Aluminium Weight Calculator India – Calculate Aluminium Weight Accurately
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Aluminium Weight Calculator India
Calculate the precise weight of aluminium based on its dimensions and shape. Essential for procurement, manufacturing, and logistics in India.
Aluminium Weight Calculator
Calculation Results
— kg
Formula Used: Weight = Volume × Density. Volume is calculated based on the shape and dimensions. Density varies by aluminium grade.
What is the Aluminium Weight Calculator India?
The Aluminium Weight Calculator India is a specialized online tool designed to accurately determine the weight of aluminium components based on their specific dimensions, shape, and grade. In India's dynamic industrial landscape, where aluminium is a critical material across sectors like automotive, aerospace, construction, and consumer goods, precise weight calculation is paramount. This calculator simplifies a complex process, providing instant results that are crucial for cost estimation, material procurement, inventory management, and logistical planning. It eliminates the need for manual calculations, reducing errors and saving valuable time for engineers, procurement specialists, fabricators, and business owners.
Who Should Use It?
- Manufacturers & Fabricators: To estimate raw material costs and final product weight for quotes and production planning.
- Procurement Managers: To accurately order the required quantity of aluminium, optimizing inventory and avoiding overstocking or shortages.
- Engineers & Designers: To verify material specifications and ensure components meet weight requirements in designs.
- Logistics & Shipping Companies: To estimate shipping costs and plan transportation based on accurate material weight.
- Traders & Suppliers: To quickly price aluminium products and manage stock efficiently.
- Students & Educators: For learning and practical application of material science principles.
Common Misconceptions:
- Density is Constant: A common mistake is assuming all aluminium has the same density. In reality, different aluminium alloys (grades) have slightly different densities, which can impact the final weight calculation. Our calculator accounts for this by allowing grade selection.
- Units Don't Matter: Mixing units (e.g., using inches for dimensions and expecting kilograms) leads to significant errors. This calculator standardizes on millimeters for dimensions and provides results in kilograms, ensuring consistency.
- Shape is Irrelevant: The calculation depends heavily on the geometry. A simple rod weighs differently than a sheet or tube of the same overall dimensions. The calculator correctly applies shape-specific volume formulas.
Aluminium Weight Calculator Formula and Mathematical Explanation
The core principle behind calculating the weight of any material, including aluminium, is the relationship between its volume, density, and the gravitational acceleration (though for practical purposes on Earth, we often simplify to mass). The fundamental formula is:
Weight (Mass) = Volume × Density
Let's break down how this applies in our calculator:
- Volume Calculation: This is the most variable part, depending on the shape of the aluminium.
- Rod/Bar (Circular): Volume = π × (Diameter/2)² × Length
- Sheet/Plate (Rectangular): Volume = Width × Length × Thickness
- Tube/Pipe (Hollow Cylinder): Volume = π × [(Outer Diameter/2)² – (Inner Diameter/2)²] × Length. Since Inner Diameter = Outer Diameter – 2 × Wall Thickness, the formula becomes: Volume = π × [(Outer Diameter/2)² – ((Outer Diameter – 2 × Wall Thickness)/2)²] × Length. This simplifies to: Volume = π × (Outer Diameter – Wall Thickness) × Wall Thickness × Length.
- Angle (L-Shape): Volume = Area of Cross-section × Length. The cross-sectional area of an angle is calculated as: (Leg A × Thickness) + (Leg B × Thickness) – (Thickness × Thickness) if considering the outer dimensions, or more accurately: (Leg A + Leg B – Thickness) * Thickness. For simplicity and common industry practice, we use: Area = (Leg A + Leg B – Thickness) * Thickness.
- Custom (Rectangular Bar): Volume = Width × Height × Length
All dimensions are typically converted to a consistent unit, like millimeters (mm), for calculation.
- Density Determination: The density of aluminium varies slightly depending on its alloy (grade). Common densities used in calculations are:
- Alloy 1100: ~2.71 g/cm³
- Alloy 2014: ~2.80 g/cm³
- Alloy 2024: ~2.78 g/cm³
- Alloy 3003: ~2.73 g/cm³
- Alloy 5052: ~2.68 g/cm³
- Alloy 6061: ~2.70 g/cm³
- Alloy 6063: ~2.70 g/cm³
- Alloy 7075: ~2.81 g/cm³
The calculator uses these standard values. Note that density is often given in g/cm³ or kg/m³. We convert units as needed.
- Unit Conversion: Since dimensions are input in millimeters (mm), the volume is calculated in cubic millimeters (mm³). Densities are typically in grams per cubic centimeter (g/cm³). To get the final weight in kilograms (kg), we perform the following conversion:
Weight (kg) = [Volume (mm³) × Density (g/cm³)] / 1,000,000
(Because 1 cm³ = 1000 mm³, and 1 kg = 1,000,000 g/mm³).
Variables Table:
Key Variables in Aluminium Weight Calculation
| Variable |
Meaning |
Unit |
Typical Range/Values |
| Shape |
Cross-sectional geometry of the aluminium piece |
N/A |
Rod, Sheet, Tube, Angle, Custom Bar |
| Dimensions |
Measurements defining the shape (e.g., Diameter, Width, Length, Thickness) |
Millimeters (mm) |
Varies based on shape and application (e.g., 1mm to 1000mm+) |
| Aluminium Grade |
Specific alloy designation (e.g., 6061, 7075) |
N/A |
Common alloys like 1100, 5052, 6061, 7075 |
| Density |
Mass per unit volume of the specific aluminium grade |
g/cm³ |
Approx. 2.68 to 2.81 g/cm³ |
| Volume |
The amount of space the aluminium occupies |
Cubic Millimeters (mm³) |
Calculated based on dimensions and shape |
| Weight |
The mass of the aluminium piece |
Kilograms (kg) |
Calculated result |
Practical Examples (Real-World Use Cases)
Here are a couple of scenarios illustrating how the Aluminium Weight Calculator India is used:
Example 1: Calculating Weight for a Custom Project
Scenario: A small fabrication workshop in Delhi needs to quote a job for custom aluminium brackets. They need to determine the weight of 50 pieces of a specific rectangular aluminium bar.
Inputs:
- Shape: Custom (Rectangular Bar)
- Width: 30 mm
- Height: 10 mm
- Length: 250 mm
- Aluminium Grade: 6061
- Quantity: 50 pieces
Calculation Steps (as performed by the calculator):
- Volume per piece = 30 mm × 10 mm × 250 mm = 75,000 mm³
- Density for Grade 6061 = 2.70 g/cm³
- Weight per piece (kg) = (75,000 mm³ × 2.70 g/cm³) / 1,000,000 = 0.2025 kg
- Total Weight = 0.2025 kg/piece × 50 pieces = 10.125 kg
Calculator Output:
- Volume: 75,000 mm³
- Density: 2.70 g/cm³
- Material Used (per piece): 75,000 mm³
- Main Result (Total Weight): 10.13 kg (rounded)
Financial Interpretation: The workshop can now accurately estimate the cost of the raw aluminium needed (10.13 kg of 6061 grade) and factor this into their quote, ensuring profitability.
Example 2: Ordering Aluminium Sheets for Signage
Scenario: An advertising company in Mumbai needs to order aluminium sheets for a large outdoor signage project. They need to know the total weight to arrange for transportation.
Inputs:
- Shape: Sheet/Plate
- Width: 1200 mm
- Length: 2400 mm
- Thickness: 3 mm
- Aluminium Grade: 5052
- Quantity: 10 sheets
Calculation Steps:
- Volume per sheet = 1200 mm × 2400 mm × 3 mm = 8,640,000 mm³
- Density for Grade 5052 = 2.68 g/cm³
- Weight per sheet (kg) = (8,640,000 mm³ × 2.68 g/cm³) / 1,000,000 = 23.16 kg
- Total Weight = 23.16 kg/sheet × 10 sheets = 231.6 kg
Calculator Output:
- Volume: 8,640,000 mm³
- Density: 2.68 g/cm³
- Material Used (per sheet): 8,640,000 mm³
- Main Result (Total Weight): 231.6 kg
Logistical Interpretation: Knowing the total weight is 231.6 kg allows the company to book appropriate transport, estimate delivery times, and ensure safe handling of the materials upon arrival.
How to Use This Aluminium Weight Calculator India
Using the Aluminium Weight Calculator is straightforward. Follow these simple steps:
- Select Shape: Choose the correct shape of your aluminium component from the dropdown menu (Rod, Sheet, Tube, Angle, or Custom Bar).
- Enter Dimensions: Based on the selected shape, relevant input fields will appear. Enter the precise measurements (Diameter, Width, Length, Thickness, etc.) in millimeters (mm). Ensure accuracy for reliable results.
- Choose Grade: Select the specific grade of aluminium you are using from the dropdown list. This is crucial as different grades have different densities.
- Calculate: Click the "Calculate Weight" button.
How to Read Results:
- Main Result (Highlighted): This displays the total calculated weight of the aluminium in kilograms (kg).
- Volume: Shows the calculated volume of the aluminium piece in cubic millimeters (mm³).
- Density: Displays the density (in g/cm³) corresponding to the selected aluminium grade.
- Material Used: Indicates the volume of material in mm³ (useful for understanding material consumption).
- Formula Explanation: Provides a brief overview of the calculation method.
Decision-Making Guidance:
- Procurement: Use the calculated weight to order the exact amount of aluminium needed, preventing waste and unnecessary costs.
- Quoting: Factor the material weight into your pricing for custom fabrication jobs.
- Logistics: Plan transportation and handling based on the accurate weight.
- Design: Verify if the component's weight aligns with design specifications.
Use the "Reset" button to clear all fields and start over. The "Copy Results" button allows you to easily transfer the calculated weight, volume, density, and material used to other documents or applications.
Key Factors That Affect Aluminium Weight Results
While the calculator provides a precise result based on inputs, several real-world factors can influence the actual weight or the accuracy of the calculation:
- Aluminium Grade (Alloy): As mentioned, different alloys have varying densities. Using the correct grade is vital. For instance, 7075 aluminium is denser than 5052.
- Dimensional Tolerances: Manufacturing processes have tolerances. Actual dimensions might slightly deviate from the nominal values entered. This can lead to minor variations in weight. Our calculator assumes exact dimensions.
- Surface Treatments & Coatings: Processes like anodizing or powder coating add a thin layer to the aluminium's surface. While usually minimal, this can slightly increase the overall weight, especially for smaller, lighter parts.
- Hollow Sections vs. Solid: For tubes and pipes, the accuracy of the wall thickness measurement is critical. Even small errors here significantly impact the calculated weight due to the removed internal volume.
- Internal Structures: Some extruded profiles might have complex internal structures not perfectly represented by basic shapes like tubes or angles. The calculator uses standard geometric formulas.
- Temperature Effects: Aluminium, like most materials, expands and contracts with temperature. Density changes slightly with temperature. However, for typical industrial calculations, standard room-temperature densities are used and are sufficiently accurate.
- Impurities/Variations in Raw Material: While grades specify compositions, slight variations in the raw aluminium feedstock could theoretically lead to minor density differences not captured by standard grade values.
- Measurement Accuracy: The accuracy of the input dimensions directly impacts the output. Ensure measurements are taken carefully using appropriate tools.
Frequently Asked Questions (FAQ)
What is the standard density of aluminium used in India?
The density of aluminium varies by grade. Common grades used in India, like 6061 or 6063, have a density of approximately 2.70 g/cm³. High-strength alloys like 7075 might be around 2.81 g/cm³, while softer alloys like 5052 might be around 2.68 g/cm³. Our calculator uses grade-specific densities.
Can I calculate the weight for custom shapes?
This calculator supports common shapes like rods, sheets, tubes, angles, and rectangular bars. For highly complex custom profiles, you might need to break them down into simpler geometric components or use specialized CAD software for volume calculation.
What units does the calculator use?
Input dimensions should be in millimeters (mm). The calculator outputs the weight in kilograms (kg), volume in cubic millimeters (mm³), and density in grams per cubic centimeter (g/cm³).
Does the calculator account for hollow sections like pipes?
Yes, the "Tube/Pipe" option calculates the weight of hollow sections by subtracting the volume of the inner hollow space from the volume of the outer cylinder, based on the outer diameter and wall thickness provided.
How accurate is the aluminium weight calculation?
The calculation is highly accurate based on the provided dimensions, shape, and standard density values for the selected grade. Real-world variations might occur due to manufacturing tolerances and surface treatments, as discussed in the "Key Factors" section.
What is the difference between weight and mass?
Technically, mass is the amount of matter in an object, while weight is the force of gravity acting on that mass. In everyday and most industrial contexts, especially when using units like kilograms, we often use "weight" interchangeably with "mass". This calculator provides the mass in kilograms.
Can I calculate the weight of aluminium scrap?
This calculator is designed for specific shapes and dimensions. For scrap, which is irregular, you would typically weigh it directly or estimate based on volume and a general scrap density factor, which is less precise than using this tool for defined components.
Why is selecting the Aluminium Grade important?
Different aluminium alloys have different compositions, affecting their physical properties, including density. For example, 7075 is denser than 5052. Using the correct grade ensures the most accurate weight calculation, which is critical for cost and material management.
Weight vs. Length for Different Aluminium Grades (Sheet Example)
Chart showing how the weight of a standard aluminium sheet (1000mm x 500mm x 5mm) varies with different aluminium grades.
Related Tools and Internal Resources
var currentShapeInputs = 'rod-inputs';
var defaultDensities = {
'1100': 2.71, '2014': 2.80, '2024': 2.78, '3003': 2.73,
'5052': 2.68, '6061': 2.70, '6063': 2.70, '7075': 2.81
};
function updateInputFields() {
var selectedShape = document.getElementById('shape').value;
var shapeInputDivs = document.getElementsByClassName('shape-inputs');
for (var i = 0; i < shapeInputDivs.length; i++) {
shapeInputDivs[i].style.display = 'none';
}
var newShapeInputId = selectedShape + '-inputs';
document.getElementById(newShapeInputId).style.display = 'block';
currentShapeInputs = newShapeInputId;
clearAllErrors();
calculateWeight(); // Recalculate on shape change
}
function getInputValue(id) {
var element = document.getElementById(id);
if (!element) return null;
var value = parseFloat(element.value);
return isNaN(value) ? null : value;
}
function setErrorMessage(id, message) {
var errorElement = document.getElementById(id + 'Error');
if (errorElement) {
errorElement.innerText = message;
errorElement.style.display = message ? 'block' : 'none';
}
}
function clearAllErrors() {
var errorElements = document.querySelectorAll('.error-message');
for (var i = 0; i < errorElements.length; i++) {
errorElements[i].innerText = '';
errorElements[i].style.display = 'none';
}
}
function validateInputs() {
var isValid = true;
var shape = document.getElementById('shape').value;
var inputsToValidate = [];
if (shape === 'rod') {
inputsToValidate = ['rodDiameter', 'rodLength'];
} else if (shape === 'sheet') {
inputsToValidate = ['sheetWidth', 'sheetLength', 'sheetThickness'];
} else if (shape === 'tube') {
inputsToValidate = ['tubeOuterDiameter', 'tubeWallThickness', 'tubeLength'];
} else if (shape === 'angle') {
inputsToValidate = ['angleLegA', 'angleLegB', 'angleThickness', 'angleLength'];
} else if (shape === 'custom') {
inputsToValidate = ['customWidth', 'customHeight', 'customLength'];
}
for (var i = 0; i < inputsToValidate.length; i++) {
var id = inputsToValidate[i];
var value = getInputValue(id);
if (value === null) {
setErrorMessage(id, 'Please enter a valid number.');
isValid = false;
} else if (value = outerDiameter / 2) {
setErrorMessage(id, 'Wall thickness must be less than half the outer diameter.');
isValid = false;
}
} else if (id === 'angleThickness' && shape === 'angle') {
var legA = getInputValue('angleLegA');
var legB = getInputValue('angleLegB');
if (legA !== null && value >= legA) {
setErrorMessage(id, 'Thickness must be less than Leg A.');
isValid = false;
}
if (legB !== null && value >= legB) {
setErrorMessage(id, 'Thickness must be less than Leg B.');
isValid = false;
}
}
}
return isValid;
}
function calculateWeight() {
if (!validateInputs()) {
document.getElementById('main-result').innerText = '– kg';
document.getElementById('volume-result').innerText = '–';
document.getElementById('density-result').innerText = '–';
document.getElementById('material-used').innerText = '–';
updateChart([], []); // Clear chart
return;
}
var shape = document.getElementById('shape').value;
var grade = document.getElementById('aluminiumGrade').value;
var density = defaultDensities[grade];
var volume_mm3 = 0;
var material_used_mm3 = 0; // Same as volume for solid shapes
if (shape === 'rod') {
var diameter = getInputValue('rodDiameter');
var length = getInputValue('rodLength');
var radius = diameter / 2;
volume_mm3 = Math.PI * Math.pow(radius, 2) * length;
} else if (shape === 'sheet') {
var width = getInputValue('sheetWidth');
var length = getInputValue('sheetLength');
var thickness = getInputValue('sheetThickness');
volume_mm3 = width * length * thickness;
} else if (shape === 'tube') {
var outerDiameter = getInputValue('tubeOuterDiameter');
var wallThickness = getInputValue('tubeWallThickness');
var length = getInputValue('tubeLength');
var innerDiameter = outerDiameter – (2 * wallThickness);
if (innerDiameter < 0) innerDiameter = 0; // Ensure non-negative inner diameter
var outerRadius = outerDiameter / 2;
var innerRadius = innerDiameter / 2;
volume_mm3 = Math.PI * (Math.pow(outerRadius, 2) – Math.pow(innerRadius, 2)) * length;
} else if (shape === 'angle') {
var legA = getInputValue('angleLegA');
var legB = getInputValue('angleLegB');
var thickness = getInputValue('angleThickness');
var length = getInputValue('angleLength');
// Area = (Leg A + Leg B – Thickness) * Thickness
var crossSectionalArea = (legA + legB – thickness) * thickness;
volume_mm3 = crossSectionalArea * length;
} else if (shape === 'custom') {
var width = getInputValue('customWidth');
var height = getInputValue('customHeight');
var length = getInputValue('customLength');
volume_mm3 = width * height * length;
}
// Convert volume from mm³ to cm³ for density calculation
var volume_cm3 = volume_mm3 / 1000;
// Calculate weight in kg
var weight_kg = (volume_cm3 * density);
// Update results display
document.getElementById('main-result').innerText = weight_kg.toFixed(3) + ' kg';
document.getElementById('volume-result').innerText = volume_mm3.toFixed(2);
document.getElementById('density-result').innerText = density.toFixed(2);
document.getElementById('material-used').innerText = volume_mm3.toFixed(2); // For solid shapes, this is the same as volume
updateChartData(shape, grade);
}
function resetCalculator() {
document.getElementById('shape').value = 'rod';
document.getElementById('rodDiameter').value = '25';
document.getElementById('rodLength').value = '1000';
document.getElementById('sheetWidth').value = '500';
document.getElementById('sheetLength').value = '1000';
document.getElementById('sheetThickness').value = '5';
document.getElementById('tubeOuterDiameter').value = '50';
document.getElementById('tubeWallThickness').value = '3';
document.getElementById('tubeLength').value = '1000';
document.getElementById('angleLegA').value = '40';
document.getElementById('angleLegB').value = '40';
document.getElementById('angleThickness').value = '4';
document.getElementById('angleLength').value = '1000';
document.getElementById('customWidth').value = '30';
document.getElementById('customHeight').value = '10';
document.getElementById('customLength').value = '1000';
document.getElementById('aluminiumGrade').value = '6061';
updateInputFields(); // Update visibility and trigger recalculation
clearAllErrors();
calculateWeight();
}
function copyResults() {
var mainResult = document.getElementById('main-result').innerText;
var volume = document.getElementById('volume-result').innerText;
var density = document.getElementById('density-result').innerText;
var materialUsed = document.getElementById('material-used').innerText;
var shape = document.getElementById('shape').value;
var grade = document.getElementById('aluminiumGrade').value;
var resultsText = "Aluminium Weight Calculation Results:\n\n";
resultsText += "Shape: " + shape.toUpperCase() + "\n";
resultsText += "Grade: " + grade + "\n";
resultsText += "————————————\n";
resultsText += "Total Weight: " + mainResult + "\n";
resultsText += "Volume: " + volume + " mm³\n";
resultsText += "Density: " + density + " g/cm³\n";
resultsText += "Material Used: " + materialUsed + " mm³\n";
resultsText += "————————————\n";
resultsText += "Formula: Weight = Volume × Density\n";
try {
navigator.clipboard.writeText(resultsText).then(function() {
alert('Results copied to clipboard!');
}, function(err) {
console.error('Could not copy text: ', err);
alert('Failed to copy results. Please copy manually.');
});
} catch (e) {
console.error('Clipboard API not available: ', e);
alert('Clipboard API not supported. Please copy manually.');
}
}
// Charting Logic
var weightChart;
var chartContext = document.getElementById('weightChart').getContext('2d');
function updateChartData(currentShape, currentGrade) {
var chartData = {
labels: [],
weights: [],
densities: []
};
var gradesToCompare = ['1100', '3003', '5052', '6061', '7075'];
var fixedDimensions = {};
// Define fixed dimensions based on shape for comparison
if (currentShape === 'rod') {
fixedDimensions = { diameter: 25, length: 1000 };
} else if (currentShape === 'sheet') {
fixedDimensions = { width: 1000, length: 500, thickness: 5 };
} else if (currentShape === 'tube') {
fixedDimensions = { outerDiameter: 50, wallThickness: 3, length: 1000 };
} else if (currentShape === 'angle') {
fixedDimensions = { legA: 40, legB: 40, thickness: 4, length: 1000 };
} else if (currentShape === 'custom') {
fixedDimensions = { width: 30, height: 10, length: 1000 };
} else {
return; // No chart data if shape is not suitable for comparison
}
gradesToCompare.forEach(function(grade) {
var density = defaultDensities[grade];
var volume_mm3 = 0;
if (currentShape === 'rod') {
var radius = fixedDimensions.diameter / 2;
volume_mm3 = Math.PI * Math.pow(radius, 2) * fixedDimensions.length;
} else if (currentShape === 'sheet') {
volume_mm3 = fixedDimensions.width * fixedDimensions.length * fixedDimensions.thickness;
} else if (currentShape === 'tube') {
var outerDiameter = fixedDimensions.outerDiameter;
var wallThickness = fixedDimensions.wallThickness;
var length = fixedDimensions.length;
var innerDiameter = outerDiameter – (2 * wallThickness);
if (innerDiameter < 0) innerDiameter = 0;
var outerRadius = outerDiameter / 2;
var innerRadius = innerDiameter / 2;
volume_mm3 = Math.PI * (Math.pow(outerRadius, 2) – Math.pow(innerRadius, 2)) * length;
} else if (currentShape === 'angle') {
var legA = fixedDimensions.legA;
var legB = fixedDimensions.legB;
var thickness = fixedDimensions.thickness;
var length = fixedDimensions.length;
var crossSectionalArea = (legA + legB – thickness) * thickness;
volume_mm3 = crossSectionalArea * length;
} else if (currentShape === 'custom') {
volume_mm3 = fixedDimensions.width * fixedDimensions.height * fixedDimensions.length;
}
var volume_cm3 = volume_mm3 / 1000;
var weight_kg = (volume_cm3 * density);
chartData.labels.push(grade);
chartData.weights.push(weight_kg);
chartData.densities.push(density);
});
updateChart(chartData.labels, chartData.weights, chartData.densities);
}
function updateChart(labels, weights, densities) {
if (weightChart) {
weightChart.destroy();
}
if (labels.length === 0) return; // Don't draw if no data
weightChart = new Chart(chartContext, {
type: 'bar',
data: {
labels: labels,
datasets: [{
label: 'Weight (kg)',
data: weights,
backgroundColor: 'rgba(0, 74, 153, 0.6)', // Primary color
borderColor: 'rgba(0, 74, 153, 1)',
borderWidth: 1
}, {
label: 'Density (g/cm³)',
data: densities,
backgroundColor: 'rgba(40, 167, 69, 0.6)', // Success color
borderColor: 'rgba(40, 167, 69, 1)',
borderWidth: 1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
scales: {
y: {
beginAtZero: true,
title: {
display: true,
text: 'Value'
}
},
x: {
title: {
display: true,
text: 'Aluminium Grade'
}
}
},
plugins: {
tooltip: {
callbacks: {
label: function(context) {
var label = context.dataset.label || '';
if (label) {
label += ': ';
}
if (context.parsed.y !== null) {
label += context.parsed.y.toFixed(2) + (label.includes('Weight') ? ' kg' : ' g/cm³');
}
return label;
}
}
}
}
}
});
}
// Initialize calculator state and chart
document.addEventListener('DOMContentLoaded', function() {
updateInputFields(); // Set initial visibility
calculateWeight(); // Calculate initial values
// Initial chart update based on default shape/grade
var initialShape = document.getElementById('shape').value;
var initialGrade = document.getElementById('aluminiumGrade').value;
updateChartData(initialShape, initialGrade);
// Add event listeners for all number inputs to trigger calculation on change
var numberInputs = document.querySelectorAll('.calculator-section input[type="number"]');
for (var i = 0; i < numberInputs.length; i++) {
numberInputs[i].addEventListener('input', calculateWeight);
}
// FAQ toggle functionality
var faqQuestions = document.querySelectorAll('.faq-question');
for (var i = 0; i < faqQuestions.length; i++) {
faqQuestions[i].addEventListener('click', function() {
this.classList.toggle('active');
var answer = this.nextElementSibling;
if (answer.style.display === 'block') {
answer.style.display = 'none';
} else {
answer.style.display = 'block';
}
});
}
});
<!– Example CDN: –>