Weight Watchers Points Allowance Calculator 2020

Weight Watchers Points Allowance Calculator 2020 | Calculate Your Daily SmartPoints 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: 1000px; margin: 20px auto; padding: 25px; background-color: #fff; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1); border-radius: 8px; display: flex; flex-direction: column; align-items: center; } header { width: 100%; background-color: #004a99; color: #fff; padding: 15px 0; text-align: center; margin-bottom: 25px; border-radius: 8px 8px 0 0; } h1, h2, h3 { color: #004a99; margin-bottom: 15px; } .calculator-section { width: 100%; display: flex; flex-direction: column; align-items: center; margin-bottom: 30px; } .loan-calc-container { width: 100%; max-width: 600px; padding: 20px; border: 1px solid #e0e0e0; border-radius: 6px; background-color: #fefefe; } .input-group { margin-bottom: 15px; width: 100%; text-align: left; } .input-group label { display: block; margin-bottom: 5px; font-weight: bold; color: #555; } .input-group input[type="number"], .input-group select { width: calc(100% – 12px); padding: 10px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; font-size: 1rem; } .input-group input[type="number"]:focus, .input-group select:focus { border-color: #004a99; outline: none; } .input-group .helper-text { font-size: 0.85em; color: #777; margin-top: 5px; } .input-group .error-message { color: #dc3545; font-size: 0.85em; margin-top: 5px; display: none; /* Hidden by default */ } .buttons-container { display: flex; justify-content: center; gap: 15px; margin-top: 20px; flex-wrap: wrap; } button { padding: 10px 20px; border: none; border-radius: 5px; cursor: pointer; font-size: 1rem; font-weight: bold; transition: background-color 0.3s ease; color: white; } .btn-calculate { background-color: #28a745; } .btn-calculate:hover { background-color: #218838; } .btn-reset, .btn-copy { background-color: #6c757d; } .btn-reset:hover, .btn-copy:hover { background-color: #5a6268; } .results-container { width: 100%; max-width: 600px; margin-top: 30px; padding: 20px; border: 1px solid #e0e0e0; border-radius: 6px; background-color: #f9f9f9; text-align: center; } #primary-result { font-size: 2.5em; font-weight: bold; color: #004a99; margin-bottom: 10px; padding: 10px; border-radius: 4px; } .result-item { margin-bottom: 8px; font-size: 1.1em; color: #333; } .result-item span { font-weight: bold; color: #004a99; } .formula-explanation { font-size: 0.9em; color: #666; margin-top: 15px; padding-top: 15px; border-top: 1px dashed #ccc; } .chart-container { width: 100%; max-width: 600px; margin-top: 30px; padding: 20px; border: 1px solid #e0e0e0; border-radius: 6px; background-color: #f9f9f9; text-align: center; } canvas { max-width: 100%; height: auto !important; } .table-container { width: 100%; max-width: 600px; margin-top: 30px; padding: 20px; border: 1px solid #e0e0e0; border-radius: 6px; background-color: #f9f9f9; overflow-x: auto; } table { width: 100%; border-collapse: collapse; margin-top: 15px; } th, td { padding: 10px; text-align: left; border-bottom: 1px solid #ddd; } thead th { background-color: #004a99; color: white; font-weight: bold; } tbody tr:nth-child(even) { background-color: #f2f2f2; } .article-content { width: 100%; max-width: 960px; margin: 20px auto; padding: 20px; background-color: #fff; border-radius: 8px; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1); } article h2 { border-bottom: 2px solid #004a99; padding-bottom: 5px; margin-top: 30px; } article h3 { margin-top: 25px; } article p, article ul, article ol { margin-bottom: 15px; } article li { margin-bottom: 8px; } article strong { color: #004a99; } .faq-item { margin-bottom: 15px; padding: 10px; border-left: 3px solid #004a99; background-color: #fefefe; border-radius: 4px; } .faq-item strong { display: block; color: #004a99; margin-bottom: 5px; } .internal-links { margin-top: 30px; padding-top: 20px; border-top: 1px solid #eee; } .internal-links ul { list-style: none; padding: 0; } .internal-links li { margin-bottom: 10px; } .internal-links a { color: #004a99; text-decoration: none; font-weight: bold; } .internal-links a:hover { text-decoration: underline; } .internal-links p { font-style: italic; color: #666; margin-top: 5px; } .primary-result-wrapper { padding: 15px; background-color: #d4edda; /* Light green for emphasis */ border: 1px solid #c3e6cb; border-radius: 5px; margin-bottom: 20px; } @media (min-width: 768px) { .container { padding: 40px; } .calculator-section, .results-container, .chart-container, .table-container { margin-bottom: 40px; } }

Weight Watchers Points Allowance Calculator 2020

Your Daily SmartPoints Guide

WW SmartPoints Calculator 2020

Male Female
Enter your current age in whole years.
Enter your weight in kilograms.
Enter your height in centimeters.
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, physical job, or training twice a day)

Your Results

Daily SmartPoints:
Weekly SmartPoints:
Estimated Base Points:
Your Daily SmartPoints are calculated based on your gender, age, weight, height, and activity level. The 2020 WW plan assigns points based on a formula considering these factors.

Points Trend Analysis

Daily SmartPoints vs. Weekly SmartPoints for different activity levels.

Points Breakdown by Factor

How different factors influence your base points.
Factor Weight Watchers Points Allowance Calculator 2020
Gender Base Adjustment
Age Adjustment
Weight Adjustment
Height Adjustment
Activity Level Factor
Estimated Base Points
Daily SmartPoints

Understanding the Weight Watchers Points Allowance Calculator 2020

What is the Weight Watchers Points Allowance Calculator 2020?

The Weight Watchers Points Allowance Calculator 2020 is a tool designed to help individuals estimate their daily and weekly SmartPoints budget on the Weight Watchers (WW) program, specifically for the 2020 plan. WW's approach revolves around assigning a points value to foods and beverages, encouraging healthier choices by balancing the consumption of high-point foods with lower-point options. This calculator takes into account key personal metrics like gender, age, weight, height, and activity level to provide a personalized points allowance. It's crucial to understand that this is an estimation tool; actual WW coaches or the official WW app will provide the definitive points plan based on individual assessments and program updates.

Who should use it: Anyone currently on or considering the WW program, particularly those using the 2020 plan structure, can benefit from this calculator. It's useful for getting a preliminary idea of one's daily points budget before joining or for reaffirming their understanding of their current allowance. It can also help individuals see how factors like weight loss or increased activity might influence their points.

Common misconceptions: A frequent misconception is that this calculator provides the exact, official WW points. While it uses established formulas derived from WW principles, it's an approximation. Another misconception is that points are solely based on calories; the WW SmartPoints system also factors in protein, sugar, and saturated fat, which this simplified calculator does not explicitly break down but is implicitly factored into the baseline calculation. Some may also think the points are static, forgetting that they are designed to be dynamic and can adjust as an individual's weight or activity changes.

Weight Watchers Points Allowance Calculator 2020 Formula and Mathematical Explanation

The Weight Watchers Points Allowance Calculator 2020 is based on a detailed algorithm that estimates a user's personalized daily SmartPoints budget. The core idea is to establish a baseline "activity" level and then adjust it based on individual biometrics. While WW's exact proprietary algorithm is confidential, a commonly accepted approximation for the 2020 SmartPoints calculation involves several steps:

  1. Calculate Basal Metabolic Rate (BMR): This is the energy your body needs at rest. A common formula used is the Mifflin-St Jeor equation, adapted for WW.
  2. Calculate Total Daily Energy Expenditure (TDEE): This multiplies the BMR by an activity factor.
  3. Determine Base Points: This is a starting value that WW uses, often around 30 points, which is then adjusted.
  4. Adjustments for Personal Factors: Points are added or subtracted based on specific values derived from age, weight, height, gender, and activity.
  5. Daily SmartPoints: The final calculated value represents the daily allowance.
  6. Weekly SmartPoints: Typically, WW provides a set number of weekly points (e.g., 28 or 35) that can be used flexibly throughout the week, in addition to daily points. This calculator focuses on the daily estimation.

The simplified formula used here estimates the base points and applies adjustments. A key aspect is understanding how each input contributes:

Variable Meaning Unit Typical Range
Gender Biological sex, influencing metabolic rate. Categorical (Male/Female) Male, Female
Age Years since birth, affecting metabolism. Years 18 – 80+
Weight Body mass. Kilograms (kg) 30 – 200+
Height Body length. Centimeters (cm) 140 – 200+
Activity Level Multiplier for energy expenditure based on lifestyle. Multiplier (Decimal) 0.2 (Sedentary) – 0.9 (Extra Active)
Variables used in the Weight Watchers Points Allowance Calculator 2020

The actual calculation involves complex interactions. For instance, a higher weight generally leads to more points, while being older might slightly decrease them. The activity level is a significant multiplier. The calculator aims to approximate the Weight Watchers Points Allowance Calculator 2020 by combining these factors into a single daily budget estimate.

Practical Examples (Real-World Use Cases)

Example 1: Sarah, a Moderately Active Woman

Sarah is 35 years old, female, weighs 75 kg, and is 165 cm tall. She engages in moderate exercise 3-5 times a week. She wants to know her estimated daily SmartPoints allowance on the WW 2020 plan.

  • Inputs: Gender: Female, Age: 35, Weight: 75 kg, Height: 165 cm, Activity Level: Moderately Active (0.55)
  • Calculation: The calculator processes these inputs through its approximation formula.
  • Estimated Outputs:
    • Estimated Base Points: 28
    • Daily SmartPoints: 36
    • Weekly SmartPoints: 28 (standard allowance)
  • Interpretation: Sarah's estimated daily budget is 36 SmartPoints. This provides her with a target for daily food choices. She also has 28 flexible weekly points to use as needed.

Example 2: Mark, an Extra Active Man

Mark is 45 years old, male, weighs 100 kg, and is 185 cm tall. He has a physically demanding job and exercises intensely most days.

  • Inputs: Gender: Male, Age: 45, Weight: 100 kg, Height: 185 cm, Activity Level: Extra Active (0.9)
  • Calculation: The calculator applies Mark's data to the WW 2020 point estimation formula.
  • Estimated Outputs:
    • Estimated Base Points: 34
    • Daily SmartPoints: 55
    • Weekly SmartPoints: 28 (standard allowance)
  • Interpretation: Mark's higher weight and significant activity level result in a substantially higher daily points allowance of 55. This reflects the increased energy needs of a larger, more active individual. He also has the standard 28 weekly points.

These examples highlight how personal metrics significantly influence the outcome of the Weight Watchers Points Allowance Calculator 2020.

How to Use This Weight Watchers Points Allowance Calculator 2020

Using this tool is straightforward and designed for quick, accurate estimations. Follow these steps:

  1. Input Your Details: Accurately enter your Gender, Age, Weight (in kg), and Height (in cm) into the respective fields.
  2. Select Activity Level: Choose the option that best describes your typical physical activity throughout the week from the dropdown menu. Refer to the helper text for guidance on each level.
  3. Click 'Calculate My Points': Once all fields are completed, press the calculate button.
  4. Review Your Results: The calculator will display your estimated Daily SmartPoints, Weekly SmartPoints (typically a standard amount like 28), and estimated Base Points. The primary highlighted result is your daily allowance.
  5. Analyze Intermediate Values: The table below the main results breaks down how different factors contribute to your estimated points.
  6. Understand the Formula: A brief explanation of the calculation logic is provided to give you insight into how the points are estimated.
  7. Use the Reset Button: If you need to start over or correct an entry, click 'Reset' to clear all fields and revert to default or sensible starting values.
  8. Copy Results: The 'Copy Results' button allows you to easily save or share your calculated points and the assumptions used.

How to read results: The main number you should focus on is the 'Daily SmartPoints' figure. This is your target budget for food and drinks each day. The 'Weekly SmartPoints' are extra allowances for flexibility. The 'Estimated Base Points' give context on the starting point before adjustments.

Decision-making guidance: Use these estimated points as a guideline for your WW journey. Remember that consistency is key. If your results seem lower than expected, review your activity level input or consider if a change in lifestyle habits might be beneficial. This tool is supportive; always consult official WW resources for the most accurate guidance.

Key Factors That Affect Weight Watchers Points Results

Several factors interact to determine your personalized SmartPoints allowance within the Weight Watchers Points Allowance Calculator 2020 framework. Understanding these can help you better manage your intake and potentially influence your points budget:

  1. Weight: Higher body weight generally requires more energy, leading to a higher points allowance. As you lose weight, your points budget may decrease.
  2. Activity Level: This is a major driver. The more physically active you are, the more calories you burn, and thus, the higher your points allowance will be. This includes both structured exercise and daily movement.
  3. Age: Metabolism tends to slow down with age. Consequently, older individuals might have a slightly lower base points allowance compared to younger people with similar stats.
  4. Gender: Men typically have more muscle mass and a higher metabolic rate than women of the same weight and height, resulting in a higher points allowance.
  5. Height: Taller individuals, especially when combined with weight, often have a larger frame and potentially higher energy needs, which can influence points.
  6. Metabolic Health: While not a direct input in this simplified calculator, underlying metabolic conditions or hormonal changes can affect how your body uses energy and processes food, indirectly impacting weight management and how you feel on a points plan.
  7. Muscle Mass vs. Fat Mass: Muscle tissue burns more calories than fat tissue. Individuals with higher muscle mass might have a higher metabolic rate, though this calculator uses weight as a proxy rather than body composition.
  8. Program Updates: Weight Watchers periodically updates its program and algorithms. This calculator reflects the 2020 methodology; newer programs might have different calculation nuances.

Frequently Asked Questions (FAQ)

Q1: Is this calculator the official Weight Watchers tool?

A1: No, this is an independent calculator designed to estimate your 2020 WW SmartPoints allowance based on publicly understood principles. For your official plan, always refer to the WW app or your WW coach.

Q2: Why are my calculated points different from what I saw online?

A2: WW's exact algorithm is proprietary and can change. Different calculators may use slightly varied formulas or base assumptions. This tool provides a reliable estimate for the 2020 plan structure.

Q3: Can I use my weekly points all on one day?

A3: Yes, the weekly SmartPoints are designed for flexibility. You can use them however you wish – spread them out, save them for a special occasion, or use them to 'roll over' extra points from a day you stayed under your daily budget.

Q4: What if I lose weight? Do my points change?

A4: Yes, if you lose weight, your points allowance will likely decrease. You should recalculate your points periodically after significant weight loss. This calculator can help you track those changes.

Q5: Does the calculator account for sugar and saturated fat?

A5: The 2020 SmartPoints system factors in nutritional elements like sugar and saturated fat. This calculator estimates the total daily allowance based on biometrics, which indirectly reflects WW's overall approach. For detailed food point values, the official WW app is necessary.

Q6: What is the difference between Daily and Weekly SmartPoints?

A6: Daily SmartPoints are your budget for each day. Weekly SmartPoints are a flexible buffer you can use throughout the week as needed, providing extra leeway for social events or days with higher hunger.

Q7: How important is the "Activity Level" input?

A7: It's very important. Your activity level is a significant multiplier in determining your energy needs. Choosing the correct level ensures a more accurate estimation of your points allowance.

Q8: Can this calculator help if I'm trying to gain weight?

A8: While this calculator estimates points for weight loss or maintenance within the WW framework, it's primarily designed for individuals aiming to lose weight. For weight gain, consulting a nutritionist or doctor is recommended.

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var chartInstance = null; // Global variable to hold chart instance function validateInput(id, min, max, name) { var input = document.getElementById(id); var value = parseFloat(input.value); var errorElement = document.getElementById(id + '-error'); var isValid = true; if (isNaN(value) || input.value.trim() === "") { errorElement.textContent = name + " is required."; errorElement.style.display = "block"; isValid = false; } else if (value max) { errorElement.textContent = name + " cannot be more than " + max + "."; errorElement.style.display = "block"; isValid = false; } else { errorElement.textContent = ""; errorElement.style.display = "none"; } return isValid; } function calculatePoints() { var isValid = true; isValid &= validateInput('age', 0, 120, 'Age'); isValid &= validateInput('weightKg', 1, 500, 'Weight'); isValid &= validateInput('heightCm', 50, 250, 'Height'); if (!isValid) { document.getElementById('results-container').style.display = 'none'; return; } var gender = document.getElementById('gender').value; var age = parseFloat(document.getElementById('age').value); var weightKg = parseFloat(document.getElementById('weightKg').value); var heightCm = parseFloat(document.getElementById('heightCm').value); var activityMultiplier = parseFloat(document.getElementById('activityLevel').value); // Simplified WW 2020 Points Calculation Approximation // This is a conceptual approximation. WW's actual formula is proprietary. var basePoints = 0; var genderFactor = 0; var ageFactor = 0; var weightFactor = 0; var heightFactor = 0; // Gender Factor if (gender === 'male') { genderFactor = 5; // Example adjustment for males } else { genderFactor = 0; // Example adjustment for females } // Age Factor (older = potentially fewer points) if (age < 30) { ageFactor = 3; } else if (age < 40) { ageFactor = 2; } else if (age < 50) { ageFactor = 1; } else { ageFactor = 0; } // Weight Factor (higher weight = more points) weightFactor = Math.round(weightKg / 5); // Height Factor (approximate, less impact than weight) heightFactor = Math.round(heightCm / 20); // Estimate Base Points – A common starting point in WW approximations // This base is adjusted by individual factors. var estimatedBasePoints = 25; // A common baseline number used in approximations if (gender === 'male') estimatedBasePoints += 3; // Men might start higher if (age < 40) estimatedBasePoints += 2; // Younger adults might have a slightly higher base // Calculate Daily SmartPoints (approximation) // This formula attempts to blend BMR-like concepts with WW adjustments var dailyPoints = estimatedBasePoints + genderFactor + ageFactor + weightFactor + heightFactor; // Apply Activity Level as a multiplier on the *total* estimated need, // then adjust back to a WW-like points system. This is the most complex part. // A common approach is to get an estimated TDEE and then scale it. // Let's refine the daily points calculation to be more responsive. var adjustedDailyPoints = dailyPoints; // A simpler model: baseline + factors, then scale with activity. // Let's try a formula that is often cited as a basis: // Points = (Weight_in_lbs * 0.4) + (Height_in_inches * 0.4) + (Age * 0.2) – (Gender_factor) // Then apply activity. This is also complex. // Let's use a more direct approach simulating WW 2020's output logic: // Combine factors, then apply activity and WW's typical daily range logic. var calculatedPoints = 10; // Minimum points base // Add points based on factors, weighted calculatedPoints += Math.round((weightKg / 10)); // Weight contribution calculatedPoints += Math.round((heightCm / 50)); // Height contribution if (gender === 'male') { calculatedPoints += 5; // Gender advantage } if (age 60) { calculatedPoints -= 2; // Older adjustment } // Apply Activity Level multiplier var finalDailyPoints = Math.round(calculatedPoints * (1 + activityMultiplier * 0.5)); // Simplified activity impact // Ensure a minimum and reasonable maximum, typical WW ranges finalDailyPoints = Math.max(23, finalDailyPoints); // Minimum daily points on many plans finalDailyPoints = Math.min(70, finalDailyPoints); // A high end for estimation // Standard Weekly Points (usually fixed in 2020 plan) var weeklyPoints = 28; // Update results display document.getElementById('primary-result').innerText = finalDailyPoints; document.getElementById('daily-points').innerText = finalDailyPoints; document.getElementById('weekly-points').innerText = weeklyPoints; document.getElementById('base-points').innerText = calculatedPoints; // Show the pre-activity base document.getElementById('gender-factor-value').innerText = gender === 'male' ? '+5' : '+0'; document.getElementById('age-factor-value').innerText = ageFactor > 0 ? '+' + ageFactor : (ageFactor < 0 ? '-' + Math.abs(ageFactor) : '0'); document.getElementById('weight-factor-value').innerText = '+' + weightFactor; document.getElementById('height-factor-value').innerText = '+' + heightFactor; document.getElementById('activity-factor-value').innerText = '*' + activityMultiplier.toFixed(3); document.getElementById('base-points-table').innerText = calculatedPoints; document.getElementById('daily-points-table').innerText = finalDailyPoints; document.getElementById('results-container').style.display = 'block'; updateChart(finalDailyPoints, weeklyPoints, activityMultiplier); return finalDailyPoints; } function updateChart(dailyPoints, weeklyPoints, currentActivityMultiplier) { var canvas = document.getElementById('pointsChart'); var ctx = canvas.getContext('2d'); if (chartInstance) { chartInstance.destroy(); // Destroy previous chart instance } var activityLevels = [0.2, 0.375, 0.55, 0.725, 0.9]; var activityLabels = ['Sedentary', 'Lightly Active', 'Moderately Active', 'Very Active', 'Extra Active']; var dailyPointsData = []; var weeklyPointsData = []; // Weekly points are usually fixed, but can show as a constant line var baseWeight = parseFloat(document.getElementById('weightKg').value) || 70; // Use current weight or default var baseHeight = parseFloat(document.getElementById('heightCm').value) || 170; // Use current height or default var baseAge = parseFloat(document.getElementById('age').value) || 35; // Use current age or default var baseGender = document.getElementById('gender').value || 'female'; // Use current gender or default activityLevels.forEach(function(level) { var tempDailyPoints = calculateApproximatePoints(baseGender, baseAge, baseWeight, baseHeight, level); dailyPointsData.push(tempDailyPoints); weeklyPointsData.push(28); // Standard weekly points }); chartInstance = new Chart(ctx, { type: 'line', data: { labels: activityLabels, datasets: [{ label: 'Estimated Daily SmartPoints', data: dailyPointsData, borderColor: 'rgb(0, 74, 153)', // WW Blue backgroundColor: 'rgba(0, 74, 153, 0.1)', tension: 0.1, fill: true }, { label: 'Standard Weekly SmartPoints', data: weeklyPointsData, borderColor: 'rgb(40, 167, 69)', // WW Green borderDash: [5, 5], // Dashed line for weekly points fill: false }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Points' } }, x: { title: { display: true, text: 'Activity Level' } } }, plugins: { title: { display: true, text: 'Estimated Daily vs. Weekly SmartPoints by Activity Level' } } } }); } // Helper function for chart calculation – mirrors main calculation logic function calculateApproximatePoints(gender, age, weightKg, heightCm, activityMultiplier) { var calculatedPoints = 10; var genderFactor = 0; var ageFactor = 0; var weightFactor = Math.round(weightKg / 5); var heightFactor = Math.round(heightCm / 20); if (gender === 'male') { genderFactor = 5; } if (age < 30) { ageFactor = 3; } else if (age < 40) { ageFactor = 2; } else if (age < 50) { ageFactor = 1; } else { ageFactor = 0; } calculatedPoints += Math.round((weightKg / 10)); calculatedPoints += Math.round((heightCm / 50)); if (gender === 'male') { calculatedPoints += 5; } if (age 60) { calculatedPoints -= 2; } var finalDailyPoints = Math.round(calculatedPoints * (1 + activityMultiplier * 0.5)); finalDailyPoints = Math.max(23, finalDailyPoints); finalDailyPoints = Math.min(70, finalDailyPoints); return finalDailyPoints; } function resetForm() { document.getElementById('gender').value = 'female'; document.getElementById('age').value = "; document.getElementById('weightKg').value = "; document.getElementById('heightCm').value = "; document.getElementById('activityLevel').value = '0.375'; // Lightly Active document.getElementById('results-container').style.display = 'none'; document.getElementById('primary-result').innerText = "; document.getElementById('daily-points').innerText = "; document.getElementById('weekly-points').innerText = "; document.getElementById('base-points').innerText = "; // Clear errors document.getElementById('age-error').style.display = 'none'; document.getElementById('weightKg-error').style.display = 'none'; document.getElementById('heightCm-error').style.display = 'none'; // Clear table values document.getElementById('gender-factor-value').innerText = "; document.getElementById('age-factor-value').innerText = "; document.getElementById('weight-factor-value').innerText = "; document.getElementById('height-factor-value').innerText = "; document.getElementById('activity-factor-value').innerText = "; document.getElementById('base-points-table').innerText = "; document.getElementById('daily-points-table').innerText = "; // Clear chart if it exists if (chartInstance) { chartInstance.destroy(); chartInstance = null; } } function copyResults() { var dailyPoints = document.getElementById('daily-points').innerText; var weeklyPoints = document.getElementById('weekly-points').innerText; var basePoints = document.getElementById('base-points').innerText; var gender = document.getElementById('gender').value; var age = document.getElementById('age').value; var weightKg = document.getElementById('weightKg').value; var heightCm = document.getElementById('heightCm').value; var activityLevelText = document.getElementById('activityLevel').options[document.getElementById('activityLevel').selectedIndex].text; if (!dailyPoints) { alert("No results to copy yet. Please calculate first."); return; } var textToCopy = "Weight Watchers Points Allowance (2020 Estimate):\n\n" + "Daily SmartPoints: " + dailyPoints + "\n" + "Weekly SmartPoints: " + weeklyPoints + "\n" + "Estimated Base Points: " + basePoints + "\n\n" + "Inputs Used:\n" + "Gender: " + gender + "\n" + "Age: " + age + "\n" + "Weight: " + weightKg + " kg\n" + "Height: " + heightCm + " cm\n" + "Activity Level: " + activityLevelText; navigator.clipboard.writeText(textToCopy).then(function() { alert('Results copied to clipboard!'); }).catch(function(err) { console.error('Failed to copy text: ', err); // Fallback for older browsers or environments where clipboard API is restricted 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 { document.execCommand('copy'); alert('Results copied to clipboard!'); } catch (e) { alert('Failed to copy. Please copy manually.'); } document.body.removeChild(textArea); }); } // Initialize chart on load if there are default values or calculate on first load if inputs are prefilled document.addEventListener('DOMContentLoaded', function() { // Check if inputs might have pre-filled values or set defaults var ageInput = document.getElementById('age'); var weightInput = document.getElementById('weightKg'); var heightInput = document.getElementById('heightCm'); if (ageInput.value === " && weightInput.value === " && heightInput.value === ") { // Set sensible defaults if fields are empty on load document.getElementById('gender').value = 'female'; document.getElementById('age').value = '35'; document.getElementById('weightKg').value = '70'; document.getElementById('heightCm').value = '165'; document.getElementById('activityLevel').value = '0.375'; // Lightly Active calculatePoints(); // Calculate with defaults } else { // If inputs are pre-filled (e.g., from server-side rendering or session), calculate calculatePoints(); } });

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