Estimate your puppy's adult weight based on breed and current age/weight.
Small Breed (e.g., Chihuahua, Yorkie)
Medium Breed (e.g., Beagle, Border Collie)
Large Breed (e.g., Labrador, German Shepherd)
Giant Breed (e.g., Great Dane, Mastiff)
Enter your puppy's current weight in pounds.
Enter your puppy's current age in weeks.
Estimated Full Grown Weight
Estimated Adult Weight:
—
At 6 Months (Approx.):
—
Weight Doubling Factor (Approx.):
—
Breed Multiplier Used:
—
The primary estimation uses a simplified method: doubling the weight at 4-6 months, adjusted by breed size multipliers. Smaller breeds mature faster and have lower multipliers, while larger breeds take longer and have higher multipliers.
Assumptions: Breed type significantly influences growth rate and final size. This is an estimate.
Growth Projection Chart
Projected weight gain of your puppy based on input.
Breed Size Category Guide
Category
Typical Adult Weight Range (lbs)
Growth Maturation (Months)
Small Breed
10-30 lbs
8-12 months
Medium Breed
30-55 lbs
12-15 months
Large Breed
55-90 lbs
15-18 months
Giant Breed
90+ lbs
18-24 months
General guidelines for breed size categories.
What is Puppy Full Grown Weight Calculation?
Calculating a puppy's full grown weight involves estimating the adult size of a dog based on its current age, weight, breed, and sometimes specific physical characteristics. This calculation is crucial for new puppy owners to understand their pet's future needs, including diet, exercise, training, and even veterinary care. It helps in managing expectations and preparing for the responsibilities that come with a larger dog.
Who should use it?
New puppy owners trying to anticipate their dog's size.
Owners of mixed-breed dogs where adult size is less predictable.
Anyone curious about their puppy's growth trajectory.
Prospective owners researching breeds and their adult size implications.
Common misconceptions about calculating a puppy's full grown weight include:
The belief that a puppy will always weigh exactly double its weight at a specific age (e.g., 4 months). This is an oversimplification.
Assuming mixed-breed dogs follow predictable growth patterns; they often don't.
Underestimating the significant variation within breeds, especially larger ones.
Ignoring the role of diet, health, and genetics in determining final size.
Understanding how to calculate a puppy's full grown weight provides valuable insights for responsible pet ownership.
Puppy Full Grown Weight Formula and Mathematical Explanation
There isn't one single, universally perfect formula for calculating a puppy's full grown weight due to the complex factors involved. However, several methods offer reasonable estimates. The method used in this calculator is a common, simplified approach based on breed type and current growth stage.
Method Used: Breed Multiplier and Growth Stage Adjustment
This method leverages established growth patterns for different breed sizes. A common rule of thumb is that many puppies reach about half their adult weight by around 4-6 months of age. We then apply a multiplier based on breed size to estimate the final weight.
Simplified Formula:
Estimated Adult Weight = Current Weight * (Multiplier for Breed Type)
Weight at 6 Months (Approx.):
Weight at 6 Months = Current Weight * (Factor based on current age relative to 6 months)
Variable Explanations:
Current Weight: The puppy's weight in pounds (lbs) at the time of calculation.
Age (Weeks): The puppy's current age in weeks. This helps adjust expectations. Puppies younger than 4 months will have a different projection scaling than those older.
Breed Type: Categorizes the puppy into Small, Medium, Large, or Giant breeds, each with different growth rates and adult weight potentials.
Breed Multiplier: A factor applied to the current weight to estimate adult weight. This multiplier is higher for larger breeds that grow for longer periods.
Weight at 6 Months (Approx.): A key intermediate milestone. Many dogs reach a significant portion of their adult weight by this age.
Weight Doubling Factor: This is an informal way to think about it; if a puppy is relatively young (e.g., 10-16 weeks), doubling its current weight can be a rough indicator of adult weight, especially for medium to large breeds.
The breed multipliers are generalized. For specific breed predictions, consulting breed standards or a veterinarian is recommended. The 'Weight at 6 Months' is calculated by scaling current weight based on the proportion of growth expected by that age, and the 'Weight Doubling Factor' is a simplified approximation often used for younger puppies.
Practical Examples (Real-World Use Cases)
Example 1: Medium Breed Puppy
Scenario: Sarah has a 12-week-old Border Collie puppy named Max that currently weighs 15 lbs. Border Collies are considered medium breeds.
Inputs:
Breed Type: Medium Breed
Current Weight: 15 lbs
Age (Weeks): 12 weeks
Calculation Steps (Simplified Logic):
Breed Multiplier Estimate: For a medium breed, let's use a multiplier of 2.5.
Estimated Adult Weight: 15 lbs * 2.5 = 37.5 lbs.
Weight at 6 Months (Approx.): Since Max is 12 weeks (3 months), he's halfway to 6 months. A rough estimate might be around 25-30 lbs. (The calculator uses a more refined interpolation).
Weight Doubling Factor: For a 12-week-old, doubling might estimate around 30 lbs.
Calculator Output:
Estimated Adult Weight: 38 lbs
At 6 Months (Approx.): 28 lbs
Weight Doubling Factor (Approx.): 2.5x (meaning current weight * 2.5)
Breed Multiplier Used: 2.5
Interpretation: Sarah can expect Max to grow into a dog weighing around 38 lbs. This helps her plan for food quantities and potentially larger bedding or crates as he grows.
Example 2: Large Breed Puppy
Scenario: John adopted a 16-week-old Labrador Retriever puppy, Bella, who weighs 30 lbs. Labs are large breeds.
Inputs:
Breed Type: Large Breed
Current Weight: 30 lbs
Age (Weeks): 16 weeks
Calculation Steps (Simplified Logic):
Breed Multiplier Estimate: For a large breed, a multiplier of 3.0 is often used.
Estimated Adult Weight: 30 lbs * 3.0 = 90 lbs.
Weight at 6 Months (Approx.): At 16 weeks (4 months), Bella is likely past the point where doubling is accurate. She might be around 35-40 lbs at 6 months. (The calculator provides a precise interpolation).
Weight Doubling Factor: While doubling might suggest 60 lbs, this is less reliable for a 16-week-old large breed.
Calculator Output:
Estimated Adult Weight: 88 lbs
At 6 Months (Approx.): 42 lbs
Weight Doubling Factor (Approx.): 2.9x (meaning current weight * 2.9)
Breed Multiplier Used: 2.9
Interpretation: John should prepare for Bella to become a substantial dog, potentially reaching close to 90 lbs. This is vital for understanding training needs, exercise requirements, and potential costs associated with a larger breed.
How to Use This Puppy's Full Grown Weight Calculator
Using our Puppy's Full Grown Weight Calculator is straightforward and designed to give you a quick, useful estimate. Follow these simple steps:
Select Breed Type: Choose the category that best fits your puppy's breed (Small, Medium, Large, or Giant). If you have a mixed breed, try to estimate based on the parents' breeds or the puppy's current physical characteristics (e.g., large paws often indicate a larger adult size).
Enter Current Weight: Accurately weigh your puppy and enter the value in pounds (lbs) into the "Current Weight" field.
Enter Age in Weeks: Input your puppy's current age in weeks. Being precise here helps improve the accuracy of the projection.
Click 'Calculate': Press the 'Calculate' button. The calculator will process your inputs using its underlying formula.
Read the Results: The estimated full grown weight will be displayed prominently. You'll also see intermediate projections like the estimated weight at 6 months, the approximate doubling factor, and the specific breed multiplier used for your calculation.
How to read results: The "Estimated Adult Weight" is your primary figure. The intermediate results give you milestones to track your puppy's progress. For instance, seeing if your puppy is on track to reach the projected weight at 6 months is a good indicator.
Decision-making guidance: Use these estimates to plan for your puppy's future. Knowing a potential adult weight helps in choosing appropriate food portions, determining the right size of dog beds, crates, and collars, and understanding the exercise levels your dog will eventually need. If the estimated weight seems significantly different from breed standards, consult your veterinarian.
Key Factors That Affect Puppy's Full Grown Weight
While calculators provide valuable estimates, actual adult weight can vary. Several factors influence how big a puppy will ultimately become:
Genetics & Breed: This is the most significant factor. Purebred dogs have predictable size ranges defined by breed standards. Mixed breeds inherit a combination of genes, making their adult size harder to predict but often falling within the range of their contributing breeds.
Nutrition: Proper nutrition is vital for healthy growth. An unbalanced or insufficient diet can stunt growth, while overfeeding, especially in large breeds, can lead to obesity and skeletal issues, impacting their final healthy weight and structure.
Age & Growth Rate: Puppies grow at different rates. Smaller breeds mature faster, reaching adult size earlier than large or giant breeds, which can continue growing for 18-24 months. The calculator uses age to refine its estimates.
Sex: Male dogs are often slightly larger and heavier than females of the same breed, though there can be overlap.
Health & Medical Conditions: Certain health issues, genetic conditions, or illnesses can affect a puppy's growth rate and final size. Spaying or neutering can also have a minor impact on growth plate closure and final size.
Overall Condition: A puppy that is underweight for its age might catch up later with proper care, while an overweight puppy may be headed towards adult obesity. Body condition scoring is more important than just weight.
Environment and Exercise: While less impactful than genetics or nutrition, appropriate exercise supports healthy muscle development and prevents conditions like hip dysplasia, indirectly influencing healthy adult weight maintenance.
These factors underscore why puppy weight calculations are estimates. Regular weigh-ins and monitoring your puppy's body condition score (BCS) with your veterinarian are essential for ensuring they are growing healthily.
Frequently Asked Questions (FAQ)
Q1: How accurate is the puppy weight calculator?
A: The calculator provides an estimate based on common breed growth patterns. Accuracy can range from 70-90%, especially for purebred dogs. Mixed breeds can be less predictable.
Q2: When do puppies stop growing?
A: Small breeds typically finish growing around 8-12 months. Medium breeds around 12-15 months. Large and giant breeds can continue growing until 18-24 months of age.
Q3: What if my puppy is a mixed breed?
A: For mixed breeds, try to identify the likely contributing breeds and choose the closest category or average the estimates. Observing the puppy's current structure (e.g., paw size, head shape) can also offer clues.
Q4: Is it better to feed a puppy more to ensure it reaches its potential size?
A: No, overfeeding can be detrimental, especially for large breeds, leading to obesity and skeletal problems. Feed a high-quality puppy food appropriate for its expected adult size and follow feeding guidelines, adjusting based on your vet's advice and your puppy's body condition.
Q5: My puppy is much smaller/larger than the estimate at 6 months. Should I worry?
A: Monitor your puppy's overall health, energy levels, and appetite. Some puppies have growth spurts or slower periods. If you have concerns, consult your veterinarian, as they can assess your puppy's individual growth curve.
Q6: How often should I weigh my puppy?
A: For young puppies (under 6 months), weekly or bi-weekly weigh-ins are helpful. For older puppies, monthly weigh-ins are usually sufficient until they reach their adult size.
Q7: Can the calculator predict the exact weight?
A: No calculator can guarantee an exact weight. Genetics, diet, health, and environment all play significant roles. This tool provides a helpful guideline, not a definitive prediction.
Q8: What is a healthy adult weight range for my dog?
A: This calculator provides an estimate. For precise breed weight ranges, consult breed standards from organizations like the AKC (American Kennel Club) or the FCI (Fédération Cynologique Internationale).
Related Tools and Internal Resources
Puppy Weight CalculatorUse our tool to estimate your puppy's adult weight based on breed and current measurements.
Dog Food CalculatorDetermine the appropriate daily food intake for your dog based on age, weight, and activity level.
Puppy Growth Chart GuideVisualize the typical growth stages of puppies and understand key developmental milestones.
Dog Breed Size GuideExplore different dog breeds and their typical adult sizes, temperaments, and care needs.
Pet Care Cost EstimatorBudget for the expenses associated with owning a dog, from food and vet care to grooming and toys.
Senior Dog Care GuideLearn how to provide the best care for your aging canine companion, focusing on health and comfort.
var canvas = null;
var ctx = null;
var initialData = {};
function initializeChart() {
canvas = document.getElementById('growthChart');
if (canvas) {
ctx = canvas.getContext('2d');
canvas.width = canvas.offsetWidth;
canvas.height = canvas.offsetHeight;
drawChart([], [], "Current Weight (lbs)", "Age (Weeks)");
}
}
function drawChart(labels, data, yAxisLabel, xAxisLabel) {
if (!ctx) return;
var chartWidth = canvas.width;
var chartHeight = canvas.height;
var padding = 40;
var chartAreaWidth = chartWidth – 2 * padding;
var chartAreaHeight = chartHeight – 2 * padding;
ctx.clearRect(0, 0, chartWidth, chartHeight);
ctx.fillStyle = '#fff';
ctx.fillRect(0, 0, chartWidth, chartHeight);
// Draw Axes
ctx.strokeStyle = '#ccc';
ctx.lineWidth = 1;
ctx.beginPath();
ctx.moveTo(padding, padding); // Top-left corner
ctx.lineTo(padding, chartHeight – padding); // Y-axis
ctx.lineTo(chartWidth – padding, chartHeight – padding); // X-axis
ctx.stroke();
// Draw Labels and Title
ctx.fillStyle = '#333′;
ctx.font = '14px Arial';
ctx.textAlign = 'center';
ctx.fillText(yAxisLabel, padding / 2, chartHeight / 2, padding); // Y-axis label
ctx.textAlign = 'center';
ctx.fillText(xAxisLabel, chartWidth / 2, chartHeight – padding / 2, chartAreaWidth); // X-axis label
ctx.font = '16px Arial Bold';
ctx.fillText('Puppy Growth Projection', chartWidth / 2, padding / 2); // Chart Title
if (labels.length === 0 || data.length === 0) return;
// Find max value for scaling
var maxValue = Math.max.apply(null, data);
if (maxValue === 0) maxValue = 1; // Avoid division by zero
var scaleY = chartAreaHeight / maxValue;
// Draw Data Points and Lines
ctx.strokeStyle = '#004a99';
ctx.lineWidth = 2;
ctx.beginPath();
var xStep = chartAreaWidth / (labels.length – 1);
data.forEach(function(value, index) {
var x = padding + index * xStep;
var y = chartHeight – padding – (value * scaleY);
if (index === 0) {
ctx.moveTo(x, y);
} else {
ctx.lineTo(x, y);
}
// Draw point
ctx.fillStyle = '#004a99';
ctx.beginPath();
ctx.arc(x, y, 4, 0, 2 * Math.PI);
ctx.fill();
});
ctx.stroke();
// Draw Y-axis ticks and labels
ctx.fillStyle = '#333';
ctx.textAlign = 'right';
var numTicks = 5;
for (var i = 0; i <= numTicks; i++) {
var tickValue = Math.round((maxValue / numTicks) * i);
var y = chartHeight – padding – (tickValue * scaleY);
ctx.fillText(tickValue, padding – 10, y);
ctx.beginPath();
ctx.moveTo(padding – 5, y);
ctx.lineTo(padding, y);
ctx.stroke();
}
// Draw X-axis ticks and labels
ctx.textAlign = 'center';
labels.forEach(function(label, index) {
var x = padding + index * xStep;
ctx.fillText(label, x, chartHeight – padding + 15);
ctx.beginPath();
ctx.moveTo(x, chartHeight – padding);
ctx.lineTo(x, chartHeight – padding + 5);
ctx.stroke();
});
}
function getBreedMultipliers() {
var breedType = document.getElementById('breedType').value;
var multipliers = {
small: { multiplier: 2.0, avgWeeksToMature: 40, weightAt6MonthsFactor: 0.45 },
medium: { multiplier: 2.7, avgWeeksToMature: 60, weightAt6MonthsFactor: 0.55 },
large: { multiplier: 3.5, avgWeeksToMature: 72, weightAt6MonthsFactor: 0.60 },
giant: { multiplier: 4.5, avgWeeksToMature: 90, weightAt6MonthsFactor: 0.65 }
};
return multipliers[breedType];
}
function calculatePuppyWeight() {
var currentWeight = parseFloat(document.getElementById('currentWeight').value);
var puppyAgeWeeks = parseFloat(document.getElementById('puppyAgeWeeks').value);
var breedType = document.getElementById('breedType').value;
var breedInfo = getBreedMultipliers();
var multiplier = breedInfo.multiplier;
var avgWeeksToMature = breedInfo.avgWeeksToMature;
var weightAt6MonthsFactor = breedInfo.weightAt6MonthsFactor;
var errors = {
currentWeight: '',
puppyAgeWeeks: ''
};
if (isNaN(currentWeight) || currentWeight <= 0) {
errors.currentWeight = 'Please enter a valid weight (must be positive).';
}
if (isNaN(puppyAgeWeeks) || puppyAgeWeeks avgWeeksToMature + 12) { // Allow some leeway past maturity
errors.puppyAgeWeeks = 'Age seems very high for a puppy. Please check.';
}
document.getElementById('currentWeightError').innerText = errors.currentWeight;
document.getElementById('puppyAgeWeeksError').innerText = errors.puppyAgeWeeks;
if (errors.currentWeight || errors.puppyAgeWeeks) {
document.getElementById('result').style.display = 'none';
return;
}
// Calculate Estimated Adult Weight
var estimatedAdultWeight = currentWeight * multiplier;
// Cap at a reasonable maximum to avoid extreme outliers for giant breeds
if (breedType === 'giant' && estimatedAdultWeight > 200) estimatedAdultWeight = 200;
if (breedType === 'small' && estimatedAdultWeight < 5) estimatedAdultWeight = 5;
// Calculate Weight at 6 Months (Approx.) – using a growth curve approximation
var currentAgeFactor = puppyAgeWeeks / 24; // 6 months = ~24 weeks
var weightAt6Months;
if (puppyAgeWeeks estimatedAdultWeight * 0.8) weightAt6Months = estimatedAdultWeight * 0.8;
} else { // If older than 6 months, project back or use a plateau assumption
weightAt6Months = currentWeight * ( (weightAt6MonthsFactor * 24) / puppyAgeWeeks );
// Ensure it doesn't go below current weight
if (weightAt6Months < currentWeight * 0.9) weightAt6Months = currentWeight * 0.9;
}
// Basic check to ensure weightAt6Months is reasonable relative to current and adult
weightAt6Months = Math.max(currentWeight * 0.9, Math.min(weightAt6Months, estimatedAdultWeight * 0.95));
weightAt6Months = Math.max(weightAt6Months, 1); // Ensure positive
// Calculate Weight Doubling Factor (relevant for younger puppies)
var weightDoublingFactor = '–';
if (puppyAgeWeeks < 20) { // Doubling is more relevant for puppies under ~5 months
weightDoublingFactor = (estimatedAdultWeight / currentWeight).toFixed(1) + 'x';
}
document.getElementById('mainResult').innerText = estimatedAdultWeight.toFixed(1) + ' lbs';
document.getElementById('result6Months').innerText = weightAt6Months.toFixed(1) + ' lbs';
document.getElementById('resultDoublingFactor').innerText = weightDoublingFactor;
document.getElementById('resultBreedMultiplier').innerText = multiplier;
document.getElementById('result').style.display = 'block';
// Update Chart Data
updateChart(currentWeight, puppyAgeWeeks, estimatedAdultWeight, weightAt6Months, avgWeeksToMature);
}
function updateChart(currentWeight, currentAgeWeeks, estimatedAdultWeight, weightAt6Months, avgWeeksToMature) {
var labels = [];
var data = [];
// Generate data points for the chart
var maxWeeks = Math.max(avgWeeksToMature + 20, currentAgeWeeks + 20, 60); // Extend chart a bit beyond maturity or current age
var step = Math.max(1, Math.floor(maxWeeks / 15)); // Aim for around 15 data points
for (var week = 0; week <= maxWeeks; week += step) {
labels.push(week);
var projectedWeight;
if (week < currentAgeWeeks) {
// Project backwards linearly if younger than current age (less accurate but for visualization)
projectedWeight = currentWeight * (week / currentAgeWeeks);
if (projectedWeight < 0.5) projectedWeight = 0.5; // Minimum weight
} else if (week === currentAgeWeeks) {
projectedWeight = currentWeight;
} else if (week <= 24) { // Use the calculated weight at 6 months for interpolation up to 6 months
projectedWeight = currentWeight + (weightAt6Months – currentWeight) * ((week – currentAgeWeeks) / (24 – currentAgeWeeks));
if(projectedWeight < currentWeight) projectedWeight = currentWeight; // Prevent decrease
}
else if (week estimatedAdultWeight * 1.1) projectedWeight = estimatedAdultWeight * 1.1; // Cap increase
}
// Ensure weight doesn't decrease and stays within reasonable bounds
projectedWeight = Math.max(0.5, projectedWeight);
if (week > currentAgeWeeks && projectedWeight estimatedAdultWeight * 1.2) projectedWeight = estimatedAdultWeight * 1.2; // Absolute upper limit
data.push(parseFloat(projectedWeight.toFixed(1)));
}
// Ensure the estimated adult weight is represented if not already a point
var adultWeightIndex = labels.indexOf(Math.round(avgWeeksToMature));
if (adultWeightIndex === -1 && avgWeeksToMature avgWeeksToMature; });
if (insertIndex === -1) { // If it's the largest week
labels.push(Math.round(avgWeeksToMature));
data.push(parseFloat(estimatedAdultWeight.toFixed(1)));
} else {
labels.splice(insertIndex, 0, Math.round(avgWeeksToMature));
data.splice(insertIndex, 0, parseFloat(estimatedAdultWeight.toFixed(1)));
}
} else if (adultWeightIndex !== -1) {
data[adultWeightIndex] = parseFloat(estimatedAdultWeight.toFixed(1)); // Ensure it's accurate
}
drawChart(labels, data, "Weight (lbs)", "Age (Weeks)");
}
function copyResults() {
var mainResult = document.getElementById('mainResult').innerText;
var result6Months = document.getElementById('result6Months').innerText;
var resultDoublingFactor = document.getElementById('resultDoublingFactor').innerText;
var resultBreedMultiplier = document.getElementById('resultBreedMultiplier').innerText;
var breedType = document.getElementById('breedType');
var breedTypeLabel = breedType.options[breedType.selectedIndex].text;
var assumptions = "Assumptions:\n" +
"- Breed Type: " + breedTypeLabel + "\n" +
"- Calculated Breed Multiplier: " + resultBreedMultiplier + "\n" +
"- The calculation is an estimate and actual weight may vary.";
var resultsText = "Estimated Puppy Full Grown Weight:\n\n" +
"Estimated Adult Weight: " + mainResult + "\n" +
"Estimated Weight at 6 Months: " + result6Months + "\n" +
"Approximate Weight Doubling Factor: " + resultDoublingFactor + "\n\n" +
assumptions;
// Use temporary textarea for copying
var textArea = document.createElement("textarea");
textArea.value = resultsText;
textArea.style.position = "fixed";
textArea.style.opacity = 0;
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
var successful = document.execCommand('copy');
var msg = successful ? 'Results copied!' : 'Failed to copy results.';
console.log(msg);
// Optionally, show a temporary notification to the user
var notification = document.createElement('div');
notification.textContent = msg;
notification.style.cssText = 'position: fixed; top: 20px; right: 20px; background-color: #004a99; color: white; padding: 10px; border-radius: 5px; z-index: 1000;';
document.body.appendChild(notification);
setTimeout(function() {
notification.remove();
}, 3000);
} catch (err) {
console.error('Fallback: Oops, unable to copy', err);
}
document.body.removeChild(textArea);
}
function resetCalculator() {
document.getElementById('breedType').value = 'medium';
document.getElementById('currentWeight').value = ";
document.getElementById('puppyAgeWeeks').value = ";
document.getElementById('currentWeightError').innerText = ";
document.getElementById('puppyAgeWeeksError').innerText = ";
document.getElementById('result').style.display = 'none';
// Reset chart to initial state or clear it
drawChart([], [], "Weight (lbs)", "Age (Weeks)");
}
function updateFormValidation() {
var currentWeightInput = document.getElementById('currentWeight');
var puppyAgeWeeksInput = document.getElementById('puppyAgeWeeks');
var currentWeightError = document.getElementById('currentWeightError');
var puppyAgeWeeksError = document.getElementById('puppyAgeWeeksError');
// Re-validate current inputs when breed changes, as maturity weeks change
validateInput(currentWeightInput, currentWeightError, 'Please enter a valid weight (must be positive).');
validateInput(puppyAgeWeeksInput, puppyAgeWeeksError, 'Please enter a valid age in weeks (must be positive).');
}
function validateInput(inputElement, errorElement, errorMessage) {
var value = parseFloat(inputElement.value);
var name = inputElement.id;
var breedInfo = getBreedMultipliers();
var avgWeeksToMature = breedInfo.avgWeeksToMature;
if (isNaN(value) || value avgWeeksToMature + 12) {
errorElement.innerText = 'Age seems very high for a puppy. Please check.';
}
else {
errorElement.innerText = ";
}
}
// Initialize on load
window.onload = function() {
initializeChart();
// Optionally set default values or perform an initial calculation if inputs are pre-filled
calculatePuppyWeight(); // Run calculation if defaults are set and valid
};