Calculating Weight Watchers Pro Points Allowance

Weight Watchers ProPoints Allowance Calculator – Calculate Your Daily Points 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: #fff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); display: flex; flex-direction: column; } .header { background-color: #004a99; color: #fff; padding: 20px; text-align: center; border-radius: 8px 8px 0 0; margin: -20px -20px 20px -20px; } .header h1 { margin: 0; font-size: 2.2em; font-weight: 600; } .calculator-section { padding: 20px; border-bottom: 1px solid #eee; } .calculator-section:last-child { border-bottom: none; } h2 { color: #004a99; margin-top: 0; font-size: 1.8em; border-bottom: 2px solid #004a99; padding-bottom: 5px; } .input-group { margin-bottom: 20px; display: flex; flex-direction: column; } .input-group label { display: block; margin-bottom: 8px; font-weight: 500; color: #555; } .input-group input[type="number"], .input-group select { width: 100%; padding: 12px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; font-size: 1em; } .input-group input[type="number"]:focus, .input-group select:focus { border-color: #004a99; outline: none; box-shadow: 0 0 0 3px rgba(0, 74, 153, 0.2); } .input-group .helper-text { font-size: 0.85em; color: #777; margin-top: 5px; } .error-message { color: #dc3545; font-size: 0.85em; margin-top: 5px; display: none; /* Hidden by default */ } .button-group { margin-top: 25px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; } button { padding: 12px 25px; border: none; border-radius: 5px; cursor: pointer; font-size: 1em; font-weight: 500; transition: background-color 0.3s ease; } .btn-primary { background-color: #004a99; color: #fff; } .btn-primary:hover { background-color: #003a7a; } .btn-secondary { background-color: #6c757d; color: #fff; } .btn-secondary:hover { background-color: #5a6268; } .btn-copy { background-color: #28a745; color: #fff; } .btn-copy:hover { background-color: #218838; } .results-container { background-color: #e9ecef; padding: 20px; border-radius: 4px; margin-top: 25px; text-align: center; } .results-container h3 { margin-top: 0; color: #004a99; font-size: 1.6em; } .main-result { font-size: 2.5em; font-weight: bold; color: #004a99; margin: 15px 0; padding: 15px; background-color: #d4edda; /* Success color tint */ border-radius: 5px; display: inline-block; } .intermediate-results div { margin-bottom: 10px; font-size: 1.1em; } .intermediate-results strong { color: #004a99; min-width: 180px; display: inline-block; } .formula-explanation { font-size: 0.9em; color: #555; margin-top: 15px; text-align: left; } .chart-container { margin-top: 30px; padding: 20px; background-color: #f8f9fa; border-radius: 4px; text-align: center; } canvas { max-width: 100%; height: auto; } .chart-caption { font-size: 0.9em; color: #666; margin-top: 10px; } table { width: 100%; border-collapse: collapse; margin-top: 20px; } th, td { padding: 10px; text-align: left; border: 1px solid #ddd; } th { background-color: #004a99; color: #fff; font-weight: 600; } tr:nth-child(even) { background-color: #f2f2f2; } .article-section { margin-top: 40px; padding: 30px; background-color: #fff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); } .article-section h2 { font-size: 2em; margin-bottom: 20px; color: #004a99; border-bottom: 2px solid #004a99; } .article-section h3 { font-size: 1.5em; color: #004a99; margin-top: 25px; margin-bottom: 15px; } .article-section p, .article-section ul, .article-section ol { margin-bottom: 15px; font-size: 1.05em; } .article-section ul, .article-section ol { padding-left: 25px; } .article-section li { margin-bottom: 8px; } .article-section .faq-question { font-weight: bold; color: #004a99; margin-top: 20px; margin-bottom: 5px; } .article-section .faq-answer { margin-left: 10px; margin-bottom: 10px; } .related-links ul { list-style: none; padding: 0; } .related-links li { margin-bottom: 10px; } .related-links a { color: #004a99; text-decoration: none; font-weight: 500; } .related-links a:hover { text-decoration: underline; } .related-links span { font-size: 0.9em; color: #666; display: block; margin-top: 5px; } .highlight { background-color: #fff3cd; padding: 2px 4px; border-radius: 3px; display: inline-block; } .summary { text-align: center; margin-bottom: 30px; font-size: 1.1em; color: #333; }

Weight Watchers ProPoints Allowance Calculator

Calculate your personalized daily ProPoints allowance based on your individual factors and activity level.

Calculate Your ProPoints Allowance

Enter your age in whole years.
Enter your current 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/sports & physical job) Select your typical weekly activity level.
Male Female Select your gender.
Lose Weight Maintain Weight Gain Weight Select your current weight goal.

Your ProPoints Allowance Summary

Formula Used: The ProPoints allowance is a modified version of Basal Metabolic Rate (BMR) adjusted for activity and weight goals. BMR is calculated using the Mifflin-St Jeor equation. Total Daily Energy Expenditure (TDEE) = BMR * Activity Factor. ProPoints are then adjusted: – Losing: TDEE – 500 calories (approx. 50 ProPoints) – Maintaining: TDEE (approx. 100 ProPoints) – Gaining: TDEE + 250 calories (approx. 25 ProPoints) *Note: These are approximations; Weight Watchers uses specific proprietary formulas for their plans.

Key Assumptions:

Age: years

Weight: kg

Height: cm

Gender:

Activity Level:

Weight Goal:

Daily ProPoints vs. Calorie Needs

Estimated daily ProPoints allowance compared to your calculated Total Daily Energy Expenditure (TDEE).

ProPoints Calculation Breakdown Table

Metric Value
Basal Metabolic Rate (BMR) N/A
Total Daily Energy Expenditure (TDEE) N/A
Daily ProPoints Allowance N/A
Calorie Deficit/Surplus N/A

What is Weight Watchers ProPoints Allowance?

The Weight Watchers ProPoints allowance is a personalized daily budget of points assigned to members following specific Weight Watchers programs. These points are designed to guide users towards healthier food choices by assigning a value to foods based on their nutritional content, primarily focusing on calories, saturated fat, sugar, and protein. The core idea is to encourage consumption of nutrient-dense foods that are lower in points and limit those that are higher. Understanding and calculating your ProPoints allowance is the first step to effectively managing your weight loss journey with Weight Watchers.

This system replaced previous point systems and was developed to help members develop sustainable eating habits. It moves beyond simple calorie counting by factoring in other crucial nutritional elements that contribute to overall health and satiety. For example, protein-rich foods, which help you feel fuller for longer, typically have fewer points than foods high in sugar and fat but low in protein, even if their calorie counts are similar. This encourages a more balanced and satisfying approach to eating.

Who Should Use It?

Anyone enrolled in a Weight Watchers program that utilizes the ProPoints system should understand their allowance. This includes individuals looking to:

  • Lose weight in a structured and supported manner.
  • Develop healthier eating habits and a better relationship with food.
  • Understand the nutritional value of different foods in a simplified way.
  • Track their food intake effectively to stay within a healthy calorie and nutrient range.

Common Misconceptions

Several common misconceptions surround the ProPoints system:

  • "All low-point foods are 'free' or 'healthy'." While lower-point foods are encouraged, moderation is still key. Overconsumption of even low-point foods can lead to exceeding your daily allowance. "Healthy" also considers micronutrients not explicitly factored into ProPoints calculation.
  • "ProPoints are just calories." This is incorrect. While calories are a significant factor, ProPoints also account for saturated fat, sugar, and protein, offering a more nuanced approach to nutrition.
  • "The allowance never changes." Your ProPoints allowance can be adjusted based on weight loss, changes in activity level, or even shifts in Weight Watchers' program guidelines.
  • "You must eat 'Weight Watchers' branded foods." The system is designed to be applied to all foods, allowing flexibility and integration into everyday life, not just specific brand products.

Weight Watchers ProPoints Allowance Formula and Mathematical Explanation

The calculation of a Weight Watchers ProPoints allowance is based on estimating your body's energy needs and then adjusting them according to your weight goal. While the exact proprietary algorithm used by Weight Watchers may have subtle differences or additional factors, a common and widely accepted method for estimating this involves calculating your Basal Metabolic Rate (BMR) and then your Total Daily Energy Expenditure (TDEE).

Step-by-Step Derivation:

  1. Calculate Basal Metabolic Rate (BMR): This is the number of calories your body burns at rest to maintain basic functions like breathing, circulation, and cell production. The Mifflin-St Jeor equation is often considered the most accurate for this:
    • 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 accounts for your BMR plus the calories burned through physical activity. It's calculated by multiplying your BMR by an activity factor: TDEE = BMR × Activity Factor The activity factors are generally:
    • Sedentary: 0.2
    • Lightly Active: 0.375
    • Moderately Active: 0.55
    • Very Active: 0.725
    • Extra Active: 0.9
  3. Determine Caloric Goal: Based on your weight goal, you adjust your TDEE:
    • Lose Weight: A deficit of approximately 500 calories per day is recommended for about 1 pound (0.45 kg) of weight loss per week.
    • Maintain Weight: Your caloric goal is equal to your TDEE.
    • Gain Weight: A surplus of approximately 250 calories per day is often recommended for gradual weight gain.
  4. Convert Caloric Goal to ProPoints: Weight Watchers assigns a conversion rate. A common approximation is that 1 pound (0.45 kg) of fat is roughly equivalent to 3500 calories. Therefore:
    • For losing ~1 lb/week (500 calorie deficit daily): ~50 ProPoints daily.
    • For maintaining weight: ~100 ProPoints daily (this can vary significantly based on individual TDEE).
    • For gaining ~0.5 lb/week (250 calorie surplus daily): ~25 ProPoints daily.
    *Note: This conversion is a simplification. Weight Watchers' actual ProPoints formula is proprietary and might weight macronutrients differently than this basic calorie conversion implies. The calculator provides an estimate based on these principles.*

Variable Explanations:

The key variables used in calculating your estimated ProPoints allowance are:

Variable Meaning Unit Typical Range / Values
Age Your age in years. Metabolism tends to slow with age. Years 0+ (realistic adult ranges vary)
Weight Your current body weight. Higher weight generally means higher BMR. Kilograms (kg) 0.1+ kg
Height Your body height. Taller individuals generally have a higher BMR. Centimeters (cm) 1+ cm
Gender Biological sex, affecting muscle mass and hormonal differences. Men typically have higher BMRs. Categorical Male, Female
Activity Level Your average weekly physical activity intensity and frequency. Factor 0.2 to 0.9
Weight Goal Your desired outcome (lose, maintain, gain weight). Categorical Lose, Maintain, Gain
BMR Calories burned at rest. Calories/day Varies greatly based on inputs
TDEE Total calories burned daily, including activity. Calories/day Varies greatly based on inputs
Calorie Adjustment Daily calorie target based on weight goal. Calories/day +/- (e.g., -500 for loss, +250 for gain)
ProPoints Allowance Estimated daily points budget. Points/day Varies greatly based on inputs

Practical Examples (Real-World Use Cases)

Example 1: Sarah, Aiming to Lose Weight

Sarah is a 35-year-old female, 170 cm tall, weighing 75 kg. She works an office job but tries to walk for 30 minutes, 3-4 times a week. Her goal is to lose weight.

  • Inputs: Age: 35, Weight: 75 kg, Height: 170 cm, Gender: Female, Activity Level: Lightly Active (0.375), Goal: Lose Weight.
  • Calculation Steps:
    • BMR (Female): (10 * 75) + (6.25 * 170) – (5 * 35) – 161 = 750 + 1062.5 – 175 – 161 = 1476.5 calories
    • TDEE: 1476.5 * 0.375 = 553.7 calories (Note: This activity factor seems too low, likely a typo in the common factors. Using the calculator's typical values for Lightly Active is ~1.375 multiplier on BMR, not 0.375. Let's recalculate using standard multipliers: TDEE = BMR * (1 + Activity_Factor_as_decimal)).
    • Recalculating TDEE with standard interpretation of activity factors: Let's assume a common multiplier approach where the factor is added to 1 (e.g., Sedentary 1.2, Lightly Active 1.375 etc.) or directly applied. For this example, let's use the calculator's internal logic which uses direct multipliers: If Activity Level = 0.375 (Lightly Active Factor provided in calculator): TDEE = 1476.5 * 1.375 (This factor is more typical for lightly active) = ~2020 calories
    • Calorie Adjustment for Loss: 2020 – 500 = 1520 calories
    • Estimated ProPoints Allowance for Loss: Based on ~500 calorie deficit, Sarah might aim for around 50 ProPoints. (The calculator will provide a more precise estimate based on its internal mapping).
  • Calculator Output (Estimated):
    • BMR: ~1477 kcal
    • TDEE: ~2020 kcal
    • Points Adjustment (for Loss): ~50 ProPoints
    • Main Result: Daily ProPoints Allowance: ~50 ProPoints
  • Interpretation: Sarah's estimated daily ProPoints allowance is around 50 points. This budget aims to create a calorie deficit, helping her lose approximately 0.5-1 kg per week. She should focus on nutrient-dense, lower-point foods to stay within this budget while feeling satisfied.

Example 2: Mark, Aiming to Maintain Weight

Mark is a 45-year-old male, 180 cm tall, weighing 85 kg. He exercises moderately 4-5 times a week and has a moderately active job. His goal is to maintain his current weight.

  • Inputs: Age: 45, Weight: 85 kg, Height: 180 cm, Gender: Male, Activity Level: Moderately Active (0.55), Goal: Maintain Weight.
  • Calculation Steps:
    • BMR (Male): (10 * 85) + (6.25 * 180) – (5 * 45) + 5 = 850 + 1125 – 225 + 5 = 1755 calories
    • TDEE (Moderately Active Factor 0.55, interpreted as multiplier): 1755 * 1.55 (typical multiplier for moderately active) = ~2720 calories
    • Calorie Goal for Maintenance: 2720 calories (TDEE)
    • Estimated ProPoints Allowance for Maintenance: Approximated as ~100 ProPoints (this is a standard baseline provided by WW, adjusted based on TDEE).
  • Calculator Output (Estimated):
    • BMR: ~1755 kcal
    • TDEE: ~2720 kcal
    • Points Adjustment (for Maintenance): ~100 ProPoints
    • Main Result: Daily ProPoints Allowance: ~100 ProPoints
  • Interpretation: Mark's estimated daily ProPoints allowance for maintenance is around 100 points. This budget is designed to match his daily energy expenditure, helping him stay at his current weight. He can use this to track his intake and ensure he's consuming roughly the right amount of calories and nutrients for his goals.

How to Use This Weight Watchers ProPoints Calculator

Our Weight Watchers ProPoints allowance calculator is designed for simplicity and accuracy, providing you with an estimated daily points budget. Follow these steps:

  1. Input Your Basic Information:
    • Age: Enter your current age in years.
    • Weight: Input your current weight in kilograms (kg).
    • Height: Enter your height in centimeters (cm).
    • Gender: Select 'Male' or 'Female' from the dropdown.
  2. Select Your Activity Level: Choose the option that best describes your typical weekly physical activity. Be honest, as this significantly impacts your calorie needs.
  3. State Your Weight Goal: Select whether you aim to 'Lose Weight', 'Maintain Weight', or 'Gain Weight'.
  4. Click 'Calculate ProPoints': Once all fields are filled, press the button. The calculator will process your inputs instantly.

How to Read Results:

After clicking 'Calculate ProPoints', you'll see:

  • Main Highlighted Result: This is your estimated daily ProPoints allowance.
  • Intermediate Values:
    • BMR (Basal Metabolic Rate): Your body's calorie needs at complete rest.
    • TDEE (Total Daily Energy Expenditure): Your estimated total daily calorie burn, including activity.
    • Points Adjustment: Indicates the approximate calorie deficit or surplus translated into points for your goal.
  • Formula Explanation: A brief overview of the calculation method used.
  • Key Assumptions: A summary of the data you entered.
  • Chart: A visual representation comparing your ProPoints allowance to your TDEE.
  • Table: A detailed breakdown of the BMR, TDEE, ProPoints, and calorie adjustment.

Decision-Making Guidance:

Use this calculator as a starting point. Your calculated ProPoints allowance provides a guideline:

  • If Losing Weight: Your allowance will be lower, aiming for a calorie deficit. Focus on lower-point, nutrient-dense foods.
  • If Maintaining Weight: Your allowance should align with your TDEE, helping you stay at your current weight.
  • If Gaining Weight: Your allowance will be higher, aiming for a calorie surplus.

Remember, this is an estimate. Weight Watchers programs often include additional weekly points and specific guidance. Always refer to your official Weight Watchers materials for the most accurate plan details.

Key Factors That Affect Weight Watchers ProPoints Results

While our calculator provides a solid estimate, several factors can influence your actual ProPoints allowance and weight management success. Understanding these can help you adjust your approach:

  1. Metabolic Rate Variations: Even with the Mifflin-St Jeor equation, individual metabolisms vary. Factors like genetics, muscle mass percentage (not directly calculated here), and hormonal health can influence how many calories your body burns at rest (BMR). A higher muscle mass generally leads to a higher BMR.
  2. Accuracy of Activity Level Input: This is often the most subjective input. Accurately assessing your daily movement, exercise intensity, and frequency is crucial. Overestimating your activity can lead to a higher TDEE and potentially a less effective calorie deficit for weight loss.
  3. Body Composition: The calculator uses total weight. However, body composition (ratio of fat mass to lean mass) significantly impacts metabolism. Individuals with higher lean mass (muscle) burn more calories at rest than those with higher fat mass, even at the same total weight.
  4. Age and Hormonal Changes: Metabolism naturally tends to decrease slightly with age. Hormonal fluctuations (e.g., during menopause, or due to thyroid issues) can also affect metabolic rate and weight management, which are not fully captured by basic formulas.
  5. Nutritional Quality vs. Points: While ProPoints considers protein, saturated fat, and sugar, it doesn't account for all micronutrients (vitamins, minerals) or fiber. Choosing foods solely based on low points without considering overall nutritional balance might not be optimal for long-term health.
  6. Digestion and Thermic Effect of Food (TEF): Different macronutrients have different TEFs (the calories burned during digestion). Protein has a higher TEF than carbohydrates or fats. While factored into BMR/TDEE conceptually, individual digestive efficiency can vary slightly.
  7. Sleep and Stress: Chronic stress and poor sleep can disrupt hormones like cortisol, potentially affecting appetite, cravings, and fat storage, indirectly influencing weight management even if your ProPoints calculation remains the same.
  8. Water Retention: Fluctuations in water weight due to sodium intake, hydration levels, or hormonal cycles can mask actual fat loss or gain on the scale, making it seem like your ProPoints allowance isn't working as expected day-to-day.

Frequently Asked Questions (FAQ)

Q1: How accurate is the ProPoints calculator estimate?

This calculator provides an *estimate* based on widely accepted metabolic formulas (Mifflin-St Jeor) and standard activity multipliers. Weight Watchers uses its own proprietary algorithm which may incorporate additional proprietary factors. It's a good starting point, but individual results may vary.

Q2: Can I eat unlimited 'Zero-Point' foods?

While Zero-Point foods are a cornerstone of the Weight Watchers plan and don't count towards your daily allowance, it's still important to eat them mindfully. Overeating even Zero-Point foods can lead to stomach discomfort and may not support overall health goals. Focus on balanced portions and listen to your body's hunger and fullness cues.

Q3: What if my weight goal is different from the calculator's suggested points?

The calculator provides a points range based on typical recommendations (e.g., ~50 points for loss, ~100 for maintenance). Your official Weight Watchers plan might offer a slightly different starting point or weekly adjustments. If you have specific medical conditions or dietary needs, consult your doctor or a registered dietitian.

Q4: Does exercise give me "extra" ProPoints?

In many Weight Watchers programs, exercise earns you *additional* "Activity Points" or "FitPoints" that can be used to supplement your daily allowance, especially if you are trying to lose weight. This calculator estimates your *base* daily allowance based on your activity level factor, not the points earned from specific workouts.

Q5: How often should I update my ProPoints allowance calculation?

It's advisable to recalculate your allowance whenever significant changes occur, such as:

  • Reaching a new weight milestone (e.g., losing 5-10 kg).
  • A substantial change in your activity level (starting a new fitness routine or changing jobs).
  • Significant changes in age (e.g., entering a new decade).

Q6: Can I use this calculator if I'm not currently on a Weight Watchers plan?

Yes, this calculator estimates a personalized daily points budget based on general weight management principles. While it mimics aspects of the WW ProPoints system, it's not a substitute for an official Weight Watchers program, which includes support, community, and potentially other plan-specific features.

Q7: Are there foods that are not well-represented by the ProPoints system?

The ProPoints system is designed to be comprehensive, but like any system, it has limitations. Highly processed foods may sometimes have lower point values than expected relative to their nutritional impact, while some healthy, whole foods rich in beneficial fats or complex carbs might seem higher in points. The emphasis remains on whole, unprocessed foods whenever possible.

Q8: What is the difference between ProPoints and SmartPoints?

Weight Watchers has evolved its points systems over time. ProPoints was an earlier iteration. SmartPoints (and later, the current Points system) refined the formula, often placing a stronger emphasis on sugar and protein, while potentially de-emphasizing fat slightly compared to ProPoints. This calculator is based on the principles that informed ProPoints calculation, which is still relevant for understanding personalized nutrition budgeting.

Related Tools and Internal Resources

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Disclaimer: This calculator provides estimates for informational purposes only. It is not a substitute for professional medical advice or a Weight Watchers plan. Consult with a healthcare provider or a Weight Watchers coach for personalized guidance.

var canvas = document.getElementById("proPointsChart"); var ctx = canvas.getContext("2d"); var proPointsChart = null; // Variable to hold the chart instance function calculateBmr(weightKg, heightCm, age, gender) { if (gender === 'male') { return (10 * weightKg) + (6.25 * heightCm) – (5 * age) + 5; } else { // female return (10 * weightKg) + (6.25 * heightCm) – (5 * age) – 161; } } function calculateTdee(bmr, activityFactor) { // Standard interpretation of activity factors often involves multiplying BMR // by a factor that represents lifestyle. The values provided (0.2 to 0.9) seem // more like additions to a base multiplier of 1 for sedentary, or are directly // applied in some contexts. Let's use a common interpretation where these numbers // are multipliers on BMR, though typically they are higher. // Using the calculator's implicit logic: // Sedentary ~ 1.2, Lightly Active ~ 1.375, Moderately Active ~ 1.55, Very Active ~ 1.725, Extra Active ~ 1.9 // The provided options map like this: var effectiveActivityMultiplier; var activityLevelValue = parseFloat(document.getElementById("activityLevel").value); if (activityLevelValue === 0.2) effectiveActivityMultiplier = 1.2; // Sedentary else if (activityLevelValue === 0.375) effectiveActivityMultiplier = 1.375; // Lightly Active else if (activityLevelValue === 0.55) effectiveActivityMultiplier = 1.55; // Moderately Active else if (activityLevelValue === 0.725) effectiveActivityMultiplier = 1.725; // Very Active else if (activityLevelValue === 0.9) effectiveActivityMultiplier = 1.9; // Extra Active else effectiveActivityMultiplier = 1.375; // Default to lightly active return bmr * effectiveActivityMultiplier; } function calculateProPoints() { var age = parseFloat(document.getElementById("age").value); var weightKg = parseFloat(document.getElementById("weightKg").value); var heightCm = parseFloat(document.getElementById("heightCm").value); var gender = document.getElementById("gender").value; var activityLevel = document.getElementById("activityLevel").value; var goal = document.getElementById("goal").value; // Reset error messages document.getElementById("ageError").style.display = 'none'; document.getElementById("weightKgError").style.display = 'none'; document.getElementById("heightCmError").style.display = 'none'; var isValid = true; if (isNaN(age) || age <= 0) { document.getElementById("ageError").textContent = "Please enter a valid age."; document.getElementById("ageError").style.display = 'block'; isValid = false; } if (isNaN(weightKg) || weightKg <= 0) { document.getElementById("weightKgError").textContent = "Please enter a valid weight in kg."; document.getElementById("weightKgError").style.display = 'block'; isValid = false; } if (isNaN(heightCm) || heightCm <= 0) { document.getElementById("heightCmError").textContent = "Please enter a valid height in cm."; document.getElementById("heightCmError").style.display = 'block'; isValid = false; } if (!isValid) { document.getElementById("resultsContainer").style.display = 'none'; return; } var bmr = calculateBmr(weightKg, heightCm, age, gender); var tdee = calculateTdee(bmr, parseFloat(activityLevel)); var calorieAdjustment = 0; var pointsAdjustmentValue = 0; var mainProPoints = 0; var caloriePerPoint = 35; // Approximate calories per point for deficit/surplus calculation if (goal === 'lose') { calorieAdjustment = -500; // Aim for ~1 lb loss per week pointsAdjustmentValue = Math.round(calorieAdjustment / caloriePerPoint); mainProPoints = Math.round(tdee / caloriePerPoint) + pointsAdjustmentValue; // Estimate based on TDEE / caloriePerPoint + adjustment if (mainProPoints < 30) mainProPoints = 30; // Minimum points often around 30 } else if (goal === 'maintain') { calorieAdjustment = 0; pointsAdjustmentValue = 0; mainProPoints = Math.round(tdee / caloriePerPoint) ; // Estimate maintenance points if (mainProPoints < 70) mainProPoints = 70; // Typical maintenance range starts higher } else { // gain calorieAdjustment = 250; // Aim for ~0.5 lb gain per week pointsAdjustmentValue = Math.round(calorieAdjustment / caloriePerPoint); mainProPoints = Math.round(tdee / caloriePerPoint) + pointsAdjustmentValue; // Estimate based on TDEE / caloriePerPoint + adjustment if (mainProPoints 70) mainProPoints = 70; // Cap for strong deficit if (goal === 'maintain' && mainProPoints > 120) mainProPoints = 120; // Cap for high TDEE maintenance if (goal === 'gain' && mainProPoints > 140) mainProPoints = 140; // Cap for high TDEE gain document.getElementById("mainResult").textContent = mainProPoints + " ProPoints"; document.getElementById("bmrResult").innerHTML = "BMR: " + bmr.toFixed(0) + " kcal"; document.getElementById("tdeeResult").innerHTML = "TDEE: " + tdee.toFixed(0) + " kcal"; document.getElementById("pointsAdjustment").innerHTML = "Goal Adjustment: " + calorieAdjustment + " kcal (" + pointsAdjustmentValue + " ProPoints)"; document.getElementById("tableBmr").textContent = bmr.toFixed(0) + " kcal"; document.getElementById("tableTdee").textContent = tdee.toFixed(0) + " kcal"; document.getElementById("tableProPoints").textContent = mainProPoints + " ProPoints"; document.getElementById("tableCalorieAdjustment").textContent = calorieAdjustment + " kcal"; document.getElementById("assumptionAge").textContent = age; document.getElementById("assumptionWeight").textContent = weightKg; document.getElementById("assumptionHeight").textContent = heightCm; document.getElementById("assumptionGender").textContent = gender.charAt(0).toUpperCase() + gender.slice(1); document.getElementById("assumptionActivity").textContent = document.getElementById("activityLevel").options[document.getElementById("activityLevel").selectedIndex].text; document.getElementById("assumptionGoal").textContent = goal.charAt(0).toUpperCase() + goal.slice(1); document.getElementById("resultsContainer").style.display = 'block'; updateChart(tdee, mainProPoints, calorieAdjustment); } function updateChart(tdee, proPoints, calorieAdjustment) { if (proPointsChart) { proPointsChart.destroy(); // Destroy previous chart instance } var chartData = { labels: ['Estimated Daily Needs', 'Your ProPoints Allowance'], datasets: [{ label: 'Calories (kcal)', data: [tdee, tdee + calorieAdjustment], // Show TDEE and the target calorie intake backgroundColor: 'rgba(0, 74, 153, 0.6)', // Primary color tint borderColor: 'rgba(0, 74, 153, 1)', borderWidth: 1 }, { label: 'ProPoints (Approx. Conversion)', data: [null, proPoints], // Only show ProPoints for the allowance, null for TDEE backgroundColor: 'rgba(40, 167, 69, 0.6)', // Success color tint borderColor: 'rgba(40, 167, 69, 1)', borderWidth: 1, type: 'bar' // Use bar for ProPoints to distinguish }] }; var chartOptions = { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Energy (kcal) / Points' } } }, plugins: { tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || "; if (label) { label += ': '; } if (context.parsed.y !== null) { label += context.parsed.y + (context.dataset.label.includes('ProPoints') ? ' Points' : ' kcal'); } return label; } } } } }; // Create new chart instance proPointsChart = new Chart(ctx, { type: 'line', // Base type is line for TDEE data: chartData, options: chartOptions }); } function resetForm() { document.getElementById("age").value = 30; document.getElementById("weightKg").value = 70; document.getElementById("heightCm").value = 165; document.getElementById("gender").value = "female"; document.getElementById("activityLevel").value = "0.375"; // Lightly Active document.getElementById("goal").value = "lose"; // Reset errors document.getElementById("ageError").style.display = 'none'; document.getElementById("weightKgError").style.display = 'none'; document.getElementById("heightCmError").style.display = 'none'; document.getElementById("resultsContainer").style.display = 'none'; if (proPointsChart) { proPointsChart.destroy(); proPointsChart = null; } } function copyResults() { var mainResultEl = document.getElementById("mainResult"); var bmrResultEl = document.getElementById("bmrResult"); var tdeeResultEl = document.getElementById("tdeeResult"); var pointsAdjustmentEl = document.getElementById("pointsAdjustment"); var assumptionAgeEl = document.getElementById("assumptionAge"); var assumptionWeightEl = document.getElementById("assumptionWeight"); var assumptionHeightEl = document.getElementById("assumptionHeight"); var assumptionGenderEl = document.getElementById("assumptionGender"); var assumptionActivityEl = document.getElementById("assumptionActivity"); var assumptionGoalEl = document.getElementById("assumptionGoal"); var resultsText = "— ProPoints Allowance Summary —\n\n"; resultsText += "Main Result: " + mainResultEl.textContent + "\n"; resultsText += bmrResultEl.textContent + "\n"; resultsText += tdeeResultEl.textContent + "\n"; resultsText += pointsAdjustmentEl.textContent + "\n\n"; resultsText += "— Key Assumptions —\n"; resultsText += "Age: " + assumptionAgeEl.textContent + " years\n"; resultsText += "Weight: " + assumptionWeightEl.textContent + " kg\n"; resultsText += "Height: " + assumptionHeightEl.textContent + " cm\n"; resultsText += "Gender: " + assumptionGenderEl.textContent + "\n"; resultsText += "Activity Level: " + assumptionActivityEl.textContent + "\n"; resultsText += "Weight Goal: " + assumptionGoalEl.textContent + "\n"; try { navigator.clipboard.writeText(resultsText).then(function() { alert("Results copied to clipboard!"); }, function(err) { console.error("Could not copy text: ", err); prompt("Copy these results manually:", resultsText); }); } catch (e) { prompt("Copy these results manually:", resultsText); } } // Initialize chart on load if values exist (though typically user triggers calculation first) // Example: Add default values and trigger calculation on load if needed window.onload = function() { resetForm(); // Set sensible defaults // Optional: Automatically calculate with defaults // calculateProPoints(); }; <!– –>

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