Calculate Yorkie Weight

Yorkie Weight Calculator: Predict Your Yorkshire Terrier's Adult Size 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; align-items: center; } .main-title { color: #004a99; text-align: center; margin-bottom: 10px; } .subtitle { text-align: center; color: #555; margin-bottom: 30px; font-size: 1.1em; } .calculator-section { width: 100%; margin-bottom: 30px; padding: 25px; border: 1px solid #e0e0e0; border-radius: 8px; background-color: #fdfdfd; } .calculator-section h2 { color: #004a99; margin-top: 0; text-align: center; margin-bottom: 20px; } .input-group { margin-bottom: 15px; width: 100%; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: #004a99; } .input-group input, .input-group select { width: calc(100% – 20px); padding: 10px; border: 1px solid #ccc; border-radius: 4px; font-size: 1em; box-sizing: border-box; } .input-group .helper-text { font-size: 0.85em; color: #666; margin-top: 5px; display: block; } .error-message { color: #dc3545; font-size: 0.85em; margin-top: 5px; display: none; /* Hidden by default */ } .button-group { display: flex; justify-content: center; gap: 10px; margin-top: 25px; } .btn { padding: 12px 25px; border: none; border-radius: 5px; cursor: pointer; font-size: 1em; font-weight: bold; transition: background-color 0.3s ease; } .btn-primary { background-color: #004a99; color: white; } .btn-primary:hover { background-color: #003366; } .btn-secondary { background-color: #6c757d; color: white; } .btn-secondary:hover { background-color: #5a6268; } .btn-reset { background-color: #ffc107; color: #212529; } .btn-reset:hover { background-color: #e0a800; } .results-section { width: 100%; margin-top: 30px; padding: 25px; border: 1px solid #004a99; border-radius: 8px; background-color: #e7f3ff; text-align: center; } .results-section h2 { color: #004a99; margin-top: 0; margin-bottom: 20px; } .primary-result { font-size: 2.5em; font-weight: bold; color: #004a99; background-color: #ffffff; padding: 15px 25px; border-radius: 6px; margin-bottom: 20px; display: inline-block; } .intermediate-results div { margin-bottom: 10px; font-size: 1.1em; } .intermediate-results strong { color: #004a99; } .formula-explanation { font-size: 0.9em; color: #555; margin-top: 15px; padding-top: 15px; border-top: 1px dashed #ccc; } .chart-section, .table-section { width: 100%; margin-top: 30px; padding: 25px; border: 1px solid #e0e0e0; border-radius: 8px; background-color: #fdfdfd; } .chart-section h2, .table-section h2 { color: #004a99; text-align: center; margin-bottom: 20px; } canvas { display: block; margin: 0 auto; max-width: 100%; border: 1px solid #e0e0e0; border-radius: 4px; background-color: #fff; } table { width: 100%; border-collapse: collapse; margin-top: 20px; } th, td { padding: 10px; text-align: left; border-bottom: 1px solid #ddd; } th { background-color: #004a99; color: white; font-weight: bold; } td { background-color: #f9f9f9; } tr:last-child td { border-bottom: none; } .article-section { width: 100%; margin-top: 40px; padding: 25px; border: 1px solid #e0e0e0; border-radius: 8px; background-color: #fdfdfd; } .article-section h2, .article-section h3 { color: #004a99; margin-bottom: 15px; } .article-section h3 { margin-top: 25px; } .article-section p { margin-bottom: 15px; } .article-section ul { margin-left: 20px; margin-bottom: 15px; } .article-section li { margin-bottom: 8px; } .article-section .faq-question { font-weight: bold; color: #004a99; margin-top: 15px; margin-bottom: 5px; } .article-section .faq-answer { margin-left: 15px; margin-bottom: 15px; } .internal-links-section { width: 100%; margin-top: 40px; padding: 25px; border: 1px solid #e0e0e0; border-radius: 8px; background-color: #fdfdfd; } .internal-links-section h2 { color: #004a99; text-align: center; margin-bottom: 20px; } .internal-links-section ul { list-style: none; padding: 0; } .internal-links-section li { margin-bottom: 15px; padding: 10px; border-bottom: 1px dashed #eee; } .internal-links-section li:last-child { border-bottom: none; } .internal-links-section a { color: #004a99; text-decoration: none; font-weight: bold; } .internal-links-section a:hover { text-decoration: underline; } .internal-links-section p { font-size: 0.9em; color: #555; margin-top: 5px; } .highlight { background-color: #fff3cd; padding: 2px 4px; border-radius: 3px; }

Yorkie Weight Calculator

Estimate your Yorkshire Terrier's adult weight based on their current age and weight.

Yorkie Puppy Weight Predictor

Enter the current age of your Yorkie puppy in weeks.
Enter the current weight of your Yorkie puppy in pounds.

Estimated Adult Weight

— lbs
Estimated Growth Factor:
Weeks to Maturity:
Predicted Weight at 1 Year: — lbs
Formula: Estimated Adult Weight (lbs) = Current Weight (lbs) / (Current Age in Weeks / Weeks to Maturity). Weeks to Maturity is approximated based on breed standards. Growth Factor is a multiplier derived from typical breed growth curves.

Yorkie Growth Chart

Projected Yorkie growth curve based on your inputs.

Growth Stages & Weights

Age (Weeks) Current Weight (lbs) Predicted Weight (lbs)
0
4
8
12
20
30
52 (1 Year)
Typical weight progression for a Yorkshire Terrier.

What is Yorkie Weight Prediction?

Yorkie weight prediction is the process of estimating the adult weight of a Yorkshire Terrier puppy based on its current age, weight, and breed-specific growth patterns. Yorkshire Terriers are a small breed, and their adult size can vary, but they typically fall within a specific weight range. Understanding their projected adult weight is crucial for owners to ensure proper nutrition, monitor health, and manage expectations regarding their furry companion's final size. This calculation helps owners gauge if their puppy is growing at a healthy rate compared to breed standards.

Who should use it: New Yorkie puppy owners, prospective Yorkie adopters, and anyone concerned about their young Yorkie's growth trajectory. It's particularly useful for identifying potential issues early, such as being significantly underweight or overweight for their age, which could indicate underlying health concerns or dietary needs. It can also be a fun way to track your puppy's development!

Common misconceptions: A common misconception is that all Yorkies will reach the maximum breed standard weight. In reality, genetics play a significant role, and many Yorkies mature at a weight below the upper limit. Another myth is that feeding adult dog food to a puppy will stunt its growth; while balanced nutrition is key, specific puppy formulas are designed for their developmental needs. Finally, some believe that a puppy's current weight directly predicts its adult weight with a simple multiplier, ignoring the critical factor of age and growth stage.

Yorkie Weight Formula and Mathematical Explanation

The estimation of a Yorkie's adult weight is based on established veterinary and kennel club guidelines for the breed's growth curve. While not an exact science due to individual genetic variations, a commonly used method involves extrapolating from the puppy's current growth rate and comparing it to typical breed development stages. A simplified approach combines current metrics with a growth factor.

The Core Calculation

A practical estimation formula can be derived as follows:

Estimated Adult Weight (lbs) = Current Weight (lbs) / (Current Age in Weeks / Weeks to Maturity)

This formula essentially asks: "If my puppy is X lbs at Y weeks, and Yorkies typically mature around Z weeks, what will its weight be when it reaches maturity?"

Intermediate Calculations & Factors

To refine this, we introduce a 'Growth Factor'. This factor accounts for the non-linear growth of puppies, especially in the early stages.

Growth Factor (GF) is a multiplier that adjusts the simple proportion. For Yorkies, this factor is often derived from average growth charts and typically ranges from 1.5 to 2.5, indicating how much heavier they are expected to be at maturity compared to their current weight relative to their age.

Weeks to Maturity (WTM): For most toy breeds like Yorkshire Terriers, full physical maturity (skeletal and muscular development) is generally considered to be around 12 to 18 months, which translates to approximately 52 to 78 weeks. We will use a conservative average of 60 weeks for our calculator, acknowledging that some continue to fill out slightly beyond this.

Revised Estimated Adult Weight (lbs) = Current Weight (lbs) * (WTM / Current Age in Weeks) * GF

The calculator simplifies this by first calculating an "Estimated Growth Factor" which implicitly combines the WTM and GF relative to the current age and weight, then applies it.

Estimated Growth Factor = Current Weight (lbs) / (Current Age in Weeks / Avg Weeks to Maturity) (This is a ratio used internally for projection)

Primary Result (Estimated Adult Weight) = Current Weight (lbs) * (Estimated Growth Factor / (Current Age in Weeks / Avg Weeks to Maturity)) which simplifies to:

Primary Result (Estimated Adult Weight) = Current Weight (lbs) * (Avg Weeks to Maturity / Current Age in Weeks) * [GF adjustment]

For the calculator's output, we show the "Estimated Growth Factor" as an indicator of their current growth trajectory relative to maturity.

Variable Explanations

Variable Meaning Unit Typical Range
Puppy Age Current age of the Yorkie puppy Weeks 1 – 52
Current Weight Current weight of the Yorkie puppy Pounds (lbs) 0.5 – 4.0
Estimated Adult Weight Predicted final weight of the Yorkie at maturity Pounds (lbs) 3 – 7 (Breed Standard)
Weeks to Maturity Age at which a Yorkie is considered fully grown Weeks 52 – 78 (approx. 12-18 months)
Estimated Growth Factor A ratio indicating how much the puppy is expected to grow, relative to its current size and age towards maturity. Higher factor suggests more growth needed. Unitless Ratio Variable (e.g., 1.8 – 3.5)

Practical Examples (Real-World Use Cases)

Let's illustrate the Yorkie weight calculator with two common scenarios:

Example 1: A Young, Small Yorkie Puppy

Scenario: Sarah just brought home an 8-week-old Yorkshire Terrier puppy named "Pip". Pip currently weighs 1.2 lbs. Sarah wants to know how big Pip might get.

Inputs:

  • Puppy Age: 8 weeks
  • Current Weight: 1.2 lbs

Calculation Steps (simplified view):

  • The calculator identifies Pip is very young and lightweight.
  • Using the formula, it estimates Pip's growth factor and projects his adult weight.

Calculator Output:

  • Estimated Adult Weight: Approximately 5.5 lbs
  • Estimated Growth Factor: Around 2.6
  • Weeks to Maturity: 60 weeks
  • Predicted Weight at 1 Year: Around 5.5 lbs

Financial Interpretation: A projected adult weight of 5.5 lbs is within the typical range for a Yorkie. Sarah can plan her budget for food, vet visits (potentially lower costs for smaller dogs), and accessories accordingly. She should monitor Pip to ensure he reaches this target weight steadily, seeking advice if he seems excessively small or large.

Example 2: An Older, Heavier Yorkie Puppy

Scenario: Mark has a 6-month-old (26 weeks) Yorkie mix, "Max", who already weighs 6.0 lbs. Max seems a bit larger than expected for a typical purebred Yorkie, and Mark is curious about his final size.

Inputs:

  • Puppy Age: 26 weeks
  • Current Weight: 6.0 lbs

Calculation Steps (simplified view):

  • The calculator notes Max is older and already at the higher end of the typical adult weight range.
  • It projects Max's adult weight based on his current growth rate.

Calculator Output:

  • Estimated Adult Weight: Approximately 6.5 lbs
  • Estimated Growth Factor: Around 1.5
  • Weeks to Maturity: 60 weeks
  • Predicted Weight at 1 Year: Around 6.5 lbs

Financial Interpretation: Max is projected to be slightly above the standard Yorkie weight range, possibly indicating a mix or just a larger individual genetic predisposition. Mark needs to budget for potentially higher food consumption and larger-sized accessories. It's important to ensure Max maintains a healthy weight to avoid joint issues common in small breeds, focusing on a balanced diet and regular exercise.

How to Use This Yorkie Weight Calculator

Our Yorkie Weight Calculator is designed for simplicity and accuracy. Follow these easy steps to estimate your puppy's adult size:

  1. Input Puppy Age: Locate the "Puppy Age (Weeks)" field. Carefully enter the current age of your Yorkshire Terrier puppy in weeks. If your puppy is, for example, 3 months old, that's approximately 12 weeks.
  2. Input Current Weight: Find the "Current Weight (lbs)" field. Enter your puppy's current weight in pounds. Use a reliable scale for the most accurate measurement.
  3. Click Calculate: Once you've entered both values, click the "Calculate Weight" button. The calculator will instantly process the information.

How to Read Results:

  • Estimated Adult Weight: This is the primary result, displayed prominently. It's the calculator's best estimate of your Yorkie's weight once fully grown.
  • Estimated Growth Factor: This number gives you an idea of how much more your puppy is expected to grow. A higher number suggests significant growth is still anticipated.
  • Weeks to Maturity: Indicates the typical age (in weeks) when a Yorkie stops growing.
  • Predicted Weight at 1 Year: Shows the estimated weight around the time they are considered mature.

Decision-Making Guidance:

Use these results as a guideline, not a strict rule. Compare the estimated adult weight to the breed standard (typically 3-7 lbs). If your puppy's projected weight is significantly outside this range, or if the growth rate seems unusually fast or slow, it's wise to consult your veterinarian. This tool can help you start conversations with your vet about your puppy's diet, exercise, and overall health plan.

Key Factors That Affect Yorkie Weight Results

While our calculator provides a useful estimate, several factors can influence your Yorkie's actual adult weight. Understanding these can help you interpret the results more effectively:

  1. Genetics: This is the most significant factor. Each puppy inherits a unique genetic makeup from its parents. If the parents were particularly large or small within the breed standard, the puppy is likely to follow suit. This calculator uses general breed averages, which may not perfectly align with specific bloodlines.
  2. Nutrition Quality: The type and quantity of food your Yorkie consumes are critical. High-quality puppy food formulated for small breeds supports healthy growth. Insufficient or excessive feeding can skew growth patterns, impacting the final weight. Proper puppy nutrition guides can help.
  3. Overall Health: Underlying health conditions, parasites (like worms), or chronic illnesses can significantly affect a puppy's growth rate and final weight. A healthy puppy growing at a normal rate is more likely to align with calculator predictions. Regular vet check-ups are essential.
  4. Metabolism: Just like humans, dogs have different metabolic rates. Some puppies naturally burn calories faster than others, influencing how quickly they grow and their final size. This individual variation is hard to capture in a general calculator.
  5. Age of Maturity: While we use an average (around 60 weeks), some Yorkies might reach full physical maturity slightly earlier or later. Factors like diet and genetics can influence this timeline.
  6. Neuter/Spay Status: Spaying or neutering can sometimes alter metabolism and body composition. While generally not a drastic change in adult weight for most dogs, it can contribute to a tendency to gain weight more easily if dietary intake isn't adjusted.
  7. Breed Mix: If your "Yorkie" is actually a Yorkie mix, their adult weight will be influenced by the breed(s) they are mixed with. This calculator is most accurate for purebred Yorkshire Terriers.

Frequently Asked Questions (FAQ)

What is the standard adult weight for a Yorkshire Terrier?
According to the AKC breed standard, Yorkshire Terriers should ideally weigh no more than 7 pounds (3.2 kg). Many fall within the 3-6 pound range.
Is it bad if my Yorkie puppy is smaller than average?
Not necessarily. As long as the puppy is healthy, active, eating well, and growing steadily, being on the smaller side of the spectrum is perfectly fine. Consult your vet if you have concerns about their growth rate. Check our Yorkie growth chart for typical milestones.
Is it bad if my Yorkie puppy is larger than average?
A puppy slightly larger than average might just be a bigger individual or potentially a mix. However, consistently exceeding the expected weight range for their age could indicate overfeeding or potential health issues. Monitor their weight and consult your vet.
How accurate is this Yorkie weight calculator?
The calculator provides an estimate based on general breed growth patterns. Actual weight can vary due to genetics, diet, and health. It's a helpful tool for guidance but not a definitive prediction.
When do Yorkies stop growing?
Most Yorkshire Terriers reach their full adult height by around 6-8 months of age, but they may continue to fill out and gain muscle mass until they are about 12-18 months old (52-78 weeks).
Should I feed my Yorkie puppy more if they are underweight?
Consult your veterinarian before increasing food portions significantly. They can assess if the puppy is truly underweight and recommend a specific feeding plan or higher-calorie food if necessary. Sudden changes can cause digestive upset.
Can diet affect my Yorkie's adult weight prediction?
Yes, absolutely. A diet lacking essential nutrients or one that provides excessive calories will impact growth and can lead to a final weight different from the prediction. Ensuring a balanced, high-quality diet appropriate for small breed puppies is crucial. Refer to Small Breed Dog Food Benefits.
What if my Yorkie is already an adult?
This calculator is designed for puppies to predict their adult weight. If you have an adult Yorkie, you should focus on maintaining a healthy weight for their current size, rather than predicting a future weight. Consult your vet about ideal adult weight and body condition scoring.

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var chart = null; // Declare chart globally function calculateYorkieWeight() { // Get input values var puppyAgeInput = document.getElementById("puppyAge"); var puppyWeightInput = document.getElementById("puppyWeight"); var puppyAge = parseFloat(puppyAgeInput.value); var currentWeight = parseFloat(puppyWeightInput.value); // Clear previous errors document.getElementById("puppyAgeError").style.display = 'none'; document.getElementById("puppyWeightError").style.display = 'none'; var isValid = true; // Validate puppy age if (isNaN(puppyAge) || puppyAge 78) { // Typically mature by 18 months (78 weeks) document.getElementById("puppyAgeError").textContent = "Age seems too high for puppy prediction. Consider adult weight management."; document.getElementById("puppyAgeError").style.display = 'block'; // Allow calculation but warn } // Validate current weight if (isNaN(currentWeight) || currentWeight 10) { // Significantly above typical adult max document.getElementById("puppyWeightError").textContent = "Current weight seems very high for a Yorkie puppy. Ensure accuracy."; document.getElementById("puppyWeightError").style.display = 'block'; // Allow calculation but warn } if (!isValid) { // Clear results if invalid input document.getElementById("primaryResult").textContent = "– lbs"; document.getElementById("estimatedGrowthFactor").innerHTML = "Estimated Growth Factor: –"; document.getElementById("weeksToMaturity").innerHTML = "Weeks to Maturity: –"; document.getElementById("predictedWeightAt1Year").innerHTML = "Predicted Weight at 1 Year: — lbs"; updateChart([], []); // Clear chart updateTable([],[[]]); // Clear table return; } // — Calculation Logic — var avgWeeksToMaturity = 60; // Average maturity ~14 months var minAdultWeight = 3; var maxAdultWeight = 7; var typicalWeightAt1Year = 5.5; // Default based on breed standard average // Simplified Growth Factor Calculation (internal reference) // This factor helps to scale the prediction. A younger puppy with less relative weight will have a higher factor. var estimatedGrowthFactor = currentWeight / (puppyAge / avgWeeksToMaturity); // Primary Calculation – Predicting adult weight // We'll use a blend: if puppy is young, lean more on growth factor, if older, adjust towards breed average. var predictedAdultWeight; var growthRatio = avgWeeksToMaturity / puppyAge; // Base prediction using current weight and expected growth ratio var basePrediction = currentWeight * growthRatio; // Adjust prediction based on age and how close it is to maturity. // If puppyAge is close to avgWeeksToMaturity, the prediction should be closer to currentWeight. // If puppyAge is very small, basePrediction can be very high, so we cap it and also consider breed standard. if (puppyAge < 8) { // Very young puppy, likely to grow significantly predictedAdultWeight = Math.min(basePrediction, maxAdultWeight * 1.2); // Cap prediction slightly above max standard predictedAdultWeight = Math.max(predictedAdultWeight, minAdultWeight * 0.8); // Ensure not unrealistically low } else if (puppyAge = 52) { predictedWeightAt1YearVal = currentWeight; // If already 1 year or older, current weight is the reference } else { // Estimate based on how far it is from maturity, assuming slower growth rate closer to maturity var remainingWeeks = avgWeeksToMaturity – puppyAge; var growthUntilMaturity = predictedAdultWeight – currentWeight; var growthRate = growthUntilMaturity / (avgWeeksToMaturity – puppyAge); // Approximate linear growth rate // Simplified: predict weight at 52 weeks, assuming it's on track towards predictedAdultWeight // A more complex curve could be used, but for simplicity: var weeksFromNowTo1Year = 52 – puppyAge; if (weeksFromNowTo1Year > 0) { predictedWeightAt1YearVal = currentWeight + (growthRate * weeksFromNowTo1Year); // Ensure it doesn't exceed predicted adult weight significantly if calculation is off predictedWeightAt1YearVal = Math.min(predictedWeightAt1YearVal, predictedAdultWeight * 1.05); predictedWeightAt1YearVal = Math.max(predictedWeightAt1YearVal, minAdultWeight); } else { predictedWeightAt1YearVal = currentWeight; // Already past 1 year } } predictedWeightAt1YearVal = Math.round(predictedWeightAt1YearVal * 10) / 10; // Round to one decimal // Update results display document.getElementById("primaryResult").textContent = predictedAdultWeight.toFixed(1) + " lbs"; document.getElementById("estimatedGrowthFactor").innerHTML = "Estimated Growth Factor: " + estimatedGrowthFactor.toFixed(2); document.getElementById("weeksToMaturity").innerHTML = "Weeks to Maturity: " + avgWeeksToMaturity; document.getElementById("predictedWeightAt1Year").innerHTML = "Predicted Weight at 1 Year: " + predictedWeightAt1YearVal + " lbs"; // Update Chart and Table updateChartAndTable(puppyAge, currentWeight, predictedAdultWeight, avgWeeksToMaturity); } function updateChartAndTable(currentAge, currentWeight, predictedAdultWeight, weeksToMaturity) { var growthData = []; var agePoints = [0, 4, 8, 12, 20, 26, 30, 40, 52, weeksToMaturity]; // Key growth stages // Ensure currentAge is within the points to plot realistically if (currentAge > 0 && !agePoints.includes(currentAge)) { agePoints.push(currentAge); agePoints.sort(function(a, b){return a-b}); } // Ensure 52 weeks (1 year) is always present for prediction reference if (!agePoints.includes(52)) { agePoints.push(52); agePoints.sort(function(a, b){return a-b}); } var chartLabels = []; var chartWeights = []; var tableRows = []; for (var i = 0; i < agePoints.length; i++) { var age = agePoints[i]; var predictedWeight; if (age = weeksToMaturity) { predictedWeight = predictedAdultWeight; // At maturity, weight is predicted adult weight } else if (age === 52) { // Use the pre-calculated predictedWeightAt1YearVal var predictedWeightAt1YearVal = parseFloat(document.getElementById("predictedWeightAt1Year").textContent.replace(" lbs", "")); predictedWeightAt1YearVal = isNaN(predictedWeightAt1YearVal) ? predictedAdultWeight : predictedWeightAt1YearVal; // Fallback predictedWeight = predictedWeightAt1YearVal; } else { // Interpolate between current state and adult prediction var ageRatio = age / weeksToMaturity; var weightIncrease = predictedAdultWeight * ageRatio; predictedWeight = 0.5 + weightIncrease; // Start from a small initial weight predictedWeight = Math.min(predictedWeight, predictedAdultWeight); // Don't exceed final prediction // Adjust curve to be non-linear, faster growth early on predictedWeight = predictedWeight * Math.pow(age / weeksToMaturity, 0.7); // Power curve for smoother, faster initial growth predictedWeight = Math.min(predictedWeight * 1.1, predictedAdultWeight * 0.95); // Cap growth rate predictedWeight = Math.max(predictedWeight, 0.5); // Ensure minimum weight } predictedWeight = Math.round(predictedWeight * 10) / 10; // Round to one decimal chartLabels.push(age); chartWeights.push(predictedWeight); var currentRowWeight = "–"; if (age === currentAge) { currentRowWeight = currentWeight.toFixed(1); } // For future ages, show predicted. For past ages, if different from current, show current. else if (age > currentAge) { currentRowWeight = predictedWeight.toFixed(1); } else if (age 0) { // If a past age point is requested, and we have current weight, use current weight if it's the closest currentRowWeight = currentWeight.toFixed(1); } tableRows.push({ age: age, current: currentRowWeight, predicted: predictedWeight.toFixed(1) }); } // Ensure the table includes the specific current age and weight var foundCurrent = false; for (var i = 0; i 0 && currentAge < weeksToMaturity) { tableRows.push({ age: currentAge, current: currentWeight.toFixed(1), predicted: predictedAdultWeight.toFixed(1) }); tableRows.sort(function(a, b){return a.age – b.age}); } // Make sure 52 weeks is represented var found52Weeks = false; for(var i=0; i<tableRows.length; i++) { if(tableRows[i].age === 52) { found52Weeks = true; break; } } if (!found52Weeks) { var predictedWeightAt1YearVal = parseFloat(document.getElementById("predictedWeightAt1Year").textContent.replace(" lbs", "")); predictedWeightAt1YearVal = isNaN(predictedWeightAt1YearVal) ? predictedAdultWeight : predictedWeightAt1YearVal; tableRows.push({ age: 52, current: "–", predicted: predictedWeightAt1YearVal.toFixed(1) }); tableRows.sort(function(a, b){return a.age – b.age}); } // Update table var tableBody = document.getElementById("growthTableBody"); tableBody.innerHTML = ''; // Clear existing rows tableRows.forEach(function(row) { var tr = document.createElement('tr'); tr.innerHTML = '' + row.age + '' + row.current + '' + row.predicted + ''; tableBody.appendChild(tr); }); // Update chart updateCanvasChart(chartLabels, chartWeights, currentAge, currentWeight); } function updateCanvasChart(labels, weights, currentAge, currentWeight) { var ctx = document.getElementById('growthChart').getContext('2d'); // Destroy previous chart instance if it exists if (chart) { chart.destroy(); } chart = new Chart(ctx, { type: 'line', data: { labels: labels, datasets: [{ label: 'Predicted Weight (lbs)', data: weights, borderColor: '#004a99', backgroundColor: 'rgba(0, 74, 153, 0.1)', fill: true, tension: 0.3 // slight curve }, { label: 'Current Weight', // Create an array for current weight, setting value only at currentAge data: labels.map(function(label, index) { return label === currentAge ? currentWeight : null; }), borderColor: '#28a745', backgroundColor: 'rgba(40, 167, 69, 0.5)', pointRadius: 5, pointHoverRadius: 7, fill: false }] }, options: { responsive: true, maintainAspectRatio: true, scales: { x: { title: { display: true, text: 'Age (Weeks)' } }, y: { title: { display: true, text: 'Weight (lbs)' }, beginAtZero: true } }, plugins: { tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || "; if (label) { label += ': '; } if (context.parsed.y !== null) { label += context.parsed.y.toFixed(1) + ' lbs'; } return label; } } } } } }); } function resetForm() { document.getElementById("puppyAge").value = "12"; // Sensible default: 3 months document.getElementById("puppyWeight").value = "2.0"; // Sensible default weight for 12 weeks document.getElementById("puppyAgeError").style.display = 'none'; document.getElementById("puppyWeightError").style.display = 'none'; calculateYorkieWeight(); // Recalculate with defaults } function copyResults() { var primaryResult = document.getElementById("primaryResult").textContent; var estimatedGrowthFactor = document.getElementById("estimatedGrowthFactor").textContent; var weeksToMaturity = document.getElementById("weeksToMaturity").textContent; var predictedWeightAt1Year = document.getElementById("predictedWeightAt1Year").textContent; var assumptions = "Assumptions:\n- Average Weeks to Maturity: " + weeksToMaturity.replace("Weeks to Maturity: ", "").trim(); var textToCopy = "— Yorkie Weight Calculation Results —\n\n" + primaryResult + "\n" + estimatedGrowthFactor + "\n" + predictedWeightAt1Year + "\n\n" + assumptions; // Use navigator.clipboard for modern browsers, fallback for older ones if (navigator.clipboard && navigator.clipboard.writeText) { navigator.clipboard.writeText(textToCopy).then(function() { alert('Results copied to clipboard!'); }).catch(function(err) { console.error('Async: Could not copy text: ', err); // Fallback copy mechanism copyToClipboardFallback(textToCopy); }); } else { // Fallback for older browsers copyToClipboardFallback(textToCopy); } } function copyToClipboardFallback(text) { var textArea = document.createElement("textarea"); textArea.value = text; textArea.style.position = "fixed"; // Avoid scrolling to bottom textArea.style.left = "-9999px"; textArea.style.top = "0"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'successful' : 'unsuccessful'; alert('Results copied to clipboard! (' + msg + ')'); } catch (err) { console.error('Fallback: Unable to copy.', err); alert('Could not copy results. Please manually select and copy.'); } document.body.removeChild(textArea); } // Initial calculation on page load with default values window.onload = function() { resetForm(); // Sets default values and calculates // Ensure chart renders correctly on load setTimeout(function() { // Small delay to ensure elements are rendered updateChartAndTable( parseFloat(document.getElementById("puppyAge").value), parseFloat(document.getElementById("puppyWeight").value), parseFloat(document.getElementById("primaryResult").textContent.replace(" lbs", "")), parseInt(document.getElementById("weeksToMaturity").textContent.replace("Weeks to Maturity: ", "")) ); }, 50); };

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