Calculate Goal Weight Weight Watchers

Weight Watchers Goal Weight Calculator body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f8f9fa; color: #333; line-height: 1.6; margin: 0; padding: 0; } .container { max-width: 960px; margin: 20px auto; padding: 20px; background-color: #ffffff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); } h1, h2, h3 { color: #004a99; text-align: center; margin-bottom: 1.5em; } h1 { font-size: 2.5em; margin-bottom: 0.5em; } h2 { font-size: 1.8em; border-bottom: 2px solid #004a99; padding-bottom: 0.5em; margin-top: 2em; } h3 { font-size: 1.3em; margin-top: 1.5em; color: #0056b3; } .calculator-section { background-color: #eef2f7; padding: 30px; border-radius: 8px; margin-bottom: 30px; box-shadow: inset 0 1px 3px rgba(0,0,0,0.05); } .calculator-section h2 { margin-top: 0; border-bottom: none; padding-bottom: 0; } .input-group { margin-bottom: 20px; display: flex; flex-direction: column; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: #004a99; } .input-group input[type="number"], .input-group select { padding: 10px 12px; border: 1px solid #ccc; border-radius: 4px; font-size: 1em; width: 100%; box-sizing: border-box; /* Ensures padding doesn't affect width */ transition: border-color 0.3s ease; } .input-group input[type="number"]:focus, .input-group select:focus { border-color: #007bff; outline: none; } .input-group .helper-text { font-size: 0.85em; color: #6c757d; margin-top: 5px; } .input-group .error-message { color: #dc3545; font-size: 0.8em; margin-top: 5px; min-height: 1.2em; /* Reserve space for error message */ } .button-group { text-align: center; margin-top: 25px; display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; } .button-group button { padding: 12px 25px; border: none; border-radius: 5px; font-size: 1em; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; color: white; } .button-group button:hover { transform: translateY(-2px); } #calculateBtn, #copyResultsBtn { background-color: #004a99; } #calculateBtn:hover { background-color: #003d80; } #resetBtn { background-color: #6c757d; } #resetBtn:hover { background-color: #5a6268; } #copyResultsBtn { background-color: #28a745; } #copyResultsBtn:hover { background-color: #218838; } .results-container { margin-top: 30px; background-color: #ffffff; padding: 25px; border-radius: 8px; border: 1px solid #e0e0e0; } .results-container h3 { margin-top: 0; color: #004a99; text-align: left; } .result-item { margin-bottom: 15px; font-size: 1.1em; color: #555; } .result-item span { font-weight: bold; font-size: 1.3em; color: #004a99; } .primary-result { background-color: #28a745; color: white; padding: 15px 20px; border-radius: 6px; margin-bottom: 20px; text-align: center; font-size: 1.5em; font-weight: bold; box-shadow: 0 4px 6px rgba(40, 167, 69, 0.3); } .intermediate-results div { margin-bottom: 10px; font-size: 1em; } .intermediate-results span { font-weight: bold; color: #004a99; } .formula-explanation { font-size: 0.9em; color: #6c757d; margin-top: 15px; padding-top: 10px; border-top: 1px dashed #ccc; text-align: center; } table { width: 100%; border-collapse: collapse; margin-top: 20px; box-shadow: 0 1px 5px rgba(0,0,0,0.05); } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #ddd; } thead { background-color: #004a99; color: white; } th { font-weight: bold; } tbody tr:nth-child(even) { background-color: #f2f2f2; } caption { font-size: 0.9em; color: #6c757d; margin-top: 10px; margin-bottom: 15px; font-style: italic; text-align: center; } canvas { display: block; margin: 30px auto; max-width: 100%; background-color: #ffffff; border-radius: 8px; border: 1px solid #e0e0e0; } .article-content { margin-top: 40px; background-color: #ffffff; padding: 30px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05); } .article-content p { margin-bottom: 1.2em; } .article-content ul, .article-content ol { margin-bottom: 1.2em; padding-left: 25px; } .article-content li { margin-bottom: 0.8em; } .article-content a { color: #004a99; text-decoration: none; font-weight: bold; } .article-content a:hover { text-decoration: underline; } .faq-item { margin-bottom: 1.5em; } .faq-item h3 { margin-bottom: 0.5em; text-align: left; color: #004a99; font-size: 1.2em; } .faq-item p { margin-bottom: 0; } #copyStatus { font-size: 0.9em; margin-top: 10px; color: #28a745; font-weight: bold; display: none; /* Hidden by default */ } /* Responsive adjustments */ @media (max-width: 768px) { .container { margin: 10px; padding: 15px; } h1 { font-size: 2em; } h2 { font-size: 1.5em; } .button-group { flex-direction: column; align-items: center; } .button-group button { width: 80%; max-width: 300px; } .results-container, .calculator-section, .article-content { padding: 20px; } }

Weight Watchers Goal Weight Calculator

Set your personalized Weight Watchers goal weight with confidence. This calculator helps you determine a healthy and sustainable target based on your current stats and Weight Watchers guidelines.

Your Goal Weight Calculator

Enter your current weight in pounds (lbs).
4′ 5′ 6′ 7′
Enter your height in feet and inches.
Enter your age in years.
Female Male Select your biological sex for more accurate BMI calculation.
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) Your typical weekly physical activity.

Your Goal Weight Insights

Your BMI:
Healthy Weight Range:
Target BMI:
Basal Metabolic Rate (BMR): — kcal/day

The Weight Watchers goal weight is often determined by aiming for a BMI within the healthy range (18.5-24.9) and considering individual factors. This calculator uses a standard BMI formula and common Weight Watchers target ranges, factoring in age, sex, and activity level for a personalized estimate. BMR is calculated using the Mifflin-St Jeor Equation.

Results copied successfully!
Healthy Weight Range vs. Your Goal BMI
Metric Value Notes
Current Weight — lbs Your starting point.
Height — ft — in Crucial for BMI calculation.
Current BMI Body Mass Index.
Target BMI Range 18.5 – 24.9 Standard healthy range.
Calculated Goal Weight — lbs Your personalized target.
Estimated BMR — kcal/day Calories burned at rest.

What is Weight Watchers Goal Weight?

{primary_keyword} is a personalized target weight determined by an individual's current health metrics, height, age, sex, and the established guidelines of Weight Watchers (WW). It's not just about hitting a number on the scale; it's about achieving a weight that promotes overall health, well-being, and sustainability through the WW program. This goal weight is typically aligned with a Body Mass Index (BMI) within the healthy range, while also taking into account personal preferences and the program's emphasis on sustainable lifestyle changes.

Who should use it: Anyone participating in or considering the Weight Watchers program who wants to establish a clear, health-focused, and achievable target weight. This includes individuals looking to lose weight, maintain a healthy weight, or simply understand what a healthy weight range looks like for them according to WW principles.

Common misconceptions: A primary misconception is that the goal weight is a one-size-fits-all number or that it's solely determined by a rigid BMI calculation. In reality, WW encourages personalized goals that consider individual health status, lifestyle, and the ability to maintain the weight loss long-term. Another myth is that the goal weight must be very low; WW promotes healthy ranges, not extreme thinness. The focus is on health and sustainable habits.

Weight Watchers Goal Weight Formula and Mathematical Explanation

Calculating a {primary_keyword} involves understanding Body Mass Index (BMI) and incorporating individual factors. While Weight Watchers uses a points system (PersonalPoints™) for daily food choices, the *goal weight* itself is often guided by established health metrics. The core concept relies on the BMI calculation, which provides a general guideline for healthy weight categories.

The BMI Formula:

BMI = (Weight in kilograms) / (Height in meters)²

Or, for imperial units (pounds and inches):

BMI = (Weight in pounds × 703) / (Height in inches)²

Deriving the Goal Weight:

  1. Determine Target BMI Range: The generally accepted healthy BMI range is 18.5 to 24.9. Weight Watchers often encourages members to aim for a BMI within this range.
  2. Calculate Target Weight from BMI: Rearranging the BMI formula to solve for weight:
    • Metric: Weight (kg) = BMI × (Height in meters)²
    • Imperial: Weight (lbs) = (BMI × (Height in inches)²) / 703
  3. Personalize with Other Factors: While BMI provides a range, factors like age, sex, muscle mass, bone density, and overall health influence the ideal goal weight within that range. The calculator uses a basal metabolic rate (BMR) estimation (Mifflin-St Jeor equation) and activity level to provide a more nuanced perspective, although BMR is primarily for calorie needs rather than setting the ultimate goal weight directly.

Mifflin-St Jeor Equation for BMR (used for context):

  • 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

The activity level then multiplies the BMR to estimate Total Daily Energy Expenditure (TDEE), indicating calorie needs for weight maintenance or loss, which indirectly supports the sustainability of a goal weight.

Variable Explanations

Variable Meaning Unit Typical Range
Current Weight The user's starting body weight. Pounds (lbs) 30 – 1000+
Height The user's physical stature. Feet & Inches e.g., 4'0″ to 7'0″
Age The user's age in years. Years 18 – 100+
Biological Sex Primary sex characteristics influencing metabolism. Male / Female Male, Female
Activity Level Frequency and intensity of physical activity. Category Sedentary to Extra Active
BMI Body Mass Index, a ratio of weight to height squared. kg/m² or lbs/in² * 703 18.5 – 24.9 (Healthy Range)
Goal Weight The target weight determined for health and sustainability. Pounds (lbs) Variable, within healthy BMI range.
BMR Basal Metabolic Rate; calories burned at rest. kcal/day 1000 – 2500+

Practical Examples (Real-World Use Cases)

Here are a couple of scenarios illustrating how the {primary_keyword} calculator works:

Example 1: Sarah's Weight Loss Target

Sarah, a 35-year-old female, is 5'6″ tall and currently weighs 175 lbs. She engages in moderate exercise 3-4 times a week. She wants to achieve a healthy weight using the Weight Watchers approach.

  • Inputs: Current Weight: 175 lbs, Height: 5'6″, Age: 35, Sex: Female, Activity Level: Moderately active.
  • Calculations:
    • Height in inches: (5 * 12) + 6 = 66 inches
    • Current BMI = (175 * 703) / (66 * 66) ≈ 28.3 (Overweight)
    • Healthy Weight Range (using BMI 18.5-24.9):
      • Lower end: (18.5 * 66 * 66) / 703 ≈ 114.6 lbs
      • Upper end: (24.9 * 66 * 66) / 703 ≈ 154.3 lbs
    • Target BMI for goal weight: Let's aim for a BMI of 22.
    • Goal Weight = (22 * 66 * 66) / 703 ≈ 136.5 lbs
    • Estimated BMR = (10 * 79.38) + (6.25 * 167.64) – (5 * 35) – 161 ≈ 1430 kcal/day (Weight converted to kg: 175 / 2.205 ≈ 79.38 kg; Height converted to cm: 167.64 cm)
  • Outputs:
    • Current BMI: 28.3
    • Healthy Weight Range: 115 – 154 lbs
    • Target BMI: 22
    • Calculated Goal Weight: Approximately 137 lbs
    • Estimated BMR: ~1430 kcal/day
  • Interpretation: Sarah's current weight is in the overweight BMI category. Her healthy weight range is between 115 and 154 lbs. A {primary_keyword} of around 137 lbs falls comfortably within this healthy range and aligns with a target BMI of 22. This provides a realistic and healthy objective for her Weight Watchers journey.

Example 2: David's Maintenance Target

David, a 50-year-old male, is 6'1″ tall and currently weighs 200 lbs. He is very active, exercising most days. He's successfully lost weight and wants to find a sustainable maintenance goal weight within the healthy BMI range.

  • Inputs: Current Weight: 200 lbs, Height: 6'1″, Age: 50, Sex: Male, Activity Level: Very active.
  • Calculations:
    • Height in inches: (6 * 12) + 1 = 73 inches
    • Current BMI = (200 * 703) / (73 * 73) ≈ 26.4 (Overweight)
    • Healthy Weight Range (using BMI 18.5-24.9):
      • Lower end: (18.5 * 73 * 73) / 703 ≈ 139.2 lbs
      • Upper end: (24.9 * 73 * 73) / 703 ≈ 188.2 lbs
    • Target BMI for goal weight: Let's target a BMI of 23.
    • Goal Weight = (23 * 73 * 73) / 703 ≈ 174.4 lbs
    • Estimated BMR = (10 * 90.7) + (6.25 * 185.42) – (5 * 50) + 5 ≈ 1713 kcal/day (Weight converted to kg: 200 / 2.205 ≈ 90.7 kg; Height converted to cm: 185.42 cm)
  • Outputs:
    • Current BMI: 26.4
    • Healthy Weight Range: 139 – 188 lbs
    • Target BMI: 23
    • Calculated Goal Weight: Approximately 174 lbs
    • Estimated BMR: ~1713 kcal/day
  • Interpretation: David's current weight places him in the overweight category. His healthy weight range spans from approximately 139 to 188 lbs. A {primary_keyword} of around 174 lbs is a suitable target, sitting comfortably within the upper half of the healthy range and likely more sustainable for a highly active individual. This provides a solid maintenance goal.

How to Use This Weight Watchers Goal Weight Calculator

Our calculator is designed to be intuitive and provide quick insights into your {primary_keyword}. Follow these simple steps:

  1. Enter Current Weight: Input your current weight in pounds (lbs). Be precise for the most accurate results.
  2. Input Height: Select your height in feet and then enter the remaining inches in the provided field. Ensure this is accurate.
  3. Provide Age: Enter your current age in years.
  4. Select Biological Sex: Choose 'Male' or 'Female'. This affects BMR calculations.
  5. Choose Activity Level: Select the option that best describes your typical weekly physical activity. This influences the context of your results, especially BMR and calorie needs.
  6. Click 'Calculate': Once all fields are completed, click the 'Calculate' button.

How to Read Results:

  • Primary Result (Goal Weight): This is your personalized target weight, designed to fall within a healthy BMI range and considering your inputs. It's a key number to aim for.
  • Current BMI: Shows your body mass index based on your current weight and height.
  • Healthy Weight Range: Displays the weight range corresponding to a BMI of 18.5-24.9 for your height. Your goal weight should ideally fall within this range.
  • Target BMI: The BMI value used to calculate your specific goal weight (often aiming for the middle of the healthy range).
  • Estimated BMR: Your Basal Metabolic Rate in kilocalories per day. This is the energy your body burns at rest and provides context for your overall energy needs.
  • Table Data: The table summarizes all your inputs and calculated metrics for easy reference.
  • Chart: Visualizes your current BMI and healthy weight range compared to your goal weight.

Decision-Making Guidance: Use the calculated goal weight as a benchmark. Remember that Weight Watchers emphasizes overall health, not just a number. Focus on creating sustainable habits, mindful eating, and regular activity. Consult with your doctor or a healthcare professional before making significant changes to your diet or exercise routine. If your calculated goal weight seems too low or too high given your body composition (e.g., high muscle mass), consider it a guideline and discuss with your WW coach or healthcare provider.

Key Factors That Affect {primary_keyword} Results

Several factors influence not only your current weight but also the calculation and attainment of a healthy {primary_keyword}. Understanding these is crucial for a successful weight management journey:

  1. Body Composition (Muscle vs. Fat): BMI is a general measure and doesn't distinguish between muscle and fat. Highly muscular individuals may have a higher BMI without being unhealthy. A {primary_keyword} should consider this; WW's focus on overall health and healthy eating habits helps address this nuance.
  2. Genetics: Individual genetic makeup plays a significant role in metabolism, body shape, and predisposition to weight gain or loss. While genetics aren't destiny, they can influence the ease or difficulty of reaching and maintaining a specific weight.
  3. Metabolic Rate (BMR & TDEE): Your basal metabolic rate (BMR) and total daily energy expenditure (TDEE) dictate how many calories you burn. Age, sex, muscle mass, and genetics affect these rates. A lower metabolism might require more effort to reach or maintain a lower goal weight.
  4. Age: Metabolism naturally tends to slow down with age, particularly after 30. This can make weight loss more challenging and may influence the sustainability of very low goal weights. The calculator accounts for age in BMR estimation.
  5. Hormonal Factors: Conditions like thyroid issues, PCOS (Polycystic Ovary Syndrome), and hormonal changes during menopause can significantly impact weight regulation, making it harder to achieve or maintain a specific {primary_keyword}.
  6. Lifestyle and Habits: Beyond diet and exercise, factors like sleep quality, stress levels, and hydration significantly affect hormones related to appetite and metabolism (like cortisol and ghrelin), influencing weight management and the ability to stick to a goal. WW emphasizes building healthy habits across all these areas.
  7. Medications: Certain medications can cause weight gain or interfere with weight loss efforts as a side effect. It's important to discuss any such impacts with your doctor.
  8. Bone Density and Frame Size: Individuals with larger bone structures naturally weigh more. While BMI doesn't account for this, it's a factor in determining a truly healthy and appropriate weight for an individual. WW coaching can help personalize goals beyond simple calculations.

Frequently Asked Questions (FAQ)

Q1: Is the Weight Watchers goal weight always based strictly on BMI?

A: While BMI is a primary reference for a healthy weight range, Weight Watchers encourages a personalized approach. Your goal weight should be one you can realistically achieve and maintain healthily. Factors like your lifestyle, energy needs, and overall well-being are considered, especially through WW coaching and their points system.

Q2: My calculated goal weight is lower than what I feel is right for me. What should I do?

A: BMI provides a guideline, not a strict rule. If you are muscular or have a larger frame, your healthy weight might be at the higher end of the BMI range or even slightly above it. Always prioritize how you feel, your energy levels, and consult with healthcare professionals or your WW coach to fine-tune your goal.

Q3: Can I have multiple goal weights on Weight Watchers?

A: Yes. Many members have an initial weight loss goal and then a second goal for weight maintenance. The maintenance goal is crucial for long-term success and is often a weight you feel comfortable and healthy at long-term.

Q4: How long does it typically take to reach a goal weight?

A: The time frame varies greatly depending on the starting weight, the goal weight, adherence to the program, metabolism, and lifestyle factors. Weight Watchers promotes sustainable weight loss, typically 1-2 pounds per week, meaning a 50 lb loss could take around 6-12 months.

Q5: Does the calculator consider muscle mass?

A: The calculator uses BMI, which does not directly differentiate between muscle and fat. However, the healthy weight range it provides is based on standard BMI classifications. For individuals with significant muscle mass, consulting a professional for a body composition analysis is recommended.

Q6: What happens after I reach my goal weight on Weight Watchers?

A: After reaching your weight loss goal, you transition to the maintenance phase. This involves continuing to follow the WW program principles, often with adjustments, to maintain your achieved weight and develop lifelong healthy habits.

Q7: Why is BMR important for goal weight setting?

A: BMR (Basal Metabolic Rate) indicates the minimum calories your body needs to function at rest. Understanding your BMR and TDEE (Total Daily Energy Expenditure) helps in creating a realistic calorie deficit for weight loss or maintaining your goal weight sustainably. It informs the dietary aspect of reaching and keeping your {primary_keyword}.

Q8: Should I aim for the middle or the lower end of the healthy BMI range?

A: This is a personal decision often guided by your coach and doctor. Aiming for the middle of the healthy BMI range (around 21-23) is often more sustainable and healthier long-term than aiming for the very lowest end, especially for individuals with higher muscle mass or specific body types.

Q9: How does Weight Watchers' points system relate to goal weight?

A: The WW points system (PersonalPoints™) guides daily food choices to help create a calorie deficit, facilitating weight loss towards your goal. While the calculator provides a target weight based on BMI, the WW program's structure helps you reach and maintain it through behavior change and nutritional guidance.

© 2023 Your Financial Website. All rights reserved.

function calculateGoalWeight() { // Clear previous errors document.getElementById('currentWeightError').textContent = "; document.getElementById('heightError').textContent = "; document.getElementById('ageError').textContent = "; var currentWeight = parseFloat(document.getElementById('currentWeight').value); var heightFeet = parseInt(document.getElementById('heightFeet').value); var heightInchesInput = parseFloat(document.getElementById('heightInches').value); var age = parseInt(document.getElementById('age').value); var sex = document.getElementById('sex').value; var activityLevel = document.getElementById('activityLevel').value; var resultsOutput = document.getElementById('resultsOutput'); var primaryResult = document.getElementById('primaryResult'); var bmiResultSpan = document.getElementById('bmiResult').querySelector('span'); var healthyWeightRangeSpan = document.getElementById('healthyWeightRange').querySelector('span'); var targetBMISpan = document.getElementById('targetBMI').querySelector('span'); var bmrResultSpan = document.getElementById('bmrResult').querySelector('span'); var tableCurrentWeight = document.getElementById('tableCurrentWeight'); var tableHeight = document.getElementById('tableHeight'); var tableCurrentBMI = document.getElementById('tableCurrentBMI'); var tableGoalWeight = document.getElementById('tableGoalWeight'); var tableBMR = document.getElementById('tableBMR'); // — Input Validation — var isValid = true; if (isNaN(currentWeight) || currentWeight <= 0) { document.getElementById('currentWeightError').textContent = 'Please enter a valid positive number for current weight.'; isValid = false; } if (isNaN(heightFeet) || heightFeet 7) { // This case is less likely with select but good practice document.getElementById('heightError').textContent = 'Please select a valid height in feet.'; isValid = false; } if (isNaN(heightInchesInput) || heightInchesInput 11) { document.getElementById('heightError').textContent = 'Please enter inches between 0 and 11.'; isValid = false; } if (isNaN(age) || age 120) { document.getElementById('ageError').textContent = 'Please enter a valid age between 1 and 120.'; isValid = false; } if (!isValid) { // Reset results if inputs are invalid primaryResult.textContent = '–'; bmiResultSpan.textContent = '–'; healthyWeightRangeSpan.textContent = '–'; targetBMISpan.textContent = '–'; bmrResultSpan.textContent = '–'; tableCurrentWeight.textContent = '– lbs'; tableHeight.textContent = '– ft — in'; tableCurrentBMI.textContent = '–'; tableGoalWeight.textContent = '– lbs'; tableBMR.textContent = '– kcal/day'; return; } // — Calculations — var totalHeightInches = (heightFeet * 12) + heightInchesInput; var heightMeters = totalHeightInches * 0.0254; var weightKg = currentWeight / 2.20462; var heightCm = totalHeightInches * 2.54; // Calculate Current BMI var currentBMI = (currentWeight * 703) / (totalHeightInches * totalHeightInches); currentBMI = currentBMI.toFixed(1); // Define Healthy BMI Range and Target BMI var minHealthyBMI = 18.5; var maxHealthyBMI = 24.9; var targetBMI = 22.0; // A common target within the healthy range // Calculate Healthy Weight Range var minHealthyWeight = (minHealthyBMI * totalHeightInches * totalHeightInches) / 703; var maxHealthyWeight = (maxHealthyBMI * totalHeightInches * totalHeightInches) / 703; minHealthyWeight = minHealthyWeight.toFixed(1); maxHealthyWeight = maxHealthyWeight.toFixed(1); // Calculate Goal Weight based on Target BMI var goalWeight = (targetBMI * totalHeightInches * totalHeightInches) / 703; goalWeight = goalWeight.toFixed(1); // Calculate BMR (Mifflin-St Jeor Equation) var bmr = 0; if (sex === 'female') { bmr = (10 * weightKg) + (6.25 * heightCm) – (5 * age) – 161; } else { // male bmr = (10 * weightKg) + (6.25 * heightCm) – (5 * age) + 5; } bmr = Math.round(bmr); // Update Results Display primaryResult.textContent = goalWeight + ' lbs'; bmiResultSpan.textContent = currentBMI; healthyWeightRangeSpan.textContent = minHealthyWeight + ' – ' + maxHealthyWeight + ' lbs'; targetBMISpan.textContent = targetBMI.toFixed(1); bmrResultSpan.textContent = bmr + ' kcal/day'; // Update Table tableCurrentWeight.textContent = currentWeight + ' lbs'; tableHeight.textContent = heightFeet + ' ft ' + heightInchesInput + ' in'; tableCurrentBMI.textContent = currentBMI; tableGoalWeight.textContent = goalWeight + ' lbs'; tableBMR.textContent = bmr + ' kcal/day'; // — Chart Update — updateChart(currentBMI, minHealthyWeight, maxHealthyWeight, goalWeight); } function updateChart(currentBMI, minHealthyWeight, maxHealthyWeight, goalWeight) { var ctx = document.getElementById('weightRangeChart').getContext('2d'); // Destroy previous chart instance if it exists if (window.weightRangeChartInstance) { window.weightRangeChartInstance.destroy(); } // Convert weights to numerical values for comparison var currentWeightVal = parseFloat(document.getElementById('currentWeight').value); var goalWeightVal = parseFloat(goalWeight); var minWeightVal = parseFloat(minHealthyWeight); var maxWeightVal = parseFloat(maxHealthyWeight); // Determine the maximum value for the y-axis to ensure all relevant points are visible var maxY = Math.max(currentWeightVal, goalWeightVal, maxWeightVal, 200); // Ensure a reasonable max range, default to 200 if smaller window.weightRangeChartInstance = new Chart(ctx, { type: 'bar', data: { labels: ['Current Weight', 'Goal Weight', 'Healthy Min', 'Healthy Max'], datasets: [{ label: 'Weight (lbs)', data: [currentWeightVal, goalWeightVal, minWeightVal, maxWeightVal], backgroundColor: [ 'rgba(0, 74, 153, 0.7)', // Current Weight 'rgba(40, 167, 69, 0.8)', // Goal Weight (Success Color) 'rgba(255, 193, 7, 0.6)', // Healthy Min (Warning Color) 'rgba(255, 193, 7, 0.6)' // Healthy Max (Warning Color) ], borderColor: [ 'rgba(0, 74, 153, 1)', 'rgba(40, 167, 69, 1)', 'rgba(255, 193, 7, 1)', 'rgba(255, 193, 7, 1)' ], borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, // Allows custom height/width scales: { y: { beginAtZero: true, max: maxY, // Set max based on data title: { display: true, text: 'Weight (lbs)' } }, x: { title: { display: true, text: 'Weight Category' } } }, plugins: { legend: { display: false // Hiding legend as labels are on bars }, title: { display: true, text: 'Weight Comparison', font: { size: 16 } } } } }); } function resetCalculator() { document.getElementById('currentWeight').value = '160'; document.getElementById('heightFeet').value = '5'; document.getElementById('heightInches').value = '6'; document.getElementById('age').value = '35'; document.getElementById('sex').value = 'female'; document.getElementById('activityLevel').value = 'moderate'; // Clear error messages document.getElementById('currentWeightError').textContent = "; document.getElementById('heightError').textContent = "; document.getElementById('ageError').textContent = "; // Trigger calculation with reset values calculateGoalWeight(); } function copyResults() { var currentWeight = document.getElementById('currentWeight').value; var heightFeet = document.getElementById('heightFeet').value; var heightInches = document.getElementById('heightInches').value; var age = document.getElementById('age').value; var sex = document.getElementById('sex').value; var activityLevel = document.getElementById('activityLevel').value; var primaryResultText = document.getElementById('primaryResult').textContent; var bmiResultText = document.getElementById('bmiResult').querySelector('span').textContent; var healthyWeightRangeText = document.getElementById('healthyWeightRange').textContent; var targetBMIText = document.getElementById('targetBMI').textContent; var bmrResultText = document.getElementById('bmrResult').textContent; var tableCurrentWeightText = document.getElementById('tableCurrentWeight').textContent; var tableHeightText = document.getElementById('tableHeight').textContent; var tableCurrentBMIText = document.getElementById('tableCurrentBMI').textContent; var tableGoalWeightText = document.getElementById('tableGoalWeight').textContent; var tableBMRText = document.getElementById('tableBMR').textContent; var copyText = "— Weight Watchers Goal Weight Calculation —\n\n"; copyText += "Inputs:\n"; copyText += "- Current Weight: " + currentWeight + " lbs\n"; copyText += "- Height: " + heightFeet + "ft " + heightInches + "in\n"; copyText += "- Age: " + age + "\n"; copyText += "- Sex: " + sex.charAt(0).toUpperCase() + sex.slice(1) + "\n"; copyText += "- Activity Level: " + activityLevel.charAt(0).toUpperCase() + activityLevel.slice(1) + "\n\n"; copyText += "Results:\n"; copyText += "- Your Goal Weight: " + primaryResultText + "\n"; copyText += "- Your Current BMI: " + bmiResultText + "\n"; copyText += "- Healthy Weight Range: " + healthyWeightRangeText.replace('Your Healthy Weight Range: ', ") + "\n"; copyText += "- Target BMI: " + targetBMIText + "\n"; copyText += "- Estimated BMR: " + bmrResultText + "\n\n"; copyText += "Summary Table:\n"; copyText += "- Current Weight: " + tableCurrentWeightText + "\n"; copyText += "- Height: " + tableHeightText + "\n"; copyText += "- Current BMI: " + tableCurrentBMIText + "\n"; copyText += "- Goal Weight: " + tableGoalWeightText + "\n"; copyText += "- Estimated BMR: " + tableBMRText + "\n"; navigator.clipboard.writeText(copyText).then(function() { var status = document.getElementById('copyStatus'); status.style.display = 'block'; setTimeout(function() { status.style.display = 'none'; }, 3000); }, function(err) { console.error('Could not copy text: ', err); }); } // Initial calculation on page load document.addEventListener('DOMContentLoaded', function() { // Check if Chart.js is loaded before trying to use it if (typeof Chart === 'undefined') { console.error("Chart.js is not loaded. Please include the Chart.js library."); // Optionally, disable the chart or show a message document.getElementById('weightRangeChart').style.display = 'none'; return; } // Set default values and calculate resetCalculator(); });

Leave a Comment