2020 Weight Watchers Calculator

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2020 Weight Watchers Calculator

Calculate your personalized 2020 Weight Watchers (WW) Points and SmartPoints to guide your weight loss journey.

WW Points Calculator (2020 System)

Enter your current weight in kilograms.
Enter your height in centimeters.
Enter your age in years.
Female Male Select your gender.
Sedentary (little or 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 Personalized WW Points

Daily SmartPoints Target:
Weekly Extra Points:
Estimated Basal Metabolic Rate (BMR): kcal
Estimated Total Daily Energy Expenditure (TDEE): kcal

SmartPoints are calculated based on a formula considering calories, saturated fat, sugar, and protein. The 2020 system uses a specific algorithm. This calculator provides an estimate based on your BMR and TDEE, adjusted for activity level and weight loss goals.

Points Breakdown Over Time

Visualizing daily and weekly points targets.

Key Calculation Variables

Variable Value Unit
Weight kg
Height cm
Age Years
Gender
Activity Level
BMR kcal
TDEE kcal

What is the 2020 Weight Watchers Calculator?

The 2020 Weight Watchers calculator is a tool designed to estimate the personalized daily and weekly points allowances for individuals following the Weight Watchers (WW) program, specifically referencing the system prevalent around the year 2020. WW, now known as WW International, has evolved its program over the years, with different iterations focusing on various point systems (e.g., PointsPlus, SmartPoints, PersonalPoints). The 2020 system, often referred to as SmartPoints, assigns a point value to foods based on a proprietary algorithm that considers nutritional factors like calories, saturated fat, sugar, and protein. This 2020 Weight Watchers calculator aims to provide a starting point for users by estimating these values based on personal biometrics and activity levels, helping them understand their initial targets for weight management.

Who should use it? Anyone embarking on or currently following the WW program, particularly those who are familiar with or aiming to understand the SmartPoints system used around 2020, can benefit from this calculator. It's especially useful for new members trying to grasp how their personal needs translate into daily food allowances or for existing members who want to verify their understanding of the system's basis. It serves as an educational tool to demystify the initial point assignments.

Common misconceptions: A frequent misconception is that the calculator provides an exact, official WW daily target. While it offers a close approximation based on publicly understood formulas and principles of the 2020 system, the official WW app and program provide the definitive, personalized targets. Another misconception is that points are solely based on weight; the 2020 system, and thus this calculator, incorporates multiple factors like height, age, gender, and activity level for a more holistic approach. Finally, some may think all low-point foods are "free," but the WW philosophy emphasizes mindful eating and balance, regardless of point value.

2020 Weight Watchers Calculator Formula and Mathematical Explanation

The core of the 2020 Weight Watchers calculator relies on estimating a user's energy needs and then translating those needs into the WW SmartPoints system. While the exact proprietary algorithm used by WW is confidential, the SmartPoints system is understood to be based on the following nutritional components:

  • Calories
  • Saturated Fat
  • Sugar
  • Protein

The calculation generally involves these steps:

  1. Calculate Basal Metabolic Rate (BMR): This is the number of calories your body burns at rest. A common formula used is the Mifflin-St Jeor equation, which is considered more accurate than older formulas like Harris-Benedict.
    • 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
  2. Calculate Total Daily Energy Expenditure (TDEE): This estimates the total calories burned per day, including physical activity. It's calculated by multiplying the BMR by an activity factor.
    • Sedentary: TDEE = BMR × 1.2
    • Lightly Active: TDEE = BMR × 1.375
    • Moderately Active: TDEE = BMR × 1.55
    • Very Active: TDEE = BMR × 1.725
    • Extra Active: TDEE = BMR × 1.9
  3. Estimate Daily SmartPoints Target: WW aims for a calorie deficit for weight loss. A common deficit is around 500-750 calories per day, which corresponds to roughly 1-1.5 lbs of weight loss per week. The daily SmartPoints target is derived from the TDEE, adjusted for this deficit and then converted into the WW points system. The exact conversion is proprietary, but it generally aims to guide users towards healthier food choices by assigning higher points to less nutritious options (high in calories, sat fat, sugar) and lower points to more nutritious ones (high in protein). A simplified approach often used for estimation suggests a daily point target related to TDEE, often around 26-35 points for many individuals, with adjustments based on specific program guidelines. The 2020 system's SmartPoints formula specifically penalizes sugar and saturated fat while rewarding protein.
  4. Calculate Weekly Extra Points: WW typically provides a set of "Extra" or "Bonus" points per week, which can be used for flexibility, special occasions, or to accommodate higher energy needs. This amount is often standardized or slightly adjusted based on initial weight and other factors, typically ranging from 10 to 35 points per week in the 2020 system.

Variables Table:

Variable Meaning Unit Typical Range
Weight Current body weight kg (or lbs) 30 – 250+ kg
Height Body height cm (or inches) 140 – 200+ cm
Age User's age Years 18 – 80+ years
Gender Biological sex Male / Female
Activity Level Frequency and intensity of physical activity Sedentary to Extra Active
BMR Calories burned at rest kcal 1000 – 2500+ kcal
TDEE Total daily calories burned kcal 1200 – 4000+ kcal
Daily SmartPoints Estimated daily food points allowance Points 20 – 50+ points
Weekly Extra Points Additional weekly points allowance Points 10 – 35+ points

Practical Examples (Real-World Use Cases)

Let's illustrate how the 2020 Weight Watchers calculator works with two distinct user profiles:

Example 1: Sarah, a Moderately Active Woman

Inputs:

  • Weight: 80 kg
  • Height: 168 cm
  • Age: 42 years
  • Gender: Female
  • Activity Level: Moderately Active

Calculation Steps (Illustrative):

  1. BMR Calculation (Female): (10 * 80) + (6.25 * 168) – (5 * 42) – 161 = 800 + 1050 – 210 – 161 = 1479 kcal
  2. TDEE Calculation: 1479 kcal * 1.55 (Moderately Active) = 2292 kcal
  3. Estimated Daily SmartPoints: Based on a TDEE of 2292 kcal and WW's 2020 algorithm principles (aiming for a deficit and healthier food choices), a likely target might be around 30-35 Daily SmartPoints. The calculator estimates: 32 Daily SmartPoints.
  4. Estimated Weekly Extra Points: A standard allowance for this profile might be around 21 Weekly Extra Points.

Interpretation: Sarah is estimated to need approximately 2292 calories daily to maintain her weight. Her target of 32 Daily SmartPoints encourages her to make choices that align with WW's nutritional guidelines, likely prioritizing lean proteins and vegetables while moderating intake of high-sugar and high-saturated-fat foods. The 21 Weekly Extra Points offer flexibility.

Example 2: Mark, a Sedentary Man

Inputs:

  • Weight: 105 kg
  • Height: 180 cm
  • Age: 55 years
  • Gender: Male
  • Activity Level: Sedentary

Calculation Steps (Illustrative):

  1. BMR Calculation (Male): (10 * 105) + (6.25 * 180) – (5 * 55) + 5 = 1050 + 1125 – 275 + 5 = 1905 kcal
  2. TDEE Calculation: 1905 kcal * 1.2 (Sedentary) = 2286 kcal
  3. Estimated Daily SmartPoints: With a TDEE of 2286 kcal and considering the 2020 SmartPoints system, Mark's estimated daily target might be around 30-35 points. The calculator estimates: 30 Daily SmartPoints.
  4. Estimated Weekly Extra Points: A standard allowance could be around 14 Weekly Extra Points.

Interpretation: Mark's daily energy expenditure is estimated at 2286 kcal. His 30 Daily SmartPoints target guides him towards nutrient-dense foods. Despite a similar TDEE to Sarah, his lower activity level and potentially different body composition might influence the exact point calculation within the WW system. The 14 Weekly Extra Points provide some buffer.

How to Use This 2020 Weight Watchers Calculator

Using the 2020 Weight Watchers calculator is straightforward and designed to provide quick insights into your potential WW points targets.

  1. Enter Your Details: In the input fields provided, accurately enter your current weight (in kilograms), height (in centimeters), age (in years), select your gender, and choose the activity level that best describes your lifestyle.
  2. Calculate: Click the "Calculate Points" button. The calculator will process your inputs using the estimated formulas for BMR, TDEE, and the principles of the 2020 WW SmartPoints system.
  3. Review Results: The results section will display your estimated:
    • Daily SmartPoints Target: This is your primary estimated allowance for food and drinks each day.
    • Weekly Extra Points: These are additional points you can use throughout the week for added flexibility.
    • BMR and TDEE: These provide context on your body's energy needs.
    The chart offers a visual representation of your daily and weekly targets, and the table summarizes the key variables used in the calculation.
  4. Understand the Formula: Read the brief explanation below the results to understand that SmartPoints are based on nutritional content (calories, saturated fat, sugar, protein) and that this calculator provides an estimate based on your personal profile and energy expenditure.
  5. Reset or Copy: Use the "Reset" button to clear the fields and start over with default values. Use the "Copy Results" button to copy the displayed information for your records or to share.

How to read results: The primary result, Daily SmartPoints, is your main guide for daily food intake. The Weekly Extra Points are a buffer. Remember these are estimates; your official WW plan will provide the precise numbers. Use these estimates to understand the *type* of food choices WW encourages – generally those lower in saturated fat and sugar, and higher in protein.

Decision-making guidance: Use these estimated points as a starting point for your WW journey. If you find you are consistently hungry or struggling to meet your targets, you might need to adjust your food choices towards more filling, lower-point options (like non-starchy vegetables and lean proteins) or consult the official WW program for guidance. The calculator helps you set realistic initial expectations.

Key Factors That Affect 2020 Weight Watchers Results

Several factors influence the points calculated by the 2020 Weight Watchers calculator and the effectiveness of the WW program itself:

  1. Individual Metabolism (BMR): As shown in the BMR calculation, factors like age, sex, height, and weight directly impact how many calories your body burns at rest. Younger individuals and those with more muscle mass generally have higher BMRs.
  2. Activity Level (TDEE Multiplier): The most variable component of daily energy expenditure is physical activity. A sedentary lifestyle requires fewer points than a highly active one. Accurately assessing your activity level is crucial for a realistic TDEE and subsequent points target. Using the calculator helps quantify this.
  3. Weight Loss Goals: The WW program is designed for weight loss, which requires a calorie deficit. The calculator estimates targets assuming a moderate deficit. If your goal is weight maintenance or gain (less common on WW), the targets would differ significantly.
  4. Nutritional Composition of Food: The core of the SmartPoints system is its focus on macronutrients. Foods high in saturated fat and sugar are penalized with more points, while protein-rich foods are rewarded. This encourages healthier food choices beyond just calorie counting. For instance, a candy bar might have fewer points than a serving of nuts of similar calorie count due to fat and sugar content.
  5. Portion Sizes: Even low-point foods can lead to weight gain if consumed in excessive quantities. The points system guides choices, but mindful portion control remains essential for successful weight loss.
  6. Hydration: While not directly in the points formula, adequate water intake is vital for metabolism and can help manage hunger, indirectly supporting adherence to the points plan.
  7. Sleep Quality: Poor sleep can affect hormones that regulate appetite (ghrelin and leptin), potentially increasing hunger and cravings, making it harder to stick to a points budget.
  8. Underlying Health Conditions: Certain medical conditions or medications can affect metabolism and weight. While the calculator doesn't account for these, they can influence individual results and may require consultation with a healthcare provider or WW coach.

Frequently Asked Questions (FAQ)

Q1: Is this calculator's result the official WW daily target?

A: This calculator provides an *estimated* daily SmartPoints target based on the principles of the 2020 WW system and common BMR/TDEE formulas. Your official target is determined by the WW program itself through their proprietary algorithm and app, which may include additional personalized factors.

Q2: What does "SmartPoints" mean in the 2020 system?

A: SmartPoints are the points system used by WW around 2020. Foods are assigned point values based on calories, saturated fat, sugar, and protein, aiming to guide users toward healthier, more nutrient-dense choices.

Q3: Can I use this calculator if I'm on a different WW plan (e.g., PersonalPoints)?

A: This calculator is specifically designed for the 2020 SmartPoints system. Newer plans like PersonalPoints have different algorithms and may not yield accurate results with this tool. It's best to use the official WW app for current plans.

Q4: Why is my estimated target different from what I remember?

A: WW program updates, individual changes in weight or activity level, and the inherent estimation nature of this calculator can all lead to differences. Always refer to your official WW tracking tool for the most current target.

Q5: What are "Weekly Extra Points"?

A: Weekly Extra Points are a set of additional points provided by WW each week. They offer flexibility for social events, larger meals, or days when you have higher energy needs. They are meant to supplement your daily points budget.

Q6: How do I convert my weight from pounds to kilograms for the calculator?

A: To convert pounds (lbs) to kilograms (kg), divide your weight in pounds by 2.2046. For example, 150 lbs / 2.2046 ≈ 68 kg.

Q7: Does the calculator account for exercise?

A: The calculator uses "Activity Level" to estimate your Total Daily Energy Expenditure (TDEE). While this factor includes general exercise, WW often provides separate "FitPoints" for specific workouts logged through their app or connected devices, which may adjust your overall allowance.

Q8: What if my calculated points seem too low or too high?

A: This calculator provides an estimate. If the numbers seem significantly off, double-check your inputs. Remember that WW aims for a sustainable calorie deficit. If you're consistently struggling, consider consulting a WW coach or a registered dietitian. You might need to focus on nutrient-dense, lower-point foods.

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var chartInstance = null; // Global variable to hold chart instance function calculateWWPoints() { // Input values var weightKg = parseFloat(document.getElementById("weightKg").value); var heightCm = parseFloat(document.getElementById("heightCm").value); var age = parseInt(document.getElementById("age").value); var gender = document.getElementById("gender").value; var activityLevel = document.getElementById("activityLevel").value; // Error handling for inputs var errors = false; if (isNaN(weightKg) || weightKg <= 0) { document.getElementById("weightKgError").textContent = "Please enter a valid weight (kg)."; document.getElementById("weightKgError").style.display = "block"; errors = true; } else { document.getElementById("weightKgError").textContent = ""; document.getElementById("weightKgError").style.display = "none"; } if (isNaN(heightCm) || heightCm <= 0) { document.getElementById("heightCmError").textContent = "Please enter a valid height (cm)."; document.getElementById("heightCmError").style.display = "block"; errors = true; } else { document.getElementById("heightCmError").textContent = ""; document.getElementById("heightCmError").style.display = "none"; } if (isNaN(age) || age 120) { document.getElementById("ageError").textContent = "Please enter a valid age (1-120)."; document.getElementById("ageError").style.display = "block"; errors = true; } else { document.getElementById("ageError").textContent = ""; document.getElementById("ageError").style.display = "none"; } if (errors) { return; // Stop calculation if there are errors } // Calculate BMR (Mifflin-St Jeor Equation) var bmr = 0; if (gender === "male") { bmr = (10 * weightKg) + (6.25 * heightCm) – (5 * age) + 5; } else { // female bmr = (10 * weightKg) + (6.25 * heightCm) – (5 * age) – 161; } bmr = Math.round(bmr); // Calculate TDEE based on activity level var tdee = 0; var activityMultiplier = 1.2; // Default to sedentary if (activityLevel === "lightly_active") { activityMultiplier = 1.375; } else if (activityLevel === "moderately_active") { activityMultiplier = 1.55; } else if (activityLevel === "very_active") { activityMultiplier = 1.725; } else if (activityLevel === "extra_active") { activityMultiplier = 1.9; } tdee = bmr * activityMultiplier; tdee = Math.round(tdee); // Estimate Daily SmartPoints (Simplified approximation for 2020 system) // This is a complex proprietary formula. We'll use a common estimation approach. // A typical deficit for weight loss is ~500-750 kcal/day. // WW aims for ~1-1.5 lbs/week loss. // Let's assume a target intake of TDEE – 500 kcal for estimation. // And a rough conversion factor (this is highly simplified). var estimatedCalorieTarget = tdee – 500; if (estimatedCalorieTarget < 1200) estimatedCalorieTarget = 1200; // Minimum reasonable intake // Simplified points estimation: roughly 50-60 kcal per point, adjusted for nutrition. // This is a VERY rough estimate. WW's actual formula is complex. // Let's use a range based on TDEE and common WW targets. var dailySmartPoints = 30; // Default starting point if (tdee < 1800) { dailySmartPoints = 28; } else if (tdee < 2200) { dailySmartPoints = 32; } else if (tdee 50) dailySmartPoints -= 2; if (gender === "male" && age < 30) dailySmartPoints += 1; if (dailySmartPoints 100) weeklyExtraPoints += 7; if (weightKg < 60) weeklyExtraPoints -= 7; if (weeklyExtraPoints char.toUpperCase()); document.getElementById("tableBMR").textContent = bmr; document.getElementById("tableTDEE").textContent = tdee; // Update Chart updateChart(dailySmartPoints, weeklyExtraPoints); } function resetCalculator() { document.getElementById("weightKg").value = 70; document.getElementById("heightCm").value = 165; document.getElementById("age").value = 35; document.getElementById("gender").value = "female"; document.getElementById("activityLevel").value = "sedentary"; // Clear errors document.getElementById("weightKgError").textContent = ""; document.getElementById("weightKgError").style.display = "none"; document.getElementById("heightCmError").textContent = ""; document.getElementById("heightCmError").style.display = "none"; document.getElementById("ageError").textContent = ""; document.getElementById("ageError").style.display = "none"; // Reset results display document.getElementById("dailySmartPoints").textContent = "–"; document.getElementById("weeklyExtraPoints").textContent = "–"; document.getElementById("bmrValue").textContent = "–"; document.getElementById("tdeeValue").textContent = "–"; // Reset table data document.getElementById("tableWeight").textContent = "–"; document.getElementById("tableHeight").textContent = "–"; document.getElementById("tableAge").textContent = "–"; document.getElementById("tableGender").textContent = "–"; document.getElementById("tableActivity").textContent = "–"; document.getElementById("tableBMR").textContent = "–"; document.getElementById("tableTDEE").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 dailyPoints = document.getElementById("dailySmartPoints").textContent; var weeklyPoints = document.getElementById("weeklyExtraPoints").textContent; var bmr = document.getElementById("bmrValue").textContent; var tdee = document.getElementById("tdeeValue").textContent; if (dailyPoints === "–") { alert("Please calculate results before copying."); return; } var assumptions = "Key Assumptions:\n"; assumptions += "- Gender: " + document.getElementById("tableGender").textContent + "\n"; assumptions += "- Activity Level: " + document.getElementById("tableActivity").textContent + "\n"; assumptions += "- Based on 2020 WW SmartPoints estimation principles.\n"; assumptions += "- Official WW targets may vary.\n"; var resultsText = "WW Points Calculation Results:\n"; resultsText += "—————————–\n"; resultsText += "Daily SmartPoints Target: " + dailyPoints + "\n"; resultsText += "Weekly Extra Points: " + weeklyPoints + "\n"; resultsText += "Estimated BMR: " + bmr + " kcal\n"; resultsText += "Estimated TDEE: " + tdee + " kcal\n"; resultsText += "\n" + assumptions; // Use navigator.clipboard for modern browsers if (navigator.clipboard && navigator.clipboard.writeText) { navigator.clipboard.writeText(resultsText).then(function() { alert('Results copied to clipboard!'); }).catch(function(err) { console.error('Failed to copy text: ', err); // Fallback for older browsers or if permission denied copyToClipboardFallback(resultsText); }); } else { // Fallback for older browsers copyToClipboardFallback(resultsText); } } function copyToClipboardFallback(text) { var textArea = document.createElement("textarea"); textArea.value = text; // Make the textarea out of view textArea.style.position = "fixed"; textArea.style.left = "-9999px"; textArea.style.top = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied to clipboard!' : 'Failed to copy results.'; alert(msg); } catch (err) { console.error('Fallback: Oops, unable to copy', err); alert('Failed to copy results. Please copy manually.'); } document.body.removeChild(textArea); } function updateChart(dailyPoints, weeklyPoints) { var canvas = document.getElementById('pointsChart'); var ctx = canvas.getContext('2d'); // Destroy previous chart instance if it exists if (chartInstance) { chartInstance.destroy(); } // Ensure values are numbers, default to 0 if not available or invalid var daily = typeof dailyPoints === 'number' ? dailyPoints : 0; var weekly = typeof weeklyPoints === 'number' ? weeklyPoints : 0; // Create new chart instance chartInstance = new Chart(ctx, { type: 'bar', // Use bar chart for comparison data: { labels: ['Daily Target', 'Weekly Average'], datasets: [{ label: 'WW Points', data: [daily, weekly / 7], // Show daily average of weekly points backgroundColor: [ 'rgba(0, 74, 153, 0.6)', // Daily Target color 'rgba(40, 167, 69, 0.6)' // Weekly Average color ], borderColor: [ 'rgba(0, 74, 153, 1)', 'rgba(40, 167, 69, 1)' ], borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Points per Day' } } }, plugins: { legend: { display: false // Hide legend as labels are clear }, title: { display: true, text: 'Daily vs. Weekly Points Allocation (Weekly Avg)' } } } }); } // Initial calculation on page load document.addEventListener('DOMContentLoaded', function() { calculateWWPoints(); }); // Add Chart.js library dynamically if not present (for canvas chart) // In a real-world scenario, you'd include this in the if (typeof Chart === 'undefined') { var script = document.createElement('script'); script.src = 'https://cdn.jsdelivr.net/npm/chart.js'; document.head.appendChild(script); }

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