Calculating Points for Weight Watchers Point System

Weight Watchers Points Calculator: Track Your Progress :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-color: #ccc; –card-bg: #ffffff; –shadow: 0 2px 5px 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); line-height: 1.6; margin: 0; padding: 20px; display: flex; flex-direction: column; align-items: center; } .container { width: 100%; max-width: 960px; background-color: var(–card-bg); padding: 30px; border-radius: 8px; box-shadow: var(–shadow); margin-bottom: 40px; } h1, h2, h3 { color: var(–primary-color); text-align: center; margin-bottom: 20px; } h1 { font-size: 2.5em; } h2 { font-size: 2em; margin-top: 40px; } h3 { font-size: 1.5em; margin-top: 30px; } .calculator-section { background-color: var(–card-bg); padding: 30px; border-radius: 8px; box-shadow: var(–shadow); margin-bottom: 40px; } .loan-calc-container { display: flex; flex-direction: column; gap: 20px; } .input-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 15px; } .input-group label { font-weight: bold; color: var(–primary-color); } .input-group input, .input-group select { padding: 12px; border: 1px solid var(–border-color); border-radius: 5px; font-size: 1em; box-sizing: border-box; /* Ensure padding doesn't affect width */ } .input-group input:focus, .input-group select:focus { outline: none; border-color: var(–primary-color); box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2); } .input-group small { font-size: 0.85em; color: #6c757d; margin-top: 5px; } .error-message { color: #dc3545; font-size: 0.9em; margin-top: 5px; display: none; /* Hidden by default */ } .button-group { display: flex; gap: 15px; justify-content: center; margin-top: 25px; flex-wrap: wrap; /* Allow wrapping on smaller screens */ } button { padding: 12px 25px; border: none; border-radius: 5px; font-size: 1em; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease; } .btn-primary { background-color: var(–primary-color); color: white; } .btn-primary:hover { background-color: #003a7a; } .btn-success { background-color: var(–success-color); color: white; } .btn-success:hover { background-color: #218838; } .btn-secondary { background-color: #6c757d; color: white; } .btn-secondary:hover { background-color: #5a6268; } #results-container { margin-top: 30px; padding: 25px; border: 1px dashed var(–primary-color); border-radius: 8px; background-color: #eef7ff; text-align: center; } #results-container h3 { margin-top: 0; font-size: 1.8em; color: var(–primary-color); } .main-result { font-size: 2.5em; font-weight: bold; color: var(–success-color); margin: 10px 0 20px 0; display: inline-block; padding: 10px 20px; background-color: #e6f7ff; border-radius: 5px; } .intermediate-results, .formula-explanation { margin-top: 20px; font-size: 1em; text-align: left; border-top: 1px solid #eee; padding-top: 15px; } .intermediate-results p, .formula-explanation p { margin-bottom: 10px; } .intermediate-results strong, .formula-explanation strong { color: var(–primary-color); } table { width: 100%; border-collapse: collapse; margin-top: 25px; } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #ddd; } thead { background-color: var(–primary-color); color: white; } th { font-weight: bold; } tbody tr:nth-child(even) { background-color: #f2f2f2; } caption { caption-side: top; font-weight: bold; font-size: 1.1em; color: var(–primary-color); margin-bottom: 15px; text-align: left; } canvas { display: block; margin: 25px auto; max-width: 100%; height: auto !important; border: 1px solid var(–border-color); border-radius: 5px; } .article-content { width: 100%; max-width: 960px; background-color: var(–card-bg); padding: 30px; border-radius: 8px; box-shadow: var(–shadow); margin-top: 40px; } .article-content h2 { text-align: left; margin-top: 40px; } .article-content h3 { text-align: left; margin-top: 30px; } .article-content p { margin-bottom: 15px; } .article-content ul, .article-content ol { margin-left: 25px; margin-bottom: 15px; } .article-content li { margin-bottom: 8px; } .article-content a { color: var(–primary-color); text-decoration: none; } .article-content a:hover { text-decoration: underline; } .faq-item { margin-bottom: 20px; border-left: 3px solid var(–primary-color); padding-left: 15px; } .faq-item strong { display: block; font-size: 1.1em; color: var(–primary-color); margin-bottom: 5px; } #related-tools ul { list-style: none; padding: 0; } #related-tools li { margin-bottom: 15px; border-bottom: 1px solid #eee; padding-bottom: 10px; } #related-tools li:last-child { border-bottom: none; } .tooltip { position: relative; display: inline-block; cursor: help; border-bottom: 1px dotted var(–primary-color); } .tooltip .tooltiptext { visibility: hidden; width: 220px; background-color: #555; color: #fff; text-align: center; border-radius: 6px; padding: 5px 10px; position: absolute; z-index: 1; bottom: 125%; left: 50%; margin-left: -110px; opacity: 0; transition: opacity 0.3s; font-size: 0.9em; white-space: nowrap; } .tooltip:hover .tooltiptext { visibility: visible; opacity: 1; } @media (max-width: 768px) { .container, .calculator-section, .article-content { padding: 20px; } h1 { font-size: 2em; } h2 { font-size: 1.7em; } h3 { font-size: 1.3em; } .main-result { font-size: 2em; } button { width: 100%; margin-bottom: 10px; } .button-group { flex-direction: column; align-items: center; } .tooltip .tooltiptext { width: 180px; left: -90px; margin-left: 0; } }

Weight Watchers Points Calculator

Calculate your Weight Watchers (WW) points for common foods. Understand how macronutrients and serving sizes translate into points for better meal planning.

WW Points Calculator

Enter the total calories in one serving of the food.
Please enter a valid number for calories (0 or greater).
Enter the grams of saturated fat in one serving.
Please enter a valid number for saturated fat (0 or greater).
Enter the grams of total sugar in one serving.
Please enter a valid number for sugar (0 or greater).
Enter the milligrams of sodium in one serving.
Please enter a valid number for sodium (0 or greater).
Describe the serving size (e.g., 100g, 1 cup, 1 slice, 1 piece).
Serving size description is required.

Your Food's WW Points

0

WW Points (per serving)

Calorie Contribution: 0 Points

Saturated Fat Contribution: 0 Points

Sugar Contribution: 0 Points

Sodium Contribution: 0 Points

How Points Are Calculated

The Weight Watchers Points system assigns values based on the nutritional content of food. While the exact formula can vary slightly between WW program versions, a common approach for calculating "SmartPoints" or similar systems is:

Points = (Calories / 50) + (Saturated Fat / 12) + (Sugar / 5) + (Sodium / 500)

This formula aims to encourage consumption of foods lower in calories, saturated fat, sugar, and sodium, while being more forgiving towards foods with higher protein and fiber (though these are not directly in this simplified calculation).

{primary_keyword}

Understanding the Weight Watchers Points system is fundamental to successfully navigating the WW program. At its core, the system is designed to guide members toward healthier food choices by assigning a numerical value, or "point," to foods and beverages. This approach helps individuals develop a more mindful eating pattern, focusing on nutritional density rather than simply restricting calories. The goal is to make healthier eating simpler and more sustainable.

Who should use it? Anyone following a Weight Watchers program, or individuals looking for a structured way to assess the relative healthiness of different foods. It's particularly useful for those who find traditional calorie counting overwhelming or prefer a system that accounts for factors beyond just energy intake, such as sugar and saturated fat content. It helps in building a balanced diet by prioritizing nutrient-rich foods.

Common misconceptions about the Weight Watchers Points system include the belief that "zero-point" foods are unlimited and can be consumed without regard for portion size. While these foods are foundational to the plan due to their low energy density and high satiety, overconsumption can still hinder weight loss. Another misconception is that all processed foods are inherently bad; WW often includes processed items but encourages choosing those with a lower point value. The system is a tool for guidance, not a rigid restriction.

{primary_keyword} Formula and Mathematical Explanation

The mathematical foundation behind the Weight Watchers Points system aims to quantify the "healthiness" or "desirability" of a food item based on key nutritional components. While WW has evolved its algorithms over the years (from Blue Plan, Green Plan, Purple Plan to the current PersonalPoints system), a widely recognized and foundational formula for calculating points, particularly for systems like SmartPoints, serves as a good basis for understanding the principles. A common representation of this formula is:

Points = (Calories / 50) + (Saturated Fat / 12) + (Sugar / 5) + (Sodium / 500)

Let's break down each variable and its contribution:

  • Calories: These represent the total energy provided by a serving of food. Foods with higher calorie counts are generally assigned more points, reflecting their higher energy density.
  • Saturated Fat: This type of fat is often linked to cardiovascular health concerns. Foods high in saturated fat receive higher point values to discourage their excessive consumption.
  • Sugar: Added sugars contribute to calorie intake without significant nutritional benefit and can impact blood sugar levels. Higher sugar content increases the points assigned.
  • Sodium: Excessive sodium intake is associated with high blood pressure and other health issues. Foods high in sodium are penalized with more points.

The divisors (50, 12, 5, 500) are constants determined by WW to balance the impact of each nutrient. These values are crucial as they dictate how much each gram or milligram of a nutrient contributes to the final point score.

Variable Explanations and Table:

Weight Watchers Points Calculation Variables
Variable Meaning Unit Typical Range (per serving) Contribution to Points
Calories Energy content of the food kcal 0 – 1000+ Calories / 50
Saturated Fat Type of fat impacting heart health grams (g) 0 – 50+ Saturated Fat / 12
Sugar Total sugar content (including added) grams (g) 0 – 100+ Sugar / 5
Sodium Salt content milligrams (mg) 0 – 3000+ Sodium / 500

It's important to note that the current WW program (PersonalPoints) is highly personalized and considers individual factors and food preferences, going beyond this generalized formula. However, understanding this foundational calculation is key to grasping the principles of the WW Points system.

Practical Examples (Real-World Use Cases)

Let's apply the Weight Watchers Points system calculation to real-world food examples:

Example 1: Plain Non-Fat Yogurt

Consider a single serving (e.g., 1 cup or 245g) of plain non-fat yogurt:

  • Calories: 130 kcal
  • Saturated Fat: 0 g
  • Sugar: 13 g (natural sugars from lactose)
  • Sodium: 170 mg
  • Serving Size: 1 cup

Calculation:

Points = (130 / 50) + (0 / 12) + (13 / 5) + (170 / 500)

Points = 2.6 + 0 + 2.6 + 0.34

Total Points ≈ 5.54. Rounded up by WW, this might be 6 points per serving.

Interpretation: This yogurt has a moderate point value. The points come primarily from calories and sugar. It's a good option for a snack or breakfast base, but awareness of the sugar content is useful.

Example 2: Fried Chicken Breast (Breaded)

Consider a single serving (e.g., 1 medium breast, ~150g) of breaded, fried chicken breast:

  • Calories: 400 kcal
  • Saturated Fat: 10 g
  • Sugar: 2 g
  • Sodium: 800 mg
  • Serving Size: 1 medium breast (~150g)

Calculation:

Points = (400 / 50) + (10 / 12) + (2 / 5) + (800 / 500)

Points = 8 + 0.83 + 0.4 + 1.6

Total Points ≈ 10.83. Rounded up by WW, this might be 11 points per serving.

Interpretation: This serving of fried chicken carries a significantly higher point value. The high points are driven by calories, saturated fat, and sodium, largely due to the frying and breading process. This makes it a less frequent choice within a daily points budget.

Example 3: Medium Apple

Consider one medium apple (approx. 182g):

  • Calories: 95 kcal
  • Saturated Fat: 0.2 g
  • Sugar: 19 g (natural sugars)
  • Sodium: 2 mg
  • Serving Size: 1 medium apple

Calculation:

Points = (95 / 50) + (0.2 / 12) + (19 / 5) + (2 / 500)

Points = 1.9 + 0.017 + 3.8 + 0.004

Total Points ≈ 5.72. Rounded up by WW, this might be 6 points per serving.

Interpretation: While apples are nutritious fruits, their natural sugar content contributes significantly to their point value. They are often considered "higher point" foods within the WW framework, highlighting the system's focus on sugar.

How to Use This {primary_keyword} Calculator

Using this Weight Watchers Points calculator is straightforward and designed to give you quick insights into the point value of your food:

  1. Input Nutritional Information: Locate the nutritional label on your food packaging. Carefully enter the values for Calories, Saturated Fat (in grams), Sugar (in grams), and Sodium (in milligrams) per serving into the respective fields.
  2. Specify Serving Size: Enter a description of the serving size (e.g., "1 cup," "100g," "1 slice," "1 piece"). This helps you remember what the calculated points apply to.
  3. Calculate: Click the "Calculate Points" button. The calculator will process the numbers based on the common WW points formula.
  4. Review Results:
    • Main Result: The primary highlighted number shows the estimated WW Points for one serving of the food.
    • Intermediate Values: See the points breakdown from calories, saturated fat, sugar, and sodium. This helps you understand which component contributes most to the total point value.
    • Formula Explanation: A brief explanation of the underlying formula is provided for clarity.
  5. Make Decisions: Use the calculated points to decide if the food fits within your daily or weekly WW points budget. Prioritize foods with lower point values, especially those rich in protein and fiber, which are often emphasized in WW plans (though not directly calculated here).
  6. Copy Results: If you want to save or share the information, use the "Copy Results" button. This will copy the main point value, intermediate values, and serving size description to your clipboard.
  7. Reset: To clear the fields and start over with a new food item, click the "Reset" button. It will restore the default example values.

Decision-Making Guidance: This calculator helps you quantify choices. For example, comparing a fresh salad with a light vinaigrette to a creamy pasta dish reveals significant point differences. Use this tool to identify healthier alternatives or to understand why certain foods require more of your points budget.

Key Factors That Affect {primary_keyword} Results

Several factors influence the point value of foods within the Weight Watchers Points system and how you perceive them:

  1. Nutrient Density: Foods high in vitamins, minerals, fiber, and protein relative to their calories tend to have lower point values per serving. WW encourages choosing nutrient-dense options.
  2. Serving Size Accuracy: Inaccurate measurement of serving size is a common pitfall. If you consume more than the stated serving size, you consume more points. Using the "Serving Size" field is crucial for context.
  3. Processing and Preparation Methods: Frying, adding sauces, excessive oils, or sugars significantly increases calories, fat, and sugar, thereby increasing the point value compared to the raw or simply prepared version of the same food.
  4. Program Version: WW has updated its point calculation formulas over the years. The current PersonalPoints system is highly personalized, considering individual preferences and metabolism factors, making it different from older SmartPoints calculations. This calculator uses a common SmartPoints-like formula for illustration.
  5. Zero-Point Foods: WW designates certain healthy foods (like most fruits, vegetables, lean proteins) as "zero-point." These are foundational to the plan but can still lead to weight gain if overeaten. Their "zero" status is a program designation, not a lack of calories or nutrients.
  6. Sugar vs. Natural Sugars: While this calculator sums all sugars, WW historically differentiated between added sugars and natural sugars found in fruits and dairy. Foods high in natural sugars (like fruit) might have higher point values due to the sugar component, despite their other health benefits.
  7. Hidden Ingredients: Some foods contain surprising amounts of sugar, sodium, or unhealthy fats in ingredients you might not expect, like in bread, sauces, or even some "healthy" snacks. Always check labels.
  8. Individual Daily/Weekly Budget: The "impact" of a food's point value also depends on your personal WW points budget, which is set by the program based on individual factors like weight, height, age, activity level, and weight loss goals. A 5-point snack might be negligible for someone with a 30-point daily budget but significant for someone with a 15-point budget.

Frequently Asked Questions (FAQ)

Q1: Is the calculator result the exact official WW point value?

A: This calculator uses a common, generalized formula for illustration (similar to older SmartPoints). The official WW point values, especially with the current PersonalPoints system, are determined by WW's proprietary algorithm and may include additional factors or adjustments based on your personalized plan.

Q2: What are "Zero-Point" foods on Weight Watchers?

A: Zero-Point foods are a selection of healthy foods that WW designates as having no point value. These typically include most non-starchy vegetables, fruits, lean proteins (like chicken breast, fish, beans, tofu), and yogurt. They form the base of many meals, allowing members to eat satisfying portions without using points.

Q3: How does the calculator handle protein?

A: The simplified formula used here does not directly calculate points based on protein. Older WW systems sometimes offered bonus points for protein or fiber, while newer systems like PersonalPoints heavily personalize based on these factors and individual metabolism. This calculator focuses on the core negative contributors: calories, saturated fat, sugar, and sodium.

Q4: Can I use this calculator for all food types?

A: Yes, you can use this calculator for any food or beverage for which you have the nutritional information per serving. Just input the relevant data (calories, saturated fat, sugar, sodium) into the fields.

Q5: What is the difference between this calculator and the official WW app?

A: The official WW app has a comprehensive food database and uses WW's most current, personalized algorithms. This calculator provides an educational tool based on a common formula to help you understand the underlying principles of point calculation.

Q6: Should I aim for foods with the lowest possible points?

A: While lower points are generally encouraged, WW also emphasizes balance, satiety, and nutritional value. Focus on lower-point foods that are rich in protein and fiber to help you feel full and satisfied. Don't solely chase the lowest number if it means sacrificing nutrients or enjoyment.

Q7: What if a food has zero saturated fat and zero sugar?

A: If a nutrient is zero, the corresponding point contribution will be zero. For example, zero saturated fat means the 'Saturated Fat Contribution' will be 0 points.

Q8: How does sodium affect points?

A: Sodium contributes to the point value, with higher sodium content leading to more points. This encourages healthier choices by making high-sodium processed foods less appealing from a points perspective.

var calorieInput = document.getElementById('calories'); var saturatedFatInput = document.getElementById('saturatedFat'); var sugarInput = document.getElementById('sugar'); var sodiumInput = document.getElementById('sodium'); var servingSizeInput = document.getElementById('servingSize'); var resultsContainer = document.getElementById('results-container'); var mainResult = document.getElementById('main-result'); var caloriePointsSpan = document.getElementById('caloriePoints'); var fatPointsSpan = document.getElementById('fatPoints'); var sugarPointsSpan = document.getElementById('sugarPoints'); var sodiumPointsSpan = document.getElementById('sodiumPoints'); var copyBtn = document.getElementById('copyBtn'); var calorieError = document.getElementById('caloriesError'); var saturatedFatError = document.getElementById('saturatedFatError'); var sugarError = document.getElementById('sugarError'); var sodiumError = document.getElementById('sodiumError'); var servingSizeError = document.getElementById('servingSizeError'); function showError(elementId, message) { var errorElement = document.getElementById(elementId); if (errorElement) { errorElement.textContent = message; errorElement.style.display = 'block'; } } function hideError(elementId) { var errorElement = document.getElementById(elementId); if (errorElement) { errorElement.style.display = 'none'; } } function isValidNumber(value) { return !isNaN(parseFloat(value)) && isFinite(value) && parseFloat(value) >= 0; } function validateInputs() { var valid = true; var cal = parseFloat(calorieInput.value); if (!isValidNumber(cal)) { showError('caloriesError', 'Please enter a valid number for calories (0 or greater).'); valid = false; } else { hideError('caloriesError'); } var satFat = parseFloat(saturatedFatInput.value); if (!isValidNumber(satFat)) { showError('saturatedFatError', 'Please enter a valid number for saturated fat (0 or greater).'); valid = false; } else { hideError('saturatedFatError'); } var sug = parseFloat(sugarInput.value); if (!isValidNumber(sug)) { showError('sugarError', 'Please enter a valid number for sugar (0 or greater).'); valid = false; } else { hideError('sugarError'); } var sod = parseFloat(sodiumInput.value); if (!isValidNumber(sod)) { showError('sodiumError', 'Please enter a valid number for sodium (0 or greater).'); valid = false; } else { hideError('sodiumError'); } var servingSize = servingSizeInput.value.trim(); if (servingSize === ") { showError('servingSizeError', 'Serving size description is required.'); valid = false; } else { hideError('servingSizeError'); } return valid; } function calculatePoints() { if (!validateInputs()) { resultsContainer.style.display = 'none'; copyBtn.style.display = 'none'; return; } var calories = parseFloat(calorieInput.value); var saturatedFat = parseFloat(saturatedFatInput.value); var sugar = parseFloat(sugarInput.value); var sodium = parseFloat(sodiumInput.value); // WW Points Formula: (Calories / 50) + (Saturated Fat / 12) + (Sugar / 5) + (Sodium / 500) var pointsFromCalories = calories / 50; var pointsFromFat = saturatedFat / 12; var pointsFromSugar = sugar / 5; var pointsFromSodium = sodium / 500; var totalPoints = pointsFromCalories + pointsFromFat + pointsFromSugar + pointsFromSodium; // Rounding: Typically WW rounds up to the nearest whole number or half-point depending on the plan. // For this calculator, we'll round up to the nearest whole number for simplicity. var finalPoints = Math.ceil(totalPoints); caloriePointsSpan.textContent = Math.ceil(pointsFromCalories); fatPointsSpan.textContent = Math.ceil(pointsFromFat); sugarPointsSpan.textContent = Math.ceil(pointsFromSugar); sodiumPointsSpan.textContent = Math.ceil(pointsFromSodium); mainResult.textContent = finalPoints; resultsContainer.style.display = 'block'; copyBtn.style.display = 'inline-block'; } function resetCalculator() { calorieInput.value = '150'; saturatedFatInput.value = '5'; sugarInput.value = '10'; sodiumInput.value = '150'; servingSizeInput.value = '100g'; hideError('caloriesError'); hideError('saturatedFatError'); hideError('sugarError'); hideError('sodiumError'); hideError('servingSizeError'); resultsContainer.style.display = 'none'; copyBtn.style.display = 'none'; } function copyResults() { var servingSize = servingSizeInput.value.trim(); var resultText = "Food Item: (Not specified in calculator)\n"; resultText += "Serving Size: " + servingSize + "\n\n"; resultText += "Estimated WW Points: " + mainResult.textContent + "\n"; resultText += "—————————-\n"; resultText += "Points Breakdown:\n"; resultText += "- From Calories: " + caloriePointsSpan.textContent + " points\n"; resultText += "- From Saturated Fat: " + fatPointsSpan.textContent + " points\n"; resultText += "- From Sugar: " + sugarPointsSpan.textContent + " points\n"; resultText += "- From Sodium: " + sodiumPointsSpan.textContent + " points\n\n"; resultText += "Formula Used: (Calories / 50) + (Saturated Fat / 12) + (Sugar / 5) + (Sodium / 500)"; navigator.clipboard.writeText(resultText).then(function() { alert('Results copied to clipboard!'); }, function(err) { console.error('Failed to copy: ', err); alert('Failed to copy results. Please try manually.'); }); } // Initial calculation on load if values are present document.addEventListener('DOMContentLoaded', function() { calculatePoints(); }); // Add event listeners for real-time updates calorieInput.addEventListener('input', calculatePoints); saturatedFatInput.addEventListener('input', calculatePoints); sugarInput.addEventListener('input', calculatePoints); sodiumInput.addEventListener('input', calculatePoints); servingSizeInput.addEventListener('input', function() { validateInputs(); // Re-validate serving size specifically if (resultsContainer.style.display === 'block') { // If results are already displayed, update the serving size context if valid // No change to points, just ensures context is correct if it was initially invalid } }); // Canvas Chart var ctx = document.getElementById('wwChart').getContext('2d'); var wwChart = new Chart(ctx, { type: 'bar', // Changed to bar for better comparison of contributions data: { labels: ['Calories', 'Saturated Fat', 'Sugar', 'Sodium'], datasets: [{ label: 'Points Contribution per Serving', data: [0, 0, 0, 0], // Initial data backgroundColor: [ 'rgba(255, 99, 132, 0.6)', // Calories 'rgba(54, 162, 235, 0.6)', // Saturated Fat 'rgba(255, 206, 86, 0.6)', // Sugar 'rgba(75, 192, 192, 0.6)' // Sodium ], borderColor: [ 'rgba(255, 99, 132, 1)', 'rgba(54, 162, 235, 1)', 'rgba(255, 206, 86, 1)', 'rgba(75, 192, 192, 1)' ], borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Points' } } }, plugins: { legend: { display: false // Labels are on the x-axis }, tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || "; if (label) { label += ': '; } if (context.parsed.y !== null) { label += Math.ceil(context.parsed.y) + ' points'; // Show rounded points } return label; } } } } } }); // Update chart function function updateChart() { if (!validateInputs()) return; // Don't update if inputs are invalid var calories = parseFloat(calorieInput.value); var saturatedFat = parseFloat(saturatedFatInput.value); var sugar = parseFloat(sugarInput.value); var sodium = parseFloat(sodiumInput.value); var pointsFromCalories = calories / 50; var pointsFromFat = saturatedFat / 12; var pointsFromSugar = sugar / 5; var pointsFromSodium = sodium / 500; wwChart.data.datasets[0].data = [ Math.ceil(pointsFromCalories), Math.ceil(pointsFromFat), Math.ceil(pointsFromSugar), Math.ceil(pointsFromSodium) ]; wwChart.update(); } // Call updateChart whenever inputs change calorieInput.addEventListener('input', updateChart); saturatedFatInput.addEventListener('input', updateChart); sugarInput.addEventListener('input', updateChart); sodiumInput.addEventListener('input', updateChart); // Ensure chart is updated on initial load too document.addEventListener('DOMContentLoaded', function() { updateChart(); calculatePoints(); // Ensure calculation is also done });
Chart showing the point contribution from each major nutritional component per serving.

Leave a Comment