Online Weight Watchers Recipe Calculator

Smart WW Recipe Point Calculator | Calculate Your Points Easily body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f8f9fa; color: #333; line-height: 1.6; margin: 0; padding: 0; } .container { max-width: 960px; margin: 20px auto; padding: 20px; background-color: #fff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); } header { background-color: #004a99; color: #fff; padding: 20px; text-align: center; border-radius: 8px 8px 0 0; margin: -20px -20px 20px -20px; } header h1 { margin: 0; font-size: 2.2em; } h2, h3 { color: #004a99; border-bottom: 2px solid #004a99; padding-bottom: 5px; margin-top: 30px; } .calculator-wrapper { background-color: #e9ecef; padding: 25px; border-radius: 8px; margin-bottom: 30px; } .input-group { margin-bottom: 20px; text-align: left; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: #004a99; } .input-group input[type="number"], .input-group select { width: calc(100% – 22px); padding: 10px; border: 1px solid #ccc; border-radius: 4px; font-size: 1em; } .input-group .helper-text { font-size: 0.85em; color: #6c757d; margin-top: 5px; } .input-group .error-message { color: #dc3545; font-size: 0.85em; margin-top: 5px; display: none; /* Hidden by default */ } .input-group .error-message.visible { display: block; } button { background-color: #004a99; color: white; border: none; padding: 12px 20px; border-radius: 5px; cursor: pointer; font-size: 1em; margin-right: 10px; transition: background-color 0.3s ease; } button:hover { background-color: #003366; } button.secondary { background-color: #6c757d; } button.secondary:hover { background-color: #5a6268; } #results-display { background-color: #28a745; color: white; padding: 20px; border-radius: 8px; text-align: center; margin-top: 25px; box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.2); } #results-display h3 { margin-top: 0; color: white; border-bottom: 1px solid white; } #results-display .main-result { font-size: 2.5em; font-weight: bold; margin: 10px 0; } #results-display .intermediate-values, #results-display .formula-explanation { font-size: 0.95em; margin-top: 15px; padding-top: 10px; border-top: 1px dashed rgba(255, 255, 255, 0.5); } #results-display .intermediate-values p, #results-display .formula-explanation p { margin: 5px 0; } table { width: 100%; border-collapse: collapse; margin-top: 20px; margin-bottom: 30px; } th, td { border: 1px solid #dee2e6; padding: 10px; text-align: left; } th { background-color: #004a99; color: white; } tbody tr:nth-child(even) { background-color: #f2f2f2; } caption { font-size: 1.1em; font-weight: bold; margin-bottom: 10px; color: #004a99; caption-side: top; text-align: left; } #chartContainer { text-align: center; margin-top: 30px; background-color: #f8f9fa; padding: 20px; border-radius: 8px; } #chartContainer canvas { max-width: 100%; height: auto; } .article-content { margin-top: 40px; background-color: #fff; padding: 30px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); } .article-content h2, .article-content h3 { margin-top: 35px; border-bottom-color: #004a99; } .article-content p, .article-content ul, .article-content ol { margin-bottom: 20px; } .article-content li { margin-bottom: 10px; } .article-content a { color: #004a99; text-decoration: none; } .article-content a:hover { text-decoration: underline; } .faq-section .question { font-weight: bold; margin-top: 15px; color: #004a99; } .faq-section .answer { margin-left: 20px; margin-bottom: 15px; } .related-links ul { list-style: none; padding: 0; } .related-links li { margin-bottom: 15px; }

Smart WW Recipe Point Calculator

Effortlessly calculate Weight Watchers points for your homemade meals.

Calculate Your Recipe Points

How many servings does this recipe yield?
Average calories in one serving.
Grams of saturated fat in one serving.
Grams of sugar in one serving.
Milligrams of sodium in one serving.
Grams of protein in one serving.
Grams of dietary fiber in one serving.

Your Recipe's Smart Points

Calories:

Saturated Fat:

Sugar:

Sodium:

Protein:

Fiber:

Formula Used (Simplified): Points are primarily determined by calories, saturated fat, sugar, and sodium, with a reduction for protein and fiber. The exact algorithm is proprietary to WW but this calculator uses a common approximation reflecting these key nutritional components.

Recipe Points Breakdown Table

Nutritional Profile Per Serving
Nutrient Amount Contribution to Points (Approx.)
Calories
Saturated Fat (g)
Sugar (g)
Sodium (mg)
Protein (g)
Fiber (g)

What is an Online Weight Watchers Recipe Calculator?

{primary_keyword} is a digital tool designed to help individuals estimate the "SmartPoints" or "Points" value of homemade recipes according to the Weight Watchers (WW) program guidelines. Unlike pre-packaged WW foods with assigned point values, homemade recipes require calculation based on their nutritional content. This calculator simplifies that process, allowing users to input key nutritional data per serving (like calories, saturated fat, sugar, sodium, protein, and fiber) and receive an estimated point value. This empowers users to make informed choices about the foods they prepare and consume, aligning with their weight management goals within the WW framework.

Who Should Use It:

  • Current WW members who cook at home.
  • Individuals following a WW plan and wanting to track homemade meals accurately.
  • Anyone interested in understanding the nutritional impact of their recipes within a points-based system.
  • Food bloggers or recipe creators who want to provide WW point estimates for their dishes.

Common Misconceptions:

  • "It's an official WW calculator": While based on WW principles, most online calculators are third-party tools and may not use the exact, proprietary WW algorithm. The official WW app or website provides the most accurate calculations.
  • "All points are equal": WW's system evolves. Older systems (like PointsPlus) differ from the current SmartPoints system. Ensure the calculator you use aligns with the current WW program.
  • "Garbage in, garbage out": The accuracy of the calculated points heavily depends on the accuracy of the nutritional information entered. Inaccurate data leads to inaccurate point values.

{primary_keyword} Formula and Mathematical Explanation

The precise formula for calculating Weight Watchers SmartPoints is proprietary and can change. However, it's generally understood to be based on a regression analysis of foods that participants found most satisfying and healthy, factoring in key nutritional components. A common approximation used in many online calculators aims to replicate this by considering the following:

  • Calories: Higher calorie foods generally contribute more points.
  • Saturated Fat: Foods high in saturated fat tend to be assigned more points.
  • Sugar: Added sugars increase the point value.
  • Sodium: Higher sodium content also increases points.
  • Protein: Protein acts as a negative factor, reducing the point value (as it promotes satiety).
  • Fiber: Dietary fiber also reduces the point value, promoting fullness and digestive health.

A simplified representation of the calculation might look something like this (note: this is illustrative and not the exact WW formula):

Points = ( [Calories / 30] + [Saturated Fat (g) * 4] + [Sugar (g) * 4] + [Sodium (mg) / 40] ) – ( [Protein (g) * 1] + [Fiber (g) * 1] )

The result is often rounded up to the nearest whole number. The specific constants (30, 4, 40, 1) are approximations derived from WW's research.

Variables Table

Variables Used in {primary_keyword} Calculation
Variable Meaning Unit Typical Range (Per Serving)
Calories Energy provided by the food. kcal 10 – 1000+
Saturated Fat Type of fat that can raise cholesterol levels. grams (g) 0 – 30+
Sugar Naturally occurring or added sugars. grams (g) 0 – 50+
Sodium Salt content, often linked to water retention. milligrams (mg) 0 – 2000+
Protein Macronutrient essential for muscle and satiety. grams (g) 0 – 100+
Fiber Indigestible carbohydrate aiding digestion and fullness. grams (g) 0 – 15+
Servings Number of portions the recipe is divided into. Count 1 – 20+

Practical Examples (Real-World Use Cases)

Let's illustrate with two common homemade dishes using the online Weight Watchers recipe calculator:

Example 1: Healthy Chicken Stir-Fry

Recipe Details (Per Serving):

  • Servings: 4
  • Calories: 400 kcal
  • Saturated Fat: 4g
  • Sugar: 12g
  • Sodium: 600mg
  • Protein: 30g
  • Fiber: 5g

Calculator Input:

  • Servings: 4
  • Calories Per Serving: 400
  • Saturated Fat Per Serving: 4
  • Sugar Per Serving: 12
  • Sodium Per Serving: 600
  • Protein Per Serving: 30
  • Fiber Per Serving: 5

Estimated Output: ~8 SmartPoints per serving.

Financial Interpretation: This stir-fry is a balanced meal. While it contains moderate calories, fat, sugar, and sodium, the high protein and fiber content help offset the points. Each serving "costs" 8 WW Points, allowing a member to easily track it within their daily or weekly budget. This helps manage overall intake, contributing to weight loss efforts.

Example 2: Creamy Tomato Pasta

Recipe Details (Per Serving):

  • Servings: 6
  • Calories: 550 kcal
  • Saturated Fat: 10g
  • Sugar: 8g
  • Sodium: 850mg
  • Protein: 15g
  • Fiber: 4g

Calculator Input:

  • Servings: 6
  • Calories Per Serving: 550
  • Saturated Fat Per Serving: 10
  • Sugar Per Serving: 8
  • Sodium Per Serving: 850
  • Protein Per Serving: 15
  • Fiber Per Serving: 4

Estimated Output: ~16 SmartPoints per serving.

Financial Interpretation: This pasta dish is significantly higher in points, primarily due to its higher calorie count, substantial saturated fat, and sodium. Each serving represents a larger portion of a daily WW Points budget (16 points). A member might choose to have a smaller portion of this dish or balance it with very low-point meals or snacks throughout the day. This highlights how the calculator provides crucial insights for portion control and meal planning.

How to Use This Online Weight Watchers Recipe Calculator

Using this calculator is straightforward and designed for quick, accurate results. Follow these steps:

  1. Gather Nutritional Information: Before you start, determine the total nutritional content of your entire recipe (not per serving yet). You can find this information using online nutrition databases (like the USDA FoodData Central), product packaging, or by manually calculating based on the ingredients.
  2. Determine Servings: Decide how many equal servings your recipe will yield. Accuracy here is key.
  3. Calculate Per Serving Data: Divide the total nutritional values (total calories, total saturated fat, etc.) for the entire recipe by the number of servings. This gives you the values needed for the calculator inputs.
  4. Input Data into Calculator: Enter the calculated nutritional values for *one serving* into the corresponding fields on the calculator (Calories Per Serving, Saturated Fat Per Serving, etc.). Also, enter the total number of servings the recipe makes.
  5. Click Calculate: Press the "Calculate Points" button.

How to Read Results:

  • Main Result: The large, highlighted number is the estimated SmartPoints value for one serving of your recipe.
  • Intermediate Values: These show the specific nutritional components that contributed to the point calculation (Calories, Saturated Fat, etc.).
  • Nutritional Table: Provides a detailed breakdown of the nutritional content per serving and a rough idea of how each nutrient contributes to the final point score.
  • Chart: Visualizes the proportion of points derived from different nutritional factors.

Decision-Making Guidance:

  • High Points: If a recipe calculates to a high point value, consider modifications: reduce saturated fat (e.g., use leaner meats, less oil), lower sugar content, decrease portion size, or incorporate more high-protein/high-fiber ingredients.
  • Low Points: If the points are lower than expected, verify your nutritional data. Recipes rich in lean protein and fiber will naturally score lower.
  • Tracking: Use the calculated points to log your meal accurately in your WW app or journal. This ensures proper tracking and helps you stay within your points budget.

Key Factors That Affect {primary_keyword} Results

Several factors significantly influence the calculated SmartPoints value of a recipe. Understanding these helps in both using the calculator effectively and in modifying recipes for a lower point count:

  1. Ingredient Quality and Quantity: The most crucial factor. Using fattier cuts of meat, full-fat dairy, added oils, and sugars will drastically increase points compared to lean proteins, non-fat dairy, and natural sweeteners. The *amount* of each ingredient matters proportionally.
  2. Cooking Method: Frying foods often adds significant amounts of fat and calories compared to baking, grilling, steaming, or boiling. The method impacts the final nutritional profile and, consequently, the points.
  3. Portion Size Calculation: If the recipe is divided into fewer servings, the points per serving will be higher, and vice versa. Accurate division is essential for correct tracking. This is why the 'Number of Servings' input is critical.
  4. Added vs. Natural Sugars: While both count towards the sugar metric, recipes relying heavily on added sugars (e.g., syrups, table sugar in sauces) will score higher than those with naturally occurring sugars (e.g., from fruit).
  5. Sodium Content: High-sodium ingredients like processed meats, canned goods (without rinsing), soy sauce, and certain broths can significantly boost the sodium metric, increasing points. Opting for low-sodium versions or using herbs and spices for flavor can help.
  6. Processing Level of Ingredients: Highly processed ingredients often contain more added fats, sugars, sodium, and fewer beneficial nutrients like fiber compared to whole, unprocessed foods. For example, whole-wheat pasta typically has more fiber than white pasta, potentially lowering its points.
  7. Fiber and Protein Balance: As these nutrients reduce points, maximizing them is key for lower-point recipes. Incorporating plenty of vegetables (fiber) and lean protein sources (chicken breast, fish, beans, tofu) is a smart strategy.
  8. Accuracy of Nutritional Data: Relying on generic nutritional estimates or incorrect database entries can lead to misleading point values. Using specific product information or a reliable nutrition tracking tool for ingredient analysis yields the best results.

Frequently Asked Questions (FAQ)

Q1: Is this calculator the official Weight Watchers tool?

No, this is a third-party calculator designed to estimate WW SmartPoints based on common nutritional principles. For the most accurate and official point values, use the WW app or your official WW account resources.

Q2: Why do my recipe points seem high?

Points can be high due to significant amounts of calories, saturated fat, sugar, or sodium. Review your ingredient list and cooking methods. Consider using leaner ingredients, reducing oil/sugar, or increasing fiber/protein.

Q3: How accurate are the points calculated here?

The accuracy depends on the precision of the nutritional data you input. This calculator uses standard formulas that approximate the WW system. Minor variations from the official WW calculation may occur due to their proprietary algorithm.

Q4: Can I use this for older WW programs (e.g., PointsPlus)?

This calculator is designed based on the principles of the current SmartPoints system. Older programs had different formulas and variables. For older programs, you would need a calculator specifically designed for that system.

Q5: What counts as "sugar" in the calculation?

Generally, this refers to all digestible carbohydrates that are sugars, including naturally occurring sugars (like in fruit or dairy) and added sugars (like table sugar, honey, syrup).

Q6: What if my recipe contains zero of a certain nutrient (e.g., zero saturated fat)?

Enter '0' or '0.0' into the corresponding field. The calculator handles zero values correctly and they will not contribute (or will detract, in the case of protein/fiber) to the point total.

Q7: How do I handle ingredients like cooking oil or butter?

You need to account for the amount of oil or butter used *per serving*. For example, if you use 2 tablespoons (approx. 28g) of oil for 4 servings, and 1 tablespoon is about 14g, then each serving gets 14g of fat (mostly unsaturated, but some saturated). Add this to the fat from other ingredients.

Q8: Can I just copy points from online recipes?

It's better to calculate yourself using this tool if possible. Online recipes might have errors, use different serving sizes, or be based on older WW systems. Recalculating ensures you have the most accurate estimate for *your specific preparation*.

Related Tools and Internal Resources

function validateInput(inputId, errorId, minValue = null, maxValue = null) { var input = document.getElementById(inputId); var errorDiv = document.getElementById(errorId); var value = parseFloat(input.value); var isValid = true; errorDiv.innerText = "; errorDiv.classList.remove('visible'); input.style.borderColor = '#ccc'; if (input.value === ") { errorDiv.innerText = 'This field cannot be empty.'; isValid = false; } else if (isNaN(value)) { errorDiv.innerText = 'Please enter a valid number.'; isValid = false; } else { if (minValue !== null && value maxValue) { errorDiv.innerText = 'Value cannot be greater than ' + maxValue + '.'; isValid = false; } } if (!isValid) { input.style.borderColor = '#dc3545'; } return isValid; } function calculateWWPoints() { var isValid = true; isValid &= validateInput('servings', 'servingsError', 1); isValid &= validateInput('caloriesPerServing', 'caloriesPerServingError', 0); isValid &= validateInput('saturatedFatPerServing', 'saturatedFatPerServingError', 0); isValid &= validateInput('sugarPerServing', 'sugarPerServingError', 0); isValid &= validateInput('sodiumPerServing', 'sodiumPerServingError', 0); isValid &= validateInput('proteinPerServing', 'proteinPerServingError', 0); isValid &= validateInput('fiberPerServing', 'fiberPerServingError', 0); if (!isValid) { document.getElementById('results-display').style.display = 'none'; return; } var servings = parseFloat(document.getElementById('servings').value); var calories = parseFloat(document.getElementById('caloriesPerServing').value); var satFat = parseFloat(document.getElementById('saturatedFatPerServing').value); var sugar = parseFloat(document.getElementById('sugarPerServing').value); var sodium = parseFloat(document.getElementById('sodiumPerServing').value); var protein = parseFloat(document.getElementById('proteinPerServing').value); var fiber = parseFloat(document.getElementById('fiberPerServing').value); // Simplified approximation formula based on common understanding // WW formula is proprietary and complex, this is an estimation. var caloriesPoints = calories / 30; var satFatPoints = satFat * 4; var sugarPoints = sugar * 4; var sodiumPoints = sodium / 40; var proteinPoints = protein * 1; // Protein reduces points var fiberPoints = fiber * 1; // Fiber reduces points var totalPointsRaw = caloriesPoints + satFatPoints + sugarPoints + sodiumPoints – proteinPoints – fiberPoints; var finalPoints = Math.ceil(totalPointsRaw); // Ensure points are not negative if (finalPoints < 0) { finalPoints = 0; } document.getElementById('mainResult').innerText = finalPoints; document.getElementById('caloriesResult').innerText = calories.toFixed(1); document.getElementById('satFatResult').innerText = satFat.toFixed(1) + 'g'; document.getElementById('sugarResult').innerText = sugar.toFixed(1) + 'g'; document.getElementById('sodiumResult').innerText = sodium.toFixed(0) + 'mg'; document.getElementById('proteinResult').innerText = protein.toFixed(1) + 'g'; document.getElementById('fiberResult').innerText = fiber.toFixed(1) + 'g'; document.getElementById('results-display').style.display = 'block'; // Update Table document.getElementById('tableCalories').innerText = calories.toFixed(1); document.getElementById('tableSatFat').innerText = satFat.toFixed(1) + 'g'; document.getElementById('tableSugar').innerText = sugar.toFixed(1) + 'g'; document.getElementById('tableSodium').innerText = sodium.toFixed(0) + 'mg'; document.getElementById('tableProtein').innerText = protein.toFixed(1) + 'g'; document.getElementById('tableFiber').innerText = fiber.toFixed(1) + 'g'; document.getElementById('pointsFromCalories').innerText = Math.round(caloriesPoints); document.getElementById('pointsFromSatFat').innerText = Math.round(satFatPoints); document.getElementById('pointsFromSugar').innerText = Math.round(sugarPoints); document.getElementById('pointsFromSodium').innerText = Math.round(sodiumPoints); document.getElementById('pointsFromProtein').innerText = '-' + Math.round(proteinPoints); document.getElementById('pointsFromFiber').innerText = '-' + Math.round(fiberPoints); updateChart(finalPoints, caloriesPoints, satFatPoints, sugarPoints, sodiumPoints, proteinPoints, fiberPoints); } function resetCalculator() { document.getElementById('servings').value = 4; document.getElementById('caloriesPerServing').value = 350; document.getElementById('saturatedFatPerServing').value = 5; document.getElementById('sugarPerServing').value = 10; document.getElementById('sodiumPerServing').value = 500; document.getElementById('proteinPerServing').value = 20; document.getElementById('fiberPerServing').value = 3; document.getElementById('results-display').style.display = 'none'; document.querySelectorAll('.error-message').forEach(function(el) { el.innerText = ''; el.classList.remove('visible'); }); document.querySelectorAll('input[type="number"], select').forEach(function(input) { input.style.borderColor = '#ccc'; }); // Clear table document.getElementById('tableCalories').innerText = '–'; document.getElementById('tableSatFat').innerText = '–'; document.getElementById('tableSugar').innerText = '–'; document.getElementById('tableSodium').innerText = '–'; document.getElementById('tableProtein').innerText = '–'; document.getElementById('tableFiber').innerText = '–'; document.getElementById('pointsFromCalories').innerText = '–'; document.getElementById('pointsFromSatFat').innerText = '–'; document.getElementById('pointsFromSugar').innerText = '–'; document.getElementById('pointsFromSodium').innerText = '–'; document.getElementById('pointsFromProtein').innerText = '–'; document.getElementById('pointsFromFiber').innerText = '–'; updateChart(0, 0, 0, 0, 0, 0, 0); // Clear chart } function copyResults() { var mainResult = document.getElementById('mainResult').innerText; var calories = document.getElementById('caloriesResult').innerText; var satFat = document.getElementById('satFatResult').innerText; var sugar = document.getElementById('sugarResult').innerText; var sodium = document.getElementById('sodiumResult').innerText; var protein = document.getElementById('proteinResult').innerText; var fiber = document.getElementById('fiberResult').innerText; var assumptions = "Key Assumptions:\n"; assumptions += "- Calories: " + calories + "\n"; assumptions += "- Saturated Fat: " + satFat + "\n"; assumptions += "- Sugar: " + sugar + "\n"; assumptions += "- Sodium: " + sodium + "\n"; assumptions += "- Protein: " + protein + "\n"; assumptions += "- Fiber: " + fiber + "\n"; var textToCopy = "Estimated WW Recipe Points: " + mainResult + "\n\n" + assumptions; var textArea = document.createElement("textarea"); textArea.value = textToCopy; 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'; // Optionally show a temporary message to the user console.log(msg); } catch (err) { console.error('Unable to copy', err); } document.body.removeChild(textArea); } function updateChart(totalPoints, caloriesPoints, satFatPoints, sugarPoints, sodiumPoints, proteinPoints, fiberPoints) { var ctx = document.getElementById('pointsBreakdownChart').getContext('2d'); // Destroy previous chart instance if it exists if (window.myChart) { window.myChart.destroy(); } // Determine which components contribute positively and negatively var positiveContributions = [ caloriesPoints, satFatPoints, sugarPoints, sodiumPoints ]; var negativeContributions = [ Math.abs(proteinPoints), // Use absolute value for chart display Math.abs(fiberPoints) ]; var positiveLabels = ['Calories', 'Sat. Fat', 'Sugar', 'Sodium']; var negativeLabels = ['Protein', 'Fiber']; // Filter out zero contributions to avoid clutter var filteredPositiveData = []; var filteredPositiveLabels = []; for (var i = 0; i 0) { filteredPositiveData.push(positiveContributions[i]); filteredPositiveLabels.push(positiveLabels[i]); } } var filteredNegativeData = []; var filteredNegativeLabels = []; for (var i = 0; i 0) { filteredNegativeData.push(negativeContributions[i]); filteredNegativeLabels.push(negativeLabels[i]); } } var chartData = { labels: filteredPositiveLabels.concat(filteredNegativeLabels), datasets: [{ label: 'Points Contribution', data: filteredPositiveData.concat(filteredNegativeData), backgroundColor: [ 'rgba(255, 99, 132, 0.7)', // Calories 'rgba(54, 162, 235, 0.7)', // Sat Fat 'rgba(255, 206, 86, 0.7)', // Sugar 'rgba(75, 192, 192, 0.7)', // Sodium 'rgba(153, 102, 255, 0.7)',// Protein (negative) 'rgba(255, 159, 64, 0.7)' // Fiber (negative) ], borderColor: [ 'rgba(255, 99, 132, 1)', 'rgba(54, 162, 235, 1)', 'rgba(255, 206, 86, 1)', 'rgba(75, 192, 192, 1)', 'rgba(153, 102, 255, 1)', 'rgba(255, 159, 64, 1)' ], borderWidth: 1 }] }; // Check if there's any data to display if (chartData.labels.length > 0) { window.myChart = new Chart(ctx, { type: 'bar', data: chartData, options: { responsive: true, maintainAspectRatio: false, plugins: { title: { display: true, text: 'Points Breakdown per Serving', font: { size: 16 } }, legend: { display: false // Labels are shown on the x-axis for bar charts }, tooltip: { callbacks: { label: function(context) { var label = context.label || "; if (label) { label += ': '; } if (context.parsed.y !== null) { // Determine if it's a positive or negative contribution var pointValue = context.parsed.y; if (context.dataIndex < filteredPositiveLabels.length) { // Positive contribution label += pointValue.toFixed(0); } else { // Negative contribution label += '-' + pointValue.toFixed(0); } } return label; } } } }, scales: { y: { beginAtZero: false, // Allow negative values for protein/fiber if needed for scale visualization title: { display: true, text: 'Points' } } } } }); document.getElementById('chartContainer').innerHTML = ''; // Re-add canvas if it was cleared } else { document.getElementById('chartContainer').innerHTML = 'No data to display chart.'; } } // Initial calculation on page load if default values are present document.addEventListener('DOMContentLoaded', function() { // Trigger calculation only if inputs are not empty (they have defaults here) calculateWWPoints(); // Ensure canvas is added after potential clearing by updateChart if (!document.getElementById('pointsBreakdownChart')) { document.getElementById('chartContainer').innerHTML = "; } });

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