Estimate your puppy's adult weight based on breed, current age, and current weight. Get insights into their expected growth trajectory.
Small (e.g., Chihuahua, Yorkie)
Medium (e.g., Beagle, Cocker Spaniel)
Large (e.g., Labrador, German Shepherd)
Giant (e.g., Great Dane, Mastiff)
Select your puppy's expected adult breed size.
Enter your puppy's current age in whole weeks.
Enter your puppy's current weight in pounds.
Your Puppy's Estimated Adult Weight
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—
Estimated Adult Weight (lbs)
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Weeks to Full Growth
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Avg. Weekly Gain (lbs)
Formula Used: This calculator uses a simplified exponential growth model common for puppies, factoring in breed size, current age, and current weight to project adult weight. It also estimates the remaining growth period.
Puppy Growth Chart
This chart visualizes your puppy's projected growth based on the calculated estimates. The blue line represents the estimated growth, and the red dots show potential points of reference.
Growth Milestones Table
Age (Weeks)
Estimated Weight (lbs)
Growth Rate (lbs/week)
A detailed breakdown of estimated weight and growth rate at different stages.
What is a Weight Puppy Calculator?
A weight puppy calculator is a specialized online tool designed to help pet owners and prospective dog owners estimate the adult weight of their puppy. By inputting key information such as the puppy's current age, current weight, and its breed or expected adult size, the calculator provides an estimated final weight. This is incredibly useful for understanding if your puppy is on track for healthy growth, for planning for the dietary needs of a larger or smaller dog, and for managing expectations regarding the size of your future canine companion. Many puppies grow at a rapid pace, and knowing their projected adult size helps in various aspects of care, from purchasing the right size food bags to ensuring they have adequate space. This type of calculator is a practical application of predictive modeling applied to canine development.
Who should use it?
New puppy owners who want to understand their dog's future size.
Owners of mixed-breed puppies where adult size might be uncertain.
Owners concerned about their puppy's current growth rate – is it too fast, too slow, or just right?
Breeders looking for a quick estimation tool for clients.
Anyone curious about canine growth patterns.
Common misconceptions:
Myth: The calculator gives a 100% accurate final weight. Reality: It's an estimate; genetics, diet, health, and environment play significant roles.
Myth: All puppies of the same breed reach the exact same weight. Reality: There's a natural range of healthy weights for any given breed.
Myth: The calculator replaces veterinary advice. Reality: It's a supplementary tool; always consult your vet for personalized health and growth advice.
Weight Puppy Calculator Formula and Mathematical Explanation
The core of a weight puppy calculator relies on predictive formulas that model canine growth. While exact formulas can vary, they often incorporate principles of exponential growth, adjusted for breed-specific characteristics. A common approach is to use a formula that approximates the growth curve, which is steepest in the early months and gradually flattens as the puppy approaches adulthood.
One simplified model can be represented as:
Estimated Adult Weight = Current Weight / (Percentage of Adult Growth Achieved)
The Percentage of Adult Growth Achieved is derived from the puppy's current age relative to its breed's typical maturity timeline.
For a more refined prediction, especially considering the rapid early growth, a formula that incorporates an exponential decay component for growth rate might be used:
Projected Weight(t) is the estimated weight at time t.
Adult Weight is the target adult weight.
e is the base of the natural logarithm (approximately 2.71828).
k is a growth rate constant, influenced by breed size.
t is the age of the puppy.
Our calculator simplifies this by using the current weight and age to estimate the adult weight and remaining growth period. The key variables considered are:
Variables Explained:
Variable
Meaning
Unit
Typical Range
Breed Size Factor
A multiplier reflecting the general growth trajectory and adult size potential of a breed group.
The projected final weight of the puppy once fully grown.
Pounds (lbs)
Varies widely by breed (e.g., 5 lbs for a toy breed to 200+ lbs for a giant breed)
Weeks to Full Growth
The estimated number of weeks remaining until the puppy reaches its adult size.
Weeks
Varies by breed and current age.
Avg. Weekly Gain
The average amount the puppy is expected to gain per week during its remaining growth period.
Pounds (lbs) / Week
Varies, typically higher for larger breeds and younger puppies.
The calculator uses these inputs to reverse-engineer an estimated adult weight and to project future milestones. It aims to provide a reasonable estimate, but individual variation is significant. Understanding these factors helps interpret the results accurately.
Practical Examples (Real-World Use Cases)
Let's explore how the weight puppy calculator can be used in practice:
Example 1: Medium-Sized Breed Puppy
Scenario: Sarah has a 10-week-old Labrador Retriever puppy named Max. Max currently weighs 12 lbs. Sarah wants to know how big Max is likely to get and if his growth seems on track.
Inputs:
Breed Size: Large (Labradors fall into this category)
Current Age: 10 weeks
Current Weight: 12 lbs
Calculator Output:
Estimated Adult Weight: 65 lbs
Weeks to Full Growth: 52 weeks (approximately 1 year)
Avg. Weekly Gain: 1.0 lbs/week
Interpretation: Based on these inputs, Max is projected to reach a healthy adult weight of around 65 lbs. His current growth rate suggests he'll continue to gain about 1 lb per week for the next year. Sarah can use this information to adjust his food portions and ensure she's feeding a high-quality puppy food suitable for large breeds to support healthy bone and joint development.
Example 2: Small Breed Puppy
Scenario: John adopted a 6-week-old Dachshund puppy, Lucy, who weighs 2.5 lbs. He's curious about her final size as Dachshunds can vary.
Inputs:
Breed Size: Small (Dachshunds fit here)
Current Age: 6 weeks
Current Weight: 2.5 lbs
Calculator Output:
Estimated Adult Weight: 18 lbs
Weeks to Full Growth: 40 weeks (approximately 9 months)
Avg. Weekly Gain: 0.4 lbs/week
Interpretation: Lucy is estimated to reach an adult weight of about 18 lbs. Her expected weekly gain is around 0.4 lbs. This estimate helps John understand that Lucy will be a moderately sized small dog, requiring appropriate nutrition and care throughout her growth phases. It's important to note that Dachshunds are prone to back issues, so maintaining a healthy weight throughout life, guided by these estimates, is crucial.
How to Use This Weight Puppy Calculator
Using the weight puppy calculator is straightforward and takes just a few moments. Follow these simple steps to get your puppy's growth projection:
Select Breed Size: Choose the option that best matches your puppy's breed or expected adult size (Small, Medium, Large, Giant). If you have a mixed breed, consider the larger parent's breed size category.
Enter Current Age: Input your puppy's current age in weeks. Be as accurate as possible.
Enter Current Weight: Provide your puppy's current weight in pounds (lbs).
Click 'Calculate Growth': Press the button to see the results.
How to read results:
Estimated Adult Weight: This is the primary output, showing the projected weight in pounds your puppy will likely reach when fully mature.
Weeks to Full Growth: This indicates the approximate time remaining until your puppy stops growing significantly.
Avg. Weekly Gain: This shows the expected average weight gain per week during the remaining growth period.
Decision-making guidance:
Compare to breed standards: If your puppy's estimated adult weight is significantly higher or lower than the typical range for its breed, consult your veterinarian.
Adjust diet: Use the estimated growth rate to ensure you are feeding the appropriate amount of puppy food. Overfeeding can lead to obesity, while underfeeding can stunt growth.
Monitor health: Consistent monitoring of your puppy's weight gain is crucial. Sudden changes or deviations from the projected curve warrant a veterinary check-up.
Plan ahead: Knowing your dog's likely adult size helps in purchasing appropriate-sized beds, crates, and collars.
Remember, these are estimates. Environmental factors, diet quality, genetics, and overall health significantly impact a puppy's growth.
Key Factors That Affect Weight Puppy Calculator Results
While the weight puppy calculator provides a valuable estimate, several factors can influence your puppy's actual growth trajectory. Understanding these elements helps you interpret the calculator's output more effectively and provide the best care:
Genetics and Breed: This is the most significant factor. Purebred dogs have predictable size ranges. Mixed breeds can be less predictable, often falling somewhere between the sizes of their parent breeds, or sometimes exceeding them. Our calculator accounts for general breed size categories, but individual genetic variations exist.
Nutrition Quality and Quantity: The food you feed your puppy is critical. High-quality puppy food provides the necessary proteins, fats, vitamins, and minerals for optimal growth. Feeding too much can lead to rapid weight gain and potential joint issues, especially in large breeds. Feeding too little can stunt growth. The calculator assumes a reasonably balanced diet.
Health Conditions: Underlying health issues, such as parasites, hormonal imbalances (like hypothyroidism), or chronic illnesses, can significantly affect a puppy's growth rate and final weight. Regular veterinary check-ups are essential to rule out or manage such conditions.
Neutering/Spaying: Early neutering or spaying can sometimes influence growth plates and metabolic rate, potentially affecting final adult height and weight differently than in intact dogs. The long-term effects are still debated, but it's a factor to consider.
Exercise and Activity Level: While exercise is crucial for overall health and muscle development, excessively strenuous exercise for a young puppy, particularly in large breeds, can negatively impact developing joints. A moderate, consistent level of play usually supports healthy growth.
Age at Calculation: The earlier in a puppy's life you use the calculator, the less certain the prediction. Puppies experience rapid, non-linear growth in their first few months. As they get older, their growth rate slows, making predictions more reliable.
Environmental Factors: Stress, housing conditions, and overall environment can subtly influence a puppy's well-being and growth. A stable, nurturing environment generally supports better development.
It's crucial to use the calculator as a guide and always prioritize your veterinarian's professional advice for your puppy's specific needs.
Frequently Asked Questions (FAQ)
Q1: How accurate is a weight puppy calculator?
A: These calculators provide estimates based on common growth patterns for breeds. Accuracy can range from 70-90%, but individual genetics, diet, and health can cause significant variation. Always consult your vet.
Q2: My puppy is a mixed breed. How do I use the calculator?
A: For mixed breeds, it's best to select the breed size category that corresponds to the largest of the known parent breeds, or the size you anticipate the puppy will reach. You might also consider averaging the expected adult weights if you know both parent breeds.
Q3: My puppy seems to be growing faster than the calculator predicts. Should I worry?
A: A faster growth rate isn't always a problem, especially if your puppy is a larger breed. However, rapid growth can sometimes lead to developmental orthopedic diseases. Monitor your puppy's body condition (are they too thin or too plump?) and consult your veterinarian to ensure they are growing healthily.
Q4: My puppy is growing slower than predicted. What should I do?
A: Slower growth might be perfectly normal for some puppies, especially if they are on the smaller end of their breed's spectrum. However, if the growth is significantly slower than expected, or if your puppy seems lethargic or unwell, consult your vet to rule out underlying health issues or nutritional deficiencies.
Q5: At what age does a puppy stop growing?
A: This varies greatly by breed. Small breeds typically finish growing around 6-9 months, medium breeds around 12-15 months, and large to giant breeds can continue filling out until they are 18-24 months old.
Q6: How much should my puppy eat daily?
A: Feeding guidelines vary based on the puppy's age, weight, activity level, and the specific food's calorie density. Always refer to the feeding chart on your chosen puppy food packaging and adjust based on your puppy's body condition and your vet's recommendations. Our calculator's "Avg. Weekly Gain" can help inform portion adjustments.
Q7: Can I use this calculator for older dogs?
A: No, this calculator is specifically designed for puppies still in their growth phase. Once a dog has reached its adult size, its weight should stabilize, and you would use a regular weight management tool or consult a vet for optimal adult weight.
Q8: What is the difference between 'weight' and 'height' growth in puppies?
A: Puppies typically reach their full height before they reach their full weight or 'fill out'. Weight gain continues for longer, especially in large breeds, as their frame matures and they put on muscle mass. This calculator focuses on predicting the final adult weight.
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var myChart = null; // Global variable for chart instance
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console.error("Canvas element not found!");
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ctx = chartCanvas.getContext('2d');
if (ctx) {
myChart = new Chart(ctx, {
type: 'line',
data: {
labels: [], // Will be populated with ages
datasets: [{
label: 'Estimated Weight (lbs)',
data: [], // Will be populated with weights
borderColor: 'rgb(75, 192, 192)',
tension: 0.1,
fill: false,
pointRadius: 5,
pointBackgroundColor: 'rgb(75, 192, 192)'
}, {
label: 'Current Weight Point',
data: [], // To mark current weight
borderColor: 'rgb(255, 99, 132)',
backgroundColor: 'rgb(255, 99, 132)',
tension: 0,
fill: false,
pointRadius: 7,
pointStyle: 'rectRot', // Square with rounded corners
showLine: false // Do not draw a line for this dataset
}]
},
options: {
responsive: true,
maintainAspectRatio: true,
scales: {
x: {
title: {
display: true,
text: 'Age (Weeks)'
}
},
y: {
title: {
display: true,
text: 'Weight (lbs)'
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plugins: {
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}
// Function to add Chart.js if it's not already loaded
function loadChartJs() {
if (typeof Chart === 'undefined') {
var script = document.createElement('script');
script.src = 'https://cdn.jsdelivr.net/npm/chart.js@3.7.0/dist/chart.min.js';
script.onload = function() {
initializeChart();
};
document.head.appendChild(script);
} else {
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function validateInput(id, min, max, isEmptyAllowed = false) {
var inputElement = document.getElementById(id);
var errorElement = document.getElementById(id + 'Error');
var value = inputElement.value.trim();
errorElement.textContent = "; // Clear previous error
if (value === " && !isEmptyAllowed) {
errorElement.textContent = 'This field is required.';
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if (value === " && isEmptyAllowed) {
return true;
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var numberValue = parseFloat(value);
if (isNaN(numberValue)) {
errorElement.textContent = 'Please enter a valid number.';
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}
if (!isEmptyAllowed && numberValue <= 0 && id !== 'puppyAge') { // Allow age 0 or more, weight must be positive
errorElement.textContent = 'Value must be positive.';
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if (id === 'puppyAge' && numberValue < 1) {
errorElement.textContent = 'Age must be at least 1 week.';
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errorElement.textContent = 'Weight must be at least 0.1 lbs.';
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function calculateWeight() {
var breedSize = document.getElementById('breedSize').value;
var puppyAge = parseFloat(document.getElementById('puppyAge').value);
var currentWeight = parseFloat(document.getElementById('currentWeight').value);
var breedSizeError = document.getElementById('breedSizeError');
var puppyAgeError = document.getElementById('puppyAgeError');
var currentWeightError = document.getElementById('currentWeightError');
var errorMessage = document.getElementById('errorMessage');
errorMessage.textContent = "; // Clear main error message
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if (!breedSizeValid) breedSizeError.textContent = 'Please select a breed size.';
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var puppyAgeValid = validateInput('puppyAge', 1);
var currentWeightValid = validateInput('currentWeight', 0.1);
if (!breedSizeValid || !puppyAgeValid || !currentWeightValid) {
// Update primary results to indicate invalid input
document.getElementById('primaryResult').textContent = '–';
document.getElementById('adultWeightEstimate').textContent = '–';
document.getElementById('weeksToFullGrowth').textContent = '–';
document.getElementById('weeklyGainEstimate').textContent = '–';
clearTable();
clearChart();
return;
}
var breedFactors = {
small: { adultWeightRange: [5, 25], growthRateFactor: 0.7, maturityWeeks: 40 },
medium: { adultWeightRange: [25, 55], growthRateFactor: 1.0, maturityWeeks: 52 },
large: { adultWeightRange: [55, 90], growthRateFactor: 1.4, maturityWeeks: 60 },
giant: { adultWeightRange: [90, 200], growthRateFactor: 2.0, maturityWeeks: 78 }
};
var factors = breedFactors[breedSize];
var baseAdultWeight = (factors.adultWeightRange[0] + factors.adultWeightRange[1]) / 2;
var estimatedAdultWeight;
var weeksToFullGrowth;
var weeklyGainEstimate;
// Simplified projection logic
if (puppyAge < factors.maturityWeeks) {
// Estimate current stage proportion and project forward
var growthProportion = puppyAge / factors.maturityWeeks;
var currentWeightProportion = currentWeight / baseAdultWeight;
// Crude projection: If current weight is proportionally less than age, adult weight might be higher
// If current weight is proportionally more, adult weight might be lower
// This is a very simplified model. A more complex one would use exponential curves.
var weightAdjustmentFactor = currentWeightProportion / growthProportion;
estimatedAdultWeight = baseAdultWeight * weightAdjustmentFactor;
// Cap the estimated weight within reasonable breed bounds if it goes too far off
if (estimatedAdultWeight factors.adultWeightRange[1]) estimatedAdultWeight = factors.adultWeightRange[1];
weeksToFullGrowth = factors.maturityWeeks – puppyAge;
weeklyGainEstimate = (estimatedAdultWeight – currentWeight) / weeksToFullGrowth;
// Ensure weekly gain is positive and reasonable
if (isNaN(weeklyGainEstimate) || weeklyGainEstimate 5 && breedSize !== 'giant') { // Avoid absurdly high weekly gains for non-giant breeds
weeklyGainEstimate = 3.0;
}
if (weeklyGainEstimate > 10 && breedSize === 'giant') { // Cap for giant breeds
weeklyGainEstimate = 10.0;
}
} else {
// Puppy is likely near or past maturity age
estimatedAdultWeight = currentWeight; // Assume current weight is close to adult weight
weeksToFullGrowth = 0;
weeklyGainEstimate = 0;
}
// Rounding
estimatedAdultWeight = parseFloat(estimatedAdultWeight.toFixed(1));
weeksToFullGrowth = Math.round(weeksToFullGrowth);
weeklyGainEstimate = parseFloat(weeklyGainEstimate.toFixed(2));
// Display results
document.getElementById('primaryResult').textContent = estimatedAdultWeight + ' lbs';
document.getElementById('adultWeightEstimate').textContent = estimatedAdultWeight;
document.getElementById('weeksToFullGrowth').textContent = weeksToFullGrowth;
document.getElementById('weeklyGainEstimate').textContent = weeklyGainEstimate;
// Update Chart and Table
updateChartAndTable(puppyAge, currentWeight, estimatedAdultWeight, weeksToFullGrowth, factors.maturityWeeks, breedSize);
}
function updateChartAndTable(currentAge, currentWeight, estimatedAdultWeight, weeksRemaining, totalMaturityWeeks, breedSize) {
if (!ctx || !myChart) {
loadChartJs(); // Attempt to load chart if not initialized
// Use setTimeout to give Chart.js time to load before calling update
setTimeout(function() {
updateChartAndTable(currentAge, currentWeight, estimatedAdultWeight, weeksRemaining, totalMaturityWeeks, breedSize);
}, 1000); // Retry after 1 second
return;
}
var labels = [];
var weights = [];
var growthRate = [];
var tableBody = document.getElementById('growthTableBody');
tableBody.innerHTML = "; // Clear previous table rows
var breedFactors = {
small: { adultWeightRange: [5, 25], growthRateFactor: 0.7, maturityWeeks: 40 },
medium: { adultWeightRange: [25, 55], growthRateFactor: 1.0, maturityWeeks: 52 },
large: { adultWeightRange: [55, 90], growthRateFactor: 1.4, maturityWeeks: 60 },
giant: { adultWeightRange: [90, 200], growthRateFactor: 2.0, maturityWeeks: 78 }
};
var factors = breedFactors[breedSize];
var projectedEndWeight = estimatedAdultWeight;
var projectedStartWeight = currentWeight;
var projectedAge = currentAge;
var projectedWeeksLeft = weeksRemaining;
var totalGrowthWeeks = totalMaturityWeeks;
// Ensure we have a valid adult weight to project towards
if (isNaN(projectedEndWeight) || projectedEndWeight <= 0) {
projectedEndWeight = (factors.adultWeightRange[0] + factors.adultWeightRange[1]) / 2; // Fallback
}
// If current age is past maturity, project from current weight onwards
var chartMaxAge = Math.max(totalGrowthWeeks, currentAge + 10); // Show at least 10 weeks past current age or maturity, whichever is later
for (var age = 1; age <= chartMaxAge; age++) {
var projectedWeight;
var avgWeeklyGainCalc;
if (age < currentAge) {
// For ages before current age, use a reverse calculation or a standard growth curve
// Simple approach: Assume linear growth from a plausible birth weight up to current weight
var birthWeightEstimate = currentWeight / (currentAge / factors.maturityWeeks) * 0.2; // Very rough guess
if (isNaN(birthWeightEstimate) || birthWeightAge 1) {
var prevWeight = weights[weights.length -1] || birthWeightEstimate;
avgWeeklyGainCalc = projectedWeight – prevWeight;
} else {
avgWeeklyGainCalc = projectedWeight – birthWeightEstimate; // Gain from birth to week 1
}
} else if (age === currentAge) {
projectedWeight = currentWeight;
avgWeeklyGainCalc = growthRate.length > 0 ? (currentWeight – weights[weights.length – 1]) : 0; // Approx gain up to now
} else {
// For ages after current age, project forward
var weeksIntoFuture = age – currentAge;
if (weeksIntoFuture <= projectedWeeksLeft) {
projectedWeight = currentWeight + (weeksIntoFuture * ( (estimatedAdultWeight – currentWeight) / projectedWeeksLeft ) );
avgWeeklyGainCalc = (estimatedAdultWeight – currentWeight) / projectedWeeksLeft;
} else {
// After reaching estimated adult weight, keep it steady
projectedWeight = estimatedAdultWeight;
avgWeeklyGainCalc = 0; // No more growth
}
}
// Ensure weights don't go below a minimum plausible value (e.g., birth weight)
var minPlausibleWeight = 0.5; // Example minimum
if (projectedWeight = 1 && age % 4 === 0) { // Add rows for every 4 weeks
var row = tableBody.insertRow();
var cellAge = row.insertCell(0);
var cellWeight = row.insertCell(1);
var cellRate = row.insertCell(2);
cellAge.textContent = age;
cellWeight.textContent = projectedWeight.toFixed(1);
cellRate.textContent = avgWeeklyGainCalc.toFixed(2);
}
}
// Add current age/weight point explicitly if it's not exactly on a row generated above
if (!labels.includes(currentAge)) {
// Add current age/weight if not already present in the labels
var insertIndex = labels.findIndex(label => label > currentAge);
if (insertIndex === -1) { // If currentAge is the largest
labels.push(currentAge);
weights.push(currentWeight);
growthRate.push(isNaN(growthRate[growthRate.length -1]) ? 0 : growthRate[growthRate.length -1]); // Approximate gain
} else {
labels.splice(insertIndex, 0, currentAge);
weights.splice(insertIndex, 0, currentWeight);
growthRate.splice(insertIndex, 0, growthRate[insertIndex-1] || 0); // Approximate gain
}
}
// Update chart data
myChart.data.labels = labels;
myChart.data.datasets[0].data = weights;
// Update the 'Current Weight Point' dataset
myChart.data.datasets[1].data = labels.map(label => {
if (label === currentAge) return currentWeight;
return null; // Set null for other points so only current weight is shown
});
myChart.update();
}
function clearTable() {
var tableBody = document.getElementById('growthTableBody');
if (tableBody) {
tableBody.innerHTML = ";
}
}
function clearChart() {
if (myChart) {
myChart.data.labels = [];
myChart.data.datasets[0].data = [];
myChart.data.datasets[1].data = [];
myChart.update();
}
}
function resetForm() {
document.getElementById('breedSize').value = 'medium'; // Default to medium
document.getElementById('puppyAge').value = 12;
document.getElementById('currentWeight').value = 15;
// Clear errors
document.getElementById('breedSizeError').textContent = ";
document.getElementById('puppyAgeError').textContent = ";
document.getElementById('currentWeightError').textContent = ";
document.getElementById('errorMessage').textContent = ";
// Recalculate and update display
calculateWeight();
clearTable();
clearChart();
}
function copyResults() {
var adultWeight = document.getElementById('adultWeightEstimate').textContent;
var weeksToFullGrowth = document.getElementById('weeksToFullGrowth').textContent;
var weeklyGainEstimate = document.getElementById('weeklyGainEstimate').textContent;
var primaryResult = document.getElementById('primaryResult').textContent;
var breedSize = document.getElementById('breedSize').value;
var puppyAge = document.getElementById('puppyAge').value;
var currentWeight = document.getElementById('currentWeight').value;
var assumptions = `Key Assumptions:\n- Breed Size: ${breedSize}\n- Current Age: ${puppyAge} weeks\n- Current Weight: ${currentWeight} lbs`;
var resultsText = `Puppy Growth Estimates:\n\nPrimary Projection: ${primaryResult}\n\nEstimated Adult Weight: ${adultWeight} lbs\nWeeks to Full Growth: ${weeksToFullGrowth}\nAvg. Weekly Gain: ${weeklyGainEstimate} lbs/week\n\n${assumptions}`;
// Use navigator.clipboard if available, otherwise fallback
if (navigator.clipboard && navigator.clipboard.writeText) {
navigator.clipboard.writeText(resultsText).then(function() {
alert('Results copied to clipboard!');
}).catch(function(err) {
console.error('Failed to copy text: ', err);
fallbackCopyTextToClipboard(resultsText);
});
} else {
fallbackCopyTextToClipboard(resultsText);
}
}
// Fallback for browsers that don't support navigator.clipboard
function fallbackCopyTextToClipboard(text) {
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textArea.value = text;
textArea.style.position = "fixed";
textArea.style.left = "-9999px";
textArea.style.top = "-9999px";
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
var successful = document.execCommand('copy');
var msg = successful ? 'Results copied to clipboard!' : 'Copying text command was unsuccessful';
alert(msg);
} catch (err) {
console.error('Fallback: Oops, unable to copy', err);
alert('Copying failed. Please copy manually.');
}
document.body.removeChild(textArea);
}
// Initial calculation on page load
window.onload = function() {
loadChartJs(); // Load Chart.js and initialize chart
calculateWeight();
};