Weight Watchers Points Plus Target Calculator

Weight Watchers Points Plus Target Calculator :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-color: #ccc; –card-background: #fff; –error-color: #dc3545; } 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: 0; display: flex; flex-direction: column; align-items: center; padding-top: 20px; padding-bottom: 20px; } .container { width: 100%; max-width: 960px; margin: 0 auto; padding: 20px; background-color: var(–card-background); box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); border-radius: 8px; text-align: center; } h1, h2, h3 { color: var(–primary-color); } h1 { font-size: 2.5em; margin-bottom: 10px; } .subtitle { font-size: 1.2em; color: #666; margin-bottom: 30px; } .calculator-section { margin-top: 40px; padding: 30px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05); } .input-group { margin-bottom: 20px; text-align: left; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: var(–primary-color); } .input-group input[type="number"], .input-group select { width: calc(100% – 20px); padding: 12px 10px; border: 1px solid var(–border-color); border-radius: 4px; font-size: 1em; box-sizing: border-box; margin-bottom: 5px; } .input-group .helper-text { font-size: 0.85em; color: #6c757d; display: block; margin-top: 5px; } .error-message { color: var(–error-color); font-size: 0.9em; margin-top: 5px; display: block; min-height: 1.2em; } .button-group { margin-top: 25px; display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; } .btn { padding: 12px 25px; border: none; border-radius: 5px; font-size: 1.1em; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease; text-transform: uppercase; letter-spacing: 0.5px; } .btn-primary { background-color: var(–primary-color); color: white; } .btn-primary:hover { background-color: #003366; } .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: 40px; padding: 30px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05); text-align: center; } .primary-result { font-size: 2.8em; font-weight: bold; color: var(–primary-color); background-color: #e0f0ff; padding: 20px; border-radius: 8px; margin-bottom: 25px; display: inline-block; } .intermediate-results div, .formula-explanation { margin-bottom: 15px; font-size: 1.1em; color: #555; } .intermediate-results span { font-weight: bold; color: var(–primary-color); } .formula-explanation strong { color: var(–primary-color); } table { width: 100%; border-collapse: collapse; margin-top: 30px; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05); } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #eee; } th { background-color: var(–primary-color); color: white; font-weight: bold; } tr:nth-child(even) { background-color: #f8f9fa; } caption { font-size: 1.1em; margin-bottom: 15px; font-weight: bold; color: #555; caption-side: top; } .chart-container { margin-top: 30px; padding: 20px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05); } canvas { max-width: 100%; height: auto !important; /* Ensure canvas scales properly */ } .article-section { margin-top: 50px; padding: 30px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05); text-align: left; } .article-section h2 { text-align: center; margin-bottom: 25px; font-size: 2em; } .article-section h3 { margin-top: 30px; margin-bottom: 15px; color: var(–primary-color); font-size: 1.6em; border-bottom: 2px solid var(–primary-color); padding-bottom: 5px; } .article-section p { margin-bottom: 15px; color: #444; } .article-section ul, .article-section ol { margin-left: 20px; margin-bottom: 15px; } .article-section li { margin-bottom: 8px; } .faq-list dt { font-weight: bold; color: var(–primary-color); margin-top: 15px; margin-bottom: 5px; } .faq-list dd { margin-left: 20px; margin-bottom: 15px; } .internal-links-section ul { list-style: none; padding: 0; } .internal-links-section li { margin-bottom: 10px; } .internal-links-section a { color: var(–primary-color); text-decoration: none; font-weight: bold; } .internal-links-section a:hover { text-decoration: underline; } .internal-links-section p { font-style: italic; color: #666; margin-top: 5px; } @media (max-width: 768px) { h1 { font-size: 2em; } .subtitle { font-size: 1em; } .btn { width: 100%; margin-bottom: 10px; } .button-group { flex-direction: column; align-items: center; } }

Weight Watchers Points Plus Target Calculator

Accurately determine your daily PointsPlus™ target based on your personal attributes.

Calculate Your PointsPlus Target

Enter your current weight in kilograms.
Enter your height in centimeters.
Enter your age in years.
Female Male Select your gender.
Sedentary (Little to no exercise) Lightly Active (Light exercise/sports 1-3 days/week) Moderately Active (Moderate exercise/sports 3-5 days/week) Very Active (Hard exercise/sports 6-7 days a week) Extra Active (Very hard exercise/sports & physical job) Choose the option that best describes your lifestyle.

Your Results

BMR: kcal
TDEE: kcal
Activity Factor:
Formula Used: Your daily PointsPlus™ target is a derivation of your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE), adjusted by an activity factor, and then translated into the Weight Watchers PointsPlus™ system, which historically aimed to guide members toward healthier food choices.

Activity Level vs. TDEE

Estimated Total Daily Energy Expenditure (TDEE) across different activity levels for your profile.

What is Weight Watchers Points Plus Target?

The Weight Watchers Points Plus target calculator is a tool designed to help individuals estimate their daily calorie needs and translate them into a personalized PointsPlus™ allowance. This system, developed by Weight Watchers (now WW), aimed to simplify healthy eating by assigning a numerical value to foods based on their nutritional content, primarily focusing on calories, saturated fat, sugar, and protein. Understanding your PointsPlus™ target is crucial for effective weight management within the WW framework.

Who Should Use It: Anyone following or considering the Weight Watchers PointsPlus™ plan, individuals looking for a structured approach to portion control and healthier food choices, and those who want to gain a better understanding of their daily energy expenditure in relation to their food intake. It's particularly useful for those who find traditional calorie counting overwhelming and prefer a system that guides them toward more nutrient-dense options.

Common Misconceptions: A common misconception is that PointsPlus™ is solely about restriction. In reality, the system encourages mindful eating and understanding the nutritional value of foods. Another myth is that all low-point foods are "free foods" or equally healthy; while some foods have zero or low points due to their composition (like fruits and vegetables), the goal is balance and making informed choices from all food groups. It's not just about hitting a number, but about the quality of the foods consumed.

Weight Watchers Points Plus Target Formula and Mathematical Explanation

The calculation of a Weight Watchers Points Plus target involves several steps that first estimate your body's energy needs. While the exact proprietary algorithm used by Weight Watchers can vary and evolve, a common and effective method to approximate the target involves calculating your Basal Metabolic Rate (BMR), then your Total Daily Energy Expenditure (TDEE), and finally deriving a points target. Here, we use a standard approach based on established metabolic formulas.

Step 1: Calculate Basal Metabolic Rate (BMR)

BMR is the number of calories your body burns at rest to maintain basic functions like breathing, circulation, and cell production. We will use the Mifflin-St Jeor equation, which is widely considered accurate:

  • For Men: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
  • For Women: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161

Step 2: Calculate Total Daily Energy Expenditure (TDEE)

TDEE accounts for your BMR plus the calories burned through physical activity and the thermic effect of food. It's calculated by multiplying your BMR by an activity factor:

TDEE = BMR × Activity Factor

Step 3: Deriving the PointsPlus™ Target

The transition from TDEE (calories) to PointsPlus™ is where the proprietary nature of Weight Watchers comes into play. Historically, the PointsPlus™ system was designed so that a target number of points would roughly correspond to a healthy calorie deficit for weight loss. A common approximation suggests that 1 PointsPlus™ point is roughly equivalent to 10-15 calories, with an emphasis on nutrient density. For a target aiming for gradual weight loss (e.g., 1-2 lbs per week), a deficit is needed. A simplified approach for a target calculator often involves:

Approximate PointsPlus Target = (TDEE – Calorie Deficit) / Calories Per Point

A common daily target range for women in the PointsPlus era was around 26-29 points, and for men, it was higher, around 30-35 points. This calculator provides an estimate based on the factors, aiming to align with these historical ranges and the underlying principle of energy balance.

Variables Table:

Variable Meaning Unit Typical Range
Weight Body mass kg 30 – 200+ kg
Height Body length cm 120 – 200+ cm
Age Years since birth Years 10 – 90+ years
Gender Factor Biological sex adjustment for metabolism (Implicit in formula) 1 (Female) or 5 (Male)
Activity Factor Multiplier for physical activity level Multiplier 0.8 – 1.4
BMR Basal Metabolic Rate (calories at rest) kcal/day ~1000 – 2500+ kcal/day
TDEE Total Daily Energy Expenditure kcal/day ~1500 – 3500+ kcal/day
PointsPlus Target Estimated daily points allowance Points ~20 – 45+ Points

Practical Examples (Real-World Use Cases)

Let's illustrate how the Weight Watchers Points Plus target calculator works with practical scenarios.

Example 1: Sarah, a Moderately Active Woman

Sarah is a 35-year-old woman, weighs 70 kg, and is 165 cm tall. She exercises moderately 3-5 times a week.

  • Inputs: Weight: 70 kg, Height: 165 cm, Age: 35, Gender: Female (factor= -161), Activity Level: Moderately Active (factor= 1.12)
  • Calculation Steps:
    • BMR = (10 * 70) + (6.25 * 165) – (5 * 35) – 161 = 700 + 1031.25 – 175 – 161 = 1395.25 kcal
    • TDEE = 1395.25 * 1.12 = 1562.68 kcal
    • Estimated PointsPlus Target ≈ (1562.68 – 500) / 12.5 (assuming a deficit and ~12.5 kcal/point) ≈ 1062.68 / 12.5 ≈ 85 Points. (Note: This is a simplified estimation. WW's actual target would be derived from their specific formula.)
  • Calculator Output (Approximation): BMR: ~1395 kcal, TDEE: ~1563 kcal, Activity Factor: 1.12. The primary result will provide an estimated points target derived from these values using the calculator's specific logic.
  • Interpretation: Sarah's estimated daily points target reflects her moderate activity level, ensuring she consumes enough calories for energy while allowing for a deficit to support weight loss.

Example 2: John, a Sedentary Man

John is a 45-year-old man, weighs 95 kg, and is 180 cm tall. He has a sedentary job and exercises very little.

  • Inputs: Weight: 95 kg, Height: 180 cm, Age: 45, Gender: Male (factor= +5), Activity Level: Sedentary (factor= 0.8)
  • Calculation Steps:
    • BMR = (10 * 95) + (6.25 * 180) – (5 * 45) + 5 = 950 + 1125 – 225 + 5 = 1855 kcal
    • TDEE = 1855 * 0.8 = 1484 kcal
    • Estimated PointsPlus Target ≈ (1484 – 400) / 12.5 ≈ 1084 / 12.5 ≈ 86.7 Points. (Again, a simplification).
  • Calculator Output (Approximation): BMR: ~1855 kcal, TDEE: ~1484 kcal, Activity Factor: 0.8. The primary result will show the estimated points target.
  • Interpretation: Despite his higher weight, John's sedentary lifestyle results in a lower TDEE. His points target, derived from this lower energy expenditure, needs to account for a calorie deficit for weight loss. This highlights how activity level significantly impacts daily needs.

How to Use This Weight Watchers Points Plus Target Calculator

Using our Weight Watchers Points Plus target calculator is straightforward. Follow these simple steps to get your estimated daily PointsPlus™ target.

  1. Enter Your Weight: Input your current weight in kilograms (kg) into the "Current Weight (kg)" field.
  2. Enter Your Height: Input your height in centimeters (cm) into the "Height (cm)" field.
  3. Enter Your Age: Input your age in years into the "Age" field.
  4. Select Your Gender: Choose "Female" or "Male" from the "Gender" dropdown.
  5. Select Your Activity Level: Choose the option that best describes your typical weekly physical activity from the "Activity Level" dropdown. Be honest to get the most accurate estimate.
  6. Click Calculate: Press the "Calculate Target" button.

How to Read Results: The calculator will display your estimated daily PointsPlus™ target prominently. It will also show your calculated Basal Metabolic Rate (BMR), Total Daily Energy Expenditure (TDEE), and the Activity Factor used. The main result is your personalized daily points allowance, designed to support your weight management goals.

Decision-Making Guidance: Your calculated target is an estimate. Weight Watchers' official plans may have variations. Use this number as a guideline. Remember, the PointsPlus™ system encourages choosing nutrient-dense foods. Focus on whole foods, lean proteins, fruits, and vegetables, which often have fewer points for their volume and nutritional value. Adjust your intake based on your progress and how you feel. Consult with a healthcare provider or a registered dietitian for personalized advice.

Key Factors That Affect Weight Watchers Points Plus Results

Several factors influence your estimated Weight Watchers Points Plus target. Understanding these can help you interpret your results and make informed decisions about your weight management journey:

  1. Metabolism (BMR): Your Basal Metabolic Rate is the cornerstone. It's influenced by age, gender, muscle mass, and genetics. Younger individuals and men generally have higher BMRs. Building muscle through exercise can also increase your BMR over time.
  2. Body Composition: While weight is used, body composition (the ratio of fat mass to lean mass) plays a significant role. Muscle tissue burns more calories at rest than fat tissue. Someone with a higher percentage of muscle mass will have a higher TDEE, even at the same weight.
  3. Activity Level: This is one of the most variable factors. A sedentary lifestyle dramatically lowers your TDEE, requiring a lower points target for weight loss compared to someone with a highly active lifestyle who needs more energy.
  4. Age: Metabolism naturally tends to slow down with age. As you get older, your BMR decreases, which can impact your TDEE and consequently your PointsPlus™ target.
  5. Gender: Men typically have a higher metabolic rate than women due to generally having more muscle mass and less body fat, influencing BMR and TDEE calculations.
  6. Specific Weight Watchers Program Rules: It's crucial to remember that this calculator provides an *estimate*. The official Weight Watchers PointsPlus™ system has specific proprietary formulas, may include bonus points for certain healthy choices, and might adjust targets based on individual progress and program updates. Always refer to the official WW guidelines for the most accurate plan details.
  7. Calorie Deficit Goal: The ultimate goal of a weight loss target is to create a calorie deficit. The calculator's estimation of the PointsPlus™ target assumes a certain deficit is desired (e.g., to lose 1-2 lbs per week). The size of this deficit directly impacts the final points number.

Frequently Asked Questions (FAQ)

What is the difference between PointsPlus™ and the current WW Points system?
The PointsPlus™ system was replaced by subsequent WW programs, such as the current "Points" system (which often uses different values for foods and may have different daily targets). PointsPlus™ historically focused on calories, saturated fat, sugar, and protein. Newer systems might have different nutritional factors or focus areas.
Can I use this calculator if I'm not following the Weight Watchers program?
Yes, the underlying calculations for BMR and TDEE are standard metabolic estimates. While the final "PointsPlus" output is specific to WW, understanding your TDEE provides valuable insight into your daily calorie needs, which is useful for any weight management approach.
Why is my calculated target different from what my friend got on Weight Watchers?
Personal factors like weight, height, age, gender, and activity level are unique. Additionally, Weight Watchers' official algorithms may differ slightly, and their program might have specific considerations or variations not captured by a general calculator.
How often should I update my PointsPlus™ target?
You should recalculate your target whenever significant changes occur, such as a substantial weight loss or gain, a major change in your activity level, or if you reach a plateau. Regular recalculation helps ensure your target remains relevant to your current needs.
What does a "sedentary" activity level mean in this calculator?
A sedentary lifestyle typically involves minimal physical activity, such as a desk job with little to no intentional exercise. The activity factor for sedentary levels is the lowest, reflecting minimal additional calorie expenditure beyond basic metabolic functions.
Does this calculator account for "zero-point" foods?
This calculator estimates your daily *target points allowance*. It does not directly account for specific "zero-point" foods. Weight Watchers plans often allow unlimited consumption of certain healthy foods (like non-starchy vegetables and fruits) regardless of their point value, which complements your daily target.
What is a reasonable weight loss rate using PointsPlus™?
A safe and sustainable weight loss rate is typically considered 1-2 pounds per week. The PointsPlus™ system is designed to help achieve this by creating a moderate calorie deficit. This calculator helps set a target consistent with that goal.
Can I eat more points if I exercise more?
Traditionally, Weight Watchers programs have offered options for earning "Activity Points" or incorporating exercise into the plan. While this calculator uses a static activity factor for TDEE, the official WW plan might provide ways to adjust your intake based on increased exercise.

Related Tools and Internal Resources

© 2023 Your Website Name. All rights reserved.

var weightKgInput = document.getElementById("weightKg"); var heightCmInput = document.getElementById("heightCm"); var ageInput = document.getElementById("age"); var genderSelect = document.getElementById("gender"); var activityLevelSelect = document.getElementById("activityLevel"); var weightKgError = document.getElementById("weightKgError"); var heightCmError = document.getElementById("heightCmError"); var ageError = document.getElementById("ageError"); var resultDiv = document.getElementById("result"); var bmrResultSpan = document.getElementById("bmrResult").getElementsByTagName("span")[0]; var tdeeResultSpan = document.getElementById("tdeeResult").getElementsByTagName("span")[0]; var activityFactorResultSpan = document.getElementById("activityFactorResult").getElementsByTagName("span")[0]; var chart = null; var chartContext = null; function calculatePointsPlus() { clearErrors(); var weightKg = parseFloat(weightKgInput.value); var heightCm = parseFloat(heightCmInput.value); var age = parseInt(ageInput.value); var gender = parseInt(genderSelect.value); var activityFactor = parseFloat(activityLevelSelect.value); if (isNaN(weightKg) || weightKg <= 0) { weightKgError.textContent = "Please enter a valid weight (kg)."; return; } if (isNaN(heightCm) || heightCm <= 0) { heightCmError.textContent = "Please enter a valid height (cm)."; return; } if (isNaN(age) || age <= 0) { ageError.textContent = "Please enter a valid age."; return; } // BMR Calculation (Mifflin-St Jeor Equation) var bmr; if (gender === 1) { // Female bmr = (10 * weightKg) + (6.25 * heightCm) – (5 * age) – 161; } else { // Male bmr = (10 * weightKg) + (6.25 * heightCm) – (5 * age) + 5; } bmr = Math.max(0, bmr); // Ensure BMR is not negative // TDEE Calculation var tdee = bmr * activityFactor; tdee = Math.max(0, tdee); // Ensure TDEE is not negative // Approximate PointsPlus Target Calculation // This is a simplified estimation. WW's algorithm is proprietary. // We'll use a common approach assuming a deficit and approx calories per point. // Let's aim for a deficit of ~500 kcal for weight loss. // Let's assume ~12.5 kcal per PointsPlus point (historical average). var calorieDeficit = 500; var caloriesPerPoint = 12.5; var estimatedPointsTarget = (tdee – calorieDeficit) / caloriesPerPoint; // Ensure a minimum sensible points target and cap it if TDEE is very high if (tdee < 1500) { // Very low TDEE might indicate an issue or extreme circumstances estimatedPointsTarget = 25; // A minimum floor often seen in WW } else if (estimatedPointsTarget 50) { estimatedPointsTarget = 50; // Cap for very high TDEE to maintain a health focus } estimatedPointsTarget = Math.max(0, estimatedPointsTarget); // Final check for non-negativity resultDiv.textContent = estimatedPointsTarget.toFixed(1) + " Points"; bmrResultSpan.textContent = bmr.toFixed(0) + " kcal"; tdeeResultSpan.textContent = tdee.toFixed(0) + " kcal"; activityFactorResultSpan.textContent = activityFactor.toFixed(2); updateChart(tdee, activityFactor); } function clearErrors() { weightKgError.textContent = ""; heightCmError.textContent = ""; ageError.textContent = ""; } function resetCalculator() { weightKgInput.value = "70"; heightCmInput.value = "165"; ageInput.value = "35"; genderSelect.value = "1"; // Female activityLevelSelect.value = "1.12"; // Moderately Active clearErrors(); calculatePointsPlus(); // Recalculate with defaults } function copyResults() { var mainResult = resultDiv.textContent; var bmr = bmrResultSpan.textContent; var tdee = tdeeResultSpan.textContent; var activityFactor = activityFactorResultSpan.textContent; var resultsText = "Weight Watchers Points Plus Target Calculation:\n\n"; resultsText += "Estimated Daily Points Target: " + mainResult + "\n"; resultsText += "BMR: " + bmr + "\n"; resultsText += "TDEE: " + tdee + "\n"; resultsText += "Activity Factor Used: " + activityFactor + "\n\n"; resultsText += "Calculation based on: Weight, Height, Age, Gender, and Activity Level.\n"; resultsText += "Note: This is an estimate based on standard metabolic formulas."; // Use a temporary textarea for copying var textArea = document.createElement("textarea"); textArea.value = resultsText; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { document.execCommand('copy'); alert("Results copied to clipboard!"); } catch (e) { console.error("Failed to copy results: ", e); alert("Copying failed. Please copy manually."); } document.body.removeChild(textArea); } function updateChart(currentTdee, currentActivityFactor) { var weightKg = parseFloat(weightKgInput.value); var heightCm = parseFloat(heightCmInput.value); var age = parseInt(ageInput.value); var gender = parseInt(genderSelect.value); if (isNaN(weightKg) || isNaN(heightCm) || isNaN(age)) { // Cannot update chart if basic inputs are missing return; } var activityLevels = [ { label: "Sedentary", factor: 0.8 }, { label: "Lightly Active", factor: 1.0 }, { label: "Moderately Active", factor: 1.12 }, { label: "Very Active", factor: 1.24 }, { label: "Extra Active", factor: 1.4 } ]; var tdeeData = []; var pointsData = []; // Optional: show estimated points for context var baseBmr; if (gender === 1) { // Female baseBmr = (10 * weightKg) + (6.25 * heightCm) – (5 * age) – 161; } else { // Male baseBmr = (10 * weightKg) + (6.25 * heightCm) – (5 * age) + 5; } baseBmr = Math.max(0, baseBmr); var calorieDeficit = 500; var caloriesPerPoint = 12.5; activityLevels.forEach(function(level) { var tdee = baseBmr * level.factor; tdeeData.push({ x: level.label, y: Math.max(0, tdee) }); var estimatedPoints = (tdee – calorieDeficit) / caloriesPerPoint; if (tdee < 1500) { estimatedPoints = 25; } else if (estimatedPoints 50) { estimatedPoints = 50; } estimatedPoints = Math.max(0, estimatedPoints); pointsData.push({ x: level.label, y: estimatedPoints }); }); if (!chartContext) { chartContext = document.getElementById("tdeeChart").getContext("2d"); } if (chart) { chart.destroy(); } chart = new Chart(chartContext, { type: 'bar', // Using bar chart for better comparison across levels data: { labels: activityLevels.map(level => level.label), datasets: [{ label: 'Estimated TDEE (kcal)', data: tdeeData.map(d => d.y), backgroundColor: 'rgba(0, 74, 153, 0.6)', // Primary color borderColor: 'rgba(0, 74, 153, 1)', borderWidth: 1 }, { label: 'Estimated Points Target', data: pointsData.map(d => d.y), backgroundColor: 'rgba(40, 167, 69, 0.6)', // Success color borderColor: 'rgba(40, 167, 69, 1)', borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: true, // Allow aspect ratio control scales: { y: { beginAtZero: true, title: { display: true, text: 'Value' } } }, plugins: { legend: { position: 'top', }, title: { display: true, text: 'Estimated TDEE and Points Target by Activity Level' } } } }); } // Initial calculation and chart rendering on page load window.onload = function() { resetCalculator(); updateChart(); // Ensure chart is rendered initially }; // Add Chart.js library dynamically or ensure it's available globally // For a self-contained HTML file, we'll add it via CDN within the script tag or assume it's included in header. // For this example, assuming Chart.js is available globally. If not, you'd need to include it via CDN. // Example CDN inclusion (add this line within the or before the script tag): // // Check if Chart.js is loaded, if not, dynamically load it. if (typeof Chart === 'undefined') { var script = document.createElement('script'); script.src = 'https://cdn.jsdelivr.net/npm/chart.js'; script.onload = function() { // Re-run initial setup after Chart.js is loaded window.onload(); }; document.head.appendChild(script); } else { // If already loaded, just run the initial setup window.onload(); }

Leave a Comment