing.
  2. Specify Serving Size: Input the quantity of the food you plan to consume in the "Serving Size" field.
  3. Select Serving Unit: Choose the appropriate unit of measurement (e.g., cup, oz, gram, piece) from the dropdown menu.
  4. Input Nutritional Information: Accurately enter the values for Calories, Fat (grams), Carbohydrates (grams), Fiber (grams), and Sugar (grams) *per standard serving unit*. This is crucial for accurate calculation. You can often find this information on the food's packaging or through online nutritional databases.
  5. Calculate: Click the "Calculate Points" button.

How to Read Results:

  • The main highlighted result shows the total Points Plus value for the specified serving size.
  • The intermediate values provide a breakdown of total calories, fat, carbs, fiber, and sugar for your portion.
  • The table offers a detailed view of each component's contribution to the final points.
  • The chart visually represents how points might change with increasing servings.

Decision-Making Guidance:

Use the calculated points to make informed choices. If a food has a high point value relative to its satiety or nutritional benefit, consider alternatives. Conversely, foods with lower point values that are filling and nutritious are excellent choices. This calculator helps you align your food choices with your daily points budget, supporting your weight management goals.

Key Factors That Affect Weight Watchers Points Plus Results

Several factors can influence the Points Plus value of a food and the accuracy of the calculation:

  1. Nutritional Data Accuracy: The most significant factor is the precision of the input nutritional data (calories, fat, carbs, fiber, sugar). Inaccurate data, whether from packaging errors, database discrepancies, or estimation, will lead to incorrect point calculations. Always strive for the most reliable sources.
  2. Serving Size Definition: The "serving unit" definition is critical. A "cup" of something can vary greatly in weight and density. Similarly, "piece" can differ (e.g., a small apple vs. a large one). Using standardized measurements or weights (like grams or ounces) often yields more consistent results.
  3. Ingredient Variations: Even within the same food type (e.g., bread), different brands use different ingredients. One bread might have more fiber or less sugar than another, leading to different Points Plus values. Always check the specific product's nutrition label.
  4. Preparation Methods: How food is prepared can drastically alter its nutritional profile. Frying adds fat, boiling might leach nutrients, and adding sauces or toppings introduces additional calories, fats, and sugars, all of which impact the final points.
  5. Program Updates and Algorithm Changes: WW has updated its points system over time. The Points Plus formula is specific to that era. Newer programs (like SmartPoints or myWW) use different formulas and may weigh nutrients differently, leading to different point values for the same food.
  6. Rounding Conventions: Different calculators or WW resources might use slightly different rounding rules for intermediate calculations or the final point value. This can lead to minor discrepancies. Our calculator aims for standard mathematical rounding.
  7. Hidden Ingredients: Processed foods can contain hidden sugars or fats that might not be immediately obvious. Relying solely on basic nutritional labels might miss nuances that affect the true Points Plus value according to WW's internal calculations.

Frequently Asked Questions (FAQ)

Q1: Is the Points Plus system still used by Weight Watchers?
A1: No, Weight Watchers (WW) has evolved its program and now uses systems like myWW (Green, Blue, Purple plans) and previously SmartPoints. The Points Plus system is an older methodology.
Q2: Where can I find the nutritional information for my food?
A2: Look for the Nutrition Facts label on packaged foods. For fresh produce or restaurant meals, you can often find reliable nutritional data on the manufacturer's website, restaurant menus, or reputable online nutritional databases.
Q3: Why does my calculated Points Plus value differ from what I found elsewhere?
A3: Differences can arise from variations in the nutritional data used, different serving size definitions, rounding methods, or if the other source is using a different WW program's point system (e.g., SmartPoints vs. Points Plus).
Q4: Can I use this calculator for the current WW program?
A4: No, this calculator is specifically for the historical Points Plus system. Current WW programs use different formulas and may prioritize different nutrients.
Q5: What does the negative contribution from Fiber and Sugar mean?
A5: In the Points Plus system, fiber and sugar were given negative weighting. This meant that foods higher in fiber (which is satiating and beneficial) or sugar (which contributes to sweetness but can be less filling per gram than fat) effectively had their points reduced. This encouraged choosing foods with more fiber.
Q6: How accurate is the "Calories / 50" part of the formula?
A6: This component acts as a general adjustment based on energy density. It ensures that foods with higher calorie counts, even if low in fat or carbs, still contribute to the points total, reflecting their energy contribution.
Q7: What if a food has zero fat, carbs, fiber, or sugar?
A7: If any of these values are zero, they simply contribute zero to that part of the calculation. For example, zero fat means (0 * 3) = 0 points from fat. The calculator handles zero inputs correctly.
Q8: Can I calculate points for drinks?
A8: Yes, you can use the calculator for drinks, but be mindful of the serving unit (e.g., fluid ounces, cups) and the nutritional content, especially added sugars and fats in creamy or sweetened beverages. Plain water, tea, and black coffee typically have 0 points.

© 2023 Your Website Name. All rights reserved.

var chartInstance = null; // Global variable to hold chart instance function validateInput(id, min, max) { var input = document.getElementById(id); var errorElement = document.getElementById(id + "Error"); var value = parseFloat(input.value); errorElement.style.display = 'none'; // Hide error by default if (input.value === "") { errorElement.textContent = "This field cannot be empty."; errorElement.style.display = 'block'; return false; } if (isNaN(value)) { errorElement.textContent = "Please enter a valid number."; errorElement.style.display = 'block'; return false; } if (min !== undefined && value max) { errorElement.textContent = "Value cannot be greater than " + max + "."; errorElement.style.display = 'block'; return false; } return true; } function calculatePoints() { // Clear previous errors document.getElementById("foodNameError").style.display = 'none'; document.getElementById("servingSizeError").style.display = 'none'; document.getElementById("servingUnitError").style.display = 'none'; document.getElementById("caloriesPerUnitError").style.display = 'none'; document.getElementById("fatGramsPerUnitError").style.display = 'none'; document.getElementById("carbsGramsPerUnitError").style.display = 'none'; document.getElementById("fiberGramsPerUnitError").style.display = 'none'; document.getElementById("sugarGramsPerUnitError").style.display = 'none'; // Validate inputs var isValid = true; isValid = validateInput("servingSize", 0) && isValid; isValid = validateInput("caloriesPerUnit", 0) && isValid; isValid = validateInput("fatGramsPerUnit", 0) && isValid; isValid = validateInput("carbsGramsPerUnit", 0) && isValid; isValid = validateInput("fiberGramsPerUnit", 0) && isValid; isValid = validateInput("sugarGramsPerUnit", 0) && isValid; if (!isValid) { return; // Stop calculation if any input is invalid } var servingSize = parseFloat(document.getElementById("servingSize").value); var caloriesPerUnit = parseFloat(document.getElementById("caloriesPerUnit").value); var fatGramsPerUnit = parseFloat(document.getElementById("fatGramsPerUnit").value); var carbsGramsPerUnit = parseFloat(document.getElementById("carbsGramsPerUnit").value); var fiberGramsPerUnit = parseFloat(document.getElementById("fiberGramsPerUnit").value); var sugarGramsPerUnit = parseFloat(document.getElementById("sugarGramsPerUnit").value); // Calculate intermediate values var totalCalories = caloriesPerUnit * servingSize; var totalFat = fatGramsPerUnit * servingSize; var totalCarbs = carbsGramsPerUnit * servingSize; var totalFiber = fiberGramsPerUnit * servingSize; var totalSugar = sugarGramsPerUnit * servingSize; // Calculate points contribution for each component var fatPoints = fatGramsPerUnit * 3; var carbsPoints = carbsGramsPerUnit * 1; var fiberPoints = fiberGramsPerUnit * -1; var sugarPoints = sugarGramsPerUnit * -1; var caloriesPoints = caloriesPerUnit / 50; // Calculate total Points Plus var totalPoints = fatPoints + carbsPoints + fiberPoints + sugarPoints + caloriesPoints; // Apply serving size multiplier to the final points var finalPoints = totalPoints * servingSize; // Round to one decimal place for display finalPoints = Math.round(finalPoints * 10) / 10; totalCalories = Math.round(totalCalories * 10) / 10; totalFat = Math.round(totalFat * 10) / 10; totalCarbs = Math.round(totalCarbs * 10) / 10; totalFiber = Math.round(totalFiber * 10) / 10; totalSugar = Math.round(totalSugar * 10) / 10; // Update results display document.querySelector("#result .main-result").textContent = finalPoints + " Points Plus"; document.getElementById("totalCalories").textContent = totalCalories; document.getElementById("totalFat").textContent = totalFat + "g"; document.getElementById("totalCarbs").textContent = totalCarbs + "g"; document.getElementById("totalFiber").textContent = totalFiber + "g"; document.getElementById("totalSugar").textContent = totalSugar + "g"; // Update table document.getElementById("fatPerUnitTable").textContent = fatGramsPerUnit.toFixed(1); document.getElementById("carbsPerUnitTable").textContent = carbsGramsPerUnit.toFixed(1); document.getElementById("fiberPerUnitTable").textContent = fiberGramsPerUnit.toFixed(1); document.getElementById("sugarPerUnitTable").textContent = sugarGramsPerUnit.toFixed(1); document.getElementById("caloriesPerUnitTable").textContent = caloriesPerUnit.toFixed(0); document.getElementById("totalFatTable").textContent = totalFat.toFixed(1) + "g"; document.getElementById("totalCarbsTable").textContent = totalCarbs.toFixed(1) + "g"; document.getElementById("totalFiberTable").textContent = totalFiber.toFixed(1) + "g"; document.getElementById("totalSugarTable").textContent = totalSugar.toFixed(1) + "g"; document.getElementById("totalCaloriesTable").textContent = totalCalories.toFixed(0); document.getElementById("fatPointsTable").textContent = (fatPoints * servingSize).toFixed(1); document.getElementById("carbsPointsTable").textContent = (carbsPoints * servingSize).toFixed(1); document.getElementById("fiberPointsTable").textContent = (fiberPoints * servingSize).toFixed(1); document.getElementById("sugarPointsTable").textContent = (sugarPoints * servingSize).toFixed(1); document.getElementById("caloriesPointsTable").textContent = (caloriesPoints * servingSize).toFixed(1); document.getElementById("finalPointsTable").textContent = finalPoints.toFixed(1); updateChart(servingSize); } function resetCalculator() { document.getElementById("foodName").value = "Apple"; document.getElementById("servingSize").value = "1"; document.getElementById("servingUnit").value = "piece"; document.getElementById("caloriesPerUnit").value = "95"; document.getElementById("fatGramsPerUnit").value = "0.3"; document.getElementById("carbsGramsPerUnit").value = "25"; document.getElementById("fiberGramsPerUnit").value = "4.4"; document.getElementById("sugarGramsPerUnit").value = "19"; // Reset results display document.querySelector("#result .main-result").textContent = "–"; document.getElementById("totalCalories").textContent = "–"; document.getElementById("totalFat").textContent = "–"; document.getElementById("totalCarbs").textContent = "–"; document.getElementById("totalFiber").textContent = "–"; document.getElementById("totalSugar").textContent = "–"; // Reset table var tableRows = document.querySelectorAll("#pointsTableBody tr:not(:last-child) td"); for (var i = 0; i < tableRows.length; i++) { tableRows[i].textContent = "–"; } document.getElementById("finalPointsTable").textContent = "–"; // Clear chart if (chartInstance) { chartInstance.destroy(); chartInstance = null; } var canvas = document.getElementById("pointsChart"); var ctx = canvas.getContext("2d"); ctx.clearRect(0, 0, canvas.width, canvas.height); } function copyResults() { var mainResult = document.querySelector("#result .main-result").textContent; var intermediateValues = document.querySelectorAll("#result .intermediate-values span"); var formula = document.querySelector("#result .formula-explanation").textContent.replace("Note: This is a simplified representation. Actual WW Points Plus calculations may vary slightly based on specific program updates and rounding.", "").trim(); var assumptions = "Key Assumptions:\n"; var inputs = [ "Food Item Name: " + document.getElementById("foodName").value, "Serving Size: " + document.getElementById("servingSize").value, "Serving Unit: " + document.getElementById("servingUnit").value, "Calories per Unit: " + document.getElementById("caloriesPerUnit").value, "Fat (g) per Unit: " + document.getElementById("fatGramsPerUnit").value, "Carbs (g) per Unit: " + document.getElementById("carbsGramsPerUnit").value, "Fiber (g) per Unit: " + document.getElementById("fiberGramsPerUnit").value, "Sugar (g) per Unit: " + document.getElementById("sugarGramsPerUnit").value ]; assumptions += inputs.join("\n"); var resultText = "Calculation Results:\n"; resultText += mainResult + "\n\n"; intermediateValues.forEach(function(span) { resultText += span.textContent + "\n"; }); resultText += "\nFormula Used:\n" + formula + "\n\n" + assumptions; // Use a temporary textarea to copy text var textArea = document.createElement("textarea"); textArea.value = resultText; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied!' : 'Copying failed!'; alert(msg); } catch (err) { alert('Oops, unable to copy'); } document.body.removeChild(textArea); } function updateChart(currentServingSize) { var canvas = document.getElementById("pointsChart"); var ctx = canvas.getContext("2d"); // Clear previous chart if it exists if (chartInstance) { chartInstance.destroy(); } var maxServings = 5; // Show up to 5 servings on the chart var labels = []; var pointsData = []; var caloriesData = []; var caloriesPerUnit = parseFloat(document.getElementById("caloriesPerUnit").value) || 0; var fatGramsPerUnit = parseFloat(document.getElementById("fatGramsPerUnit").value) || 0; var carbsGramsPerUnit = parseFloat(document.getElementById("carbsGramsPerUnit").value) || 0; var fiberGramsPerUnit = parseFloat(document.getElementById("fiberGramsPerUnit").value) || 0; var sugarGramsPerUnit = parseFloat(document.getElementById("sugarGramsPerUnit").value) || 0; for (var i = 1; i <= maxServings; i++) { var serving = i * (currentServingSize / currentServingSize); // Normalize to 1 unit if currentServingSize is not 1 labels.push(i + "x " + document.getElementById("servingUnit").value); var currentFatPoints = fatGramsPerUnit * 3; var currentCarbsPoints = carbsGramsPerUnit * 1; var currentFiberPoints = fiberGramsPerUnit * -1; var currentSugarPoints = sugarGramsPerUnit * -1; var currentCaloriesPoints = caloriesPerUnit / 50; var totalPointsForServing = (currentFatPoints + currentCarbsPoints + currentFiberPoints + currentSugarPoints + currentCaloriesPoints) * i; pointsData.push(Math.round(totalPointsForServing * 10) / 10); var totalCaloriesForServing = caloriesPerUnit * i; caloriesData.push(Math.round(totalCaloriesForServing * 10) / 10); } chartInstance = new Chart(ctx, { type: 'line', data: { labels: labels, datasets: [{ label: 'Points Plus', data: pointsData, borderColor: '#004a99', backgroundColor: 'rgba(0, 74, 153, 0.1)', fill: true, tension: 0.1 }, { label: 'Calories', data: caloriesData, borderColor: '#28a745', backgroundColor: 'rgba(40, 167, 69, 0.1)', fill: true, tension: 0.1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Value' } }, x: { title: { display: true, text: 'Servings Multiplier' } } }, plugins: { legend: { position: 'top', }, title: { display: true, text: 'Points Plus vs. Calories Over Servings' } } } }); } // Initial calculation on page load document.addEventListener('DOMContentLoaded', function() { calculatePoints(); });

Leave a Comment