Metal Weights Calculator: Precise Calculations Online
Calculate the weight of metal objects with ease. This tool is essential for anyone working with metals, from DIY enthusiasts to industrial professionals. Get accurate weight estimations for various shapes and materials.
Metal Weight Calculator
— Please Select —
Steel
Aluminum
Copper
Brass
Iron
Lead
Zinc
Nickel
Titanium
Gold
Silver
Choose the specific metal for accurate density.
Enter the density of the metal in kilograms per cubic meter (kg/m³).
— Please Select —
Cube
Rectangular Prism
Cylinder
Sphere
Sheet
Rod
Choose the geometric shape of the metal piece.
Calculation Results
—
Volume: — m³
Density Used: — kg/m³
Shape Area: — m²
Metal: —
Shape: —
Formula Used: Weight = Volume × Density
{primary_keyword}
{primary_keyword} is a specialized online tool designed to accurately determine the mass or weight of metal objects based on their dimensions and material properties. It leverages known densities of various metals and standard geometric formulas to provide precise weight estimations. This calculator is invaluable for a wide range of users, including engineers, manufacturers, fabricators, machinists, welders, artists, and even hobbyists involved in metalworking projects.
Anyone who needs to quantify the amount of metal they are using, costing materials for a project, verifying shipments, or ensuring structural integrity can benefit from a reliable {primary_keyword}. It simplifies complex calculations that would otherwise require manual application of geometry and material science principles.
A common misconception about metal weight calculations is that all metals of the same volume weigh the same. This is incorrect due to the wide variation in metal densities. For instance, a cubic meter of lead is significantly heavier than a cubic meter of aluminum. Another misunderstanding is the assumption of uniform material properties; real-world metal stock can have slight variations. Our calculator uses standard, accepted density values, providing a highly accurate estimate for most practical applications.
{primary_keyword} Formula and Mathematical Explanation
The core of the {primary_keyword} relies on a fundamental physics principle: the relationship between mass, volume, and density.
The Main Formula
The primary formula used is:
Weight (Mass) = Volume × Density
Where:
Weight (Mass): The quantity of matter in the object, typically measured in kilograms (kg).
Volume: The amount of three-dimensional space the object occupies, measured in cubic meters (m³).
Density: The mass of the substance per unit volume, measured in kilograms per cubic meter (kg/m³).
Step-by-Step Calculation Process:
Metal Selection & Density Lookup: The user selects the metal type from a predefined list. The calculator retrieves the standard density value associated with that metal. If a custom density is provided, that value is used.
Shape Identification: The user chooses the geometric shape of the metal piece (e.g., Cube, Cylinder, Sheet).
Dimension Input: The user inputs the relevant dimensions (length, width, height, diameter, radius, thickness) according to the selected shape. All dimensions should be in consistent units (e.g., meters or millimeters, which are then converted to meters).
Volume Calculation: Based on the selected shape and input dimensions, the calculator computes the object's volume using the appropriate geometric formula.
Weight Calculation: Finally, the calculator multiplies the calculated volume by the metal's density to determine the total weight.
Variables Table:
Key Variables in Metal Weight Calculation
Variable
Meaning
Unit
Typical Range/Notes
Metal Type
The specific metal being used (e.g., Steel, Aluminum).
Used for rectangular prisms, sheets; positive value required.
Height (H)
Linear dimension of the object.
meters (m)
Used for prisms, cylinders; positive value required.
Diameter (D)
Diameter of a circular base or sphere.
meters (m)
Used for cylinders, spheres, rods; positive value required.
Radius (R)
Radius of a circular base or sphere.
meters (m)
Used for cylinders, spheres, rods; positive value required (R = D/2).
Thickness (T)
The depth of a sheet or plate.
meters (m)
Used for sheets; positive value required.
Volume (V)
The space occupied by the object.
m³
Calculated based on shape and dimensions.
Weight (Mass)
The total mass of the object.
kilograms (kg)
Calculated (V × ρ); primary output.
Practical Examples (Real-World Use Cases)
Understanding the {primary_keyword} in action helps illustrate its utility:
Example 1: Steel Plate for Fabrication
A metal fabricator needs to determine the weight of a steel plate for a structural project. The plate measures 2 meters in length, 1 meter in width, and has a thickness of 0.01 meters (10 mm).
Inputs:
Metal Type: Steel
Density: 7850 kg/m³
Shape: Sheet
Length: 2 m
Width: 1 m
Thickness: 0.01 m
Calculations:
Volume = Length × Width × Thickness = 2 m × 1 m × 0.01 m = 0.02 m³
Weight = Volume × Density = 0.02 m³ × 7850 kg/m³ = 157 kg
Outputs:
Primary Result (Weight): 157 kg
Volume: 0.02 m³
Density Used: 7850 kg/m³
Shape Area: 2 m²
Interpretation: The fabricator knows that this specific steel plate weighs 157 kg. This information is crucial for logistics (transportation costs), material handling (lifting equipment needed), and cost estimation for the project. This accurate weight calculation helps prevent under or overestimation of material needs.
Example 2: Solid Copper Rod for Electrical Conductivity
An electrical engineer requires a solid copper rod with a diameter of 0.05 meters (50 mm) and a length of 1.5 meters for a specialized application. They need to know its weight.
Inputs:
Metal Type: Copper
Density: 8960 kg/m³
Shape: Rod (Cylinder)
Diameter: 0.05 m
Length: 1.5 m
Calculations:
Radius (R) = Diameter / 2 = 0.05 m / 2 = 0.025 m
Volume = π × R² × Length = π × (0.025 m)² × 1.5 m ≈ 3.14159 × 0.000625 m² × 1.5 m ≈ 0.002945 m³
Weight = Volume × Density ≈ 0.002945 m³ × 8960 kg/m³ ≈ 26.39 kg
Outputs:
Primary Result (Weight): Approximately 26.39 kg
Volume: Approximately 0.002945 m³
Density Used: 8960 kg/m³
Shape Area (Base): Approximately 0.001963 m²
Interpretation: The engineer confirms the copper rod weighs approximately 26.39 kg. This is important for understanding the physical properties of the component, ensuring it fits within design constraints, and calculating overall system weight. This precise {primary_keyword} use is critical for accurate engineering designs.
How to Use This {primary_keyword} Calculator
Using our online {primary_keyword} is straightforward:
Step 1: Select Metal Type. Choose your metal from the 'Select Metal Type' dropdown. If your specific alloy isn't listed, you can input its density manually in the 'Density' field.
Step 2: Enter Density (if custom). If you selected a metal from the list, its standard density will auto-populate. You can override this if you know the exact density of your material. Ensure the unit is kg/m³.
Step 3: Select Shape. Choose the geometric shape of your metal piece from the 'Select Shape' dropdown.
Step 4: Input Dimensions. Based on the selected shape, relevant input fields for dimensions (e.g., Length, Width, Thickness, Diameter) will appear. Enter these values carefully, preferably in meters for direct calculation in m³ and kg. If you use other units (like mm or cm), ensure you convert them to meters before entering or note the conversion factor.
Step 5: Calculate. Click the 'Calculate Weight' button.
Reading the Results:
Primary Result (Weight): This is the main output, showing the calculated weight of your metal object in kilograms (kg).
Volume: Displays the calculated volume of the object in cubic meters (m³).
Density Used: Confirms the density value used in the calculation (either default or custom).
Shape Area: Shows the relevant area calculation for the shape (e.g., base area for a cylinder, surface area for a sheet).
Metal & Shape: Confirms the inputs chosen for metal type and object shape.
Decision-Making Guidance:
Use the results to:
Cost Estimation: Compare the calculated weight against the price per kilogram of the metal to estimate project costs. Consult metal pricing guides for current market rates.
Logistics Planning: Determine transportation needs and costs based on the total weight.
Material Procurement: Ensure you order the correct amount of material, avoiding shortages or excess.
Structural Analysis: Verify if the weight of metal components fits within the design limits of a structure or machine.
The 'Copy Results' button allows you to easily transfer the primary result, intermediate values, and key assumptions for use in reports or other documents. Use the 'Reset' button to clear all fields and start a new calculation.
Key Factors That Affect {primary_keyword} Results
While the calculator provides precise results based on input, several real-world factors can influence the actual weight:
Material Purity and Alloying: The calculated densities are standard values. Actual metal alloys might have slightly different densities due to the addition of other elements. For example, different grades of stainless steel have varying compositions and thus densities. Always use the specific density for your exact alloy if known.
Manufacturing Tolerances: Metal products are rarely manufactured to exact theoretical dimensions. Slight variations in length, width, diameter, or thickness are common due to manufacturing tolerances. These small deviations can accumulate and affect the final weight, especially for large or numerous parts.
Internal Structures (Voids/Holes): The calculator assumes solid, homogenous metal. If the metal piece has internal voids, hollow sections, or complex internal structures not accounted for by the basic shape, the actual weight will be lower than calculated. Specialized calculations or CAD software might be needed for such complex geometries.
Temperature Fluctuations: Metals expand when heated and contract when cooled. While this effect is usually minor for weight calculations at ambient temperatures, significant temperature variations in industrial processes could slightly alter the volume and, consequently, the density and perceived weight.
Surface Treatments and Coatings: Plating, galvanizing, or painting adds a layer of material to the metal object. This coating contributes to the overall weight. If the coating's weight is significant, it should be calculated separately and added to the base metal weight.
Measurement Accuracy: The precision of the input dimensions directly impacts the accuracy of the calculated weight. Inaccurate measurements of length, width, or diameter will lead to an incorrect volume and weight estimation. Always double-check your measurements.
Frequently Asked Questions (FAQ)
What is the standard unit for density in this calculator?
The calculator expects density in kilograms per cubic meter (kg/m³). This is a standard SI unit for density.
What if my metal isn't listed?
If your specific metal or alloy is not in the dropdown list, you can enter its known density directly into the 'Density (kg/m³)' input field. You'll need to find this value from a reliable material data sheet or engineering reference.
Can I input dimensions in millimeters or inches?
The calculator works best with dimensions in meters (m) to ensure the volume is calculated in cubic meters (m³). If you use millimeters (mm), divide your value by 1000 (e.g., 50 mm = 0.05 m). If you use inches, multiply by 0.0254 to convert to meters. Ensure consistency across all dimension inputs.
How accurate is the calculator?
The calculator is highly accurate based on the provided inputs and standard density values. The accuracy of the result depends entirely on the accuracy of the density data and the dimensions you input. Real-world factors like manufacturing tolerances and material variations might lead to slight discrepancies.
Does the calculator account for hollow shapes?
No, the calculator assumes solid shapes based on the selected geometry (e.g., a solid cube, a solid cylinder). For hollow objects, you would need to calculate the volume of the material used (outer volume minus inner volume) and then calculate the weight.
What is the difference between weight and mass?
In everyday terms and for most practical engineering purposes on Earth, 'weight' and 'mass' are used interchangeably. Technically, mass is the amount of matter, while weight is the force of gravity acting on that mass. This calculator outputs mass in kilograms (kg), which is commonly referred to as weight.
Can I calculate the weight of multiple metal pieces at once?
This calculator is designed for a single metal piece per calculation. To find the total weight of multiple identical pieces, calculate the weight of one piece and multiply it by the number of pieces. For different pieces, perform separate calculations.
Where can I find reliable density data for various metals and alloys?
Reliable density data can typically be found in engineering handbooks, material science databases, manufacturer specifications, and reputable online technical resources. Always try to find data specific to the exact alloy you are working with.
How do I calculate the weight of a metal sheet with rounded corners?
For sheets with rounded corners, a precise calculation can be complex. You might approximate by calculating the weight of the main rectangular area and adding the weight of the cylindrical sections forming the rounded corners, or by using software like CAD for more exact volume computation. Our calculator handles standard shapes efficiently.
Related Tools and Internal Resources
Density Converter Tool: Convert density values between various units (e.g., g/cm³ to kg/m³) easily.
Metal Price Tracker: Stay updated with the latest market prices for common metals like steel, copper, and aluminum.
Material Properties Database: Access a comprehensive database of physical and mechanical properties for a wide range of materials.
Volume Calculator: Calculate volumes for a broad spectrum of geometric shapes, which can be a helpful step before using the weight calculator.
Sheet Metal Calculator: A specialized tool focused on calculations specific to sheet metal fabrication, including gauge conversions and bend allowances.
Custom Metal Fabrication Guide: Learn about the processes and considerations involved in custom metal fabrication projects.
var metalDensities = {
"Steel": 7850,
"Aluminum": 2700,
"Copper": 8960,
"Brass": 8500,
"Iron": 7874,
"Lead": 11340,
"Zinc": 7134,
"Nickel": 8908,
"Titanium": 4500,
"Gold": 19320,
"Silver": 10490
};
var shapeFormulas = {
"cube": {
inputs: [
{ id: "length", label: "Side Length (m)", placeholder: "e.g., 1" }
],
calculateVolume: function(inputs) {
var side = parseFloat(inputs.length);
if (isNaN(side) || side <= 0) return null;
return Math.pow(side, 3);
},
calculateArea: function(inputs) {
var side = parseFloat(inputs.length);
if (isNaN(side) || side <= 0) return null;
return Math.pow(side, 2); // Area of one face
}
},
"rectangular_prism": {
inputs: [
{ id: "length", label: "Length (m)", placeholder: "e.g., 2" },
{ id: "width", label: "Width (m)", placeholder: "e.g., 1" },
{ id: "height", label: "Height (m)", placeholder: "e.g., 0.5" }
],
calculateVolume: function(inputs) {
var length = parseFloat(inputs.length);
var width = parseFloat(inputs.width);
var height = parseFloat(inputs.height);
if (isNaN(length) || length <= 0 || isNaN(width) || width <= 0 || isNaN(height) || height <= 0) return null;
return length * width * height;
},
calculateArea: function(inputs) {
var length = parseFloat(inputs.length);
var width = parseFloat(inputs.width);
var height = parseFloat(inputs.height);
if (isNaN(length) || length <= 0 || isNaN(width) || width <= 0 || isNaN(height) || height <= 0) return null;
return length * width; // Area of the base
}
},
"cylinder": {
inputs: [
{ id: "diameter", label: "Diameter (m)", placeholder: "e.g., 0.5" },
{ id: "height", label: "Height/Length (m)", placeholder: "e.g., 1" }
],
calculateVolume: function(inputs) {
var diameter = parseFloat(inputs.diameter);
var height = parseFloat(inputs.height);
if (isNaN(diameter) || diameter <= 0 || isNaN(height) || height <= 0) return null;
var radius = diameter / 2;
return Math.PI * Math.pow(radius, 2) * height;
},
calculateArea: function(inputs) {
var diameter = parseFloat(inputs.diameter);
if (isNaN(diameter) || diameter <= 0) return null;
var radius = diameter / 2;
return Math.PI * Math.pow(radius, 2); // Area of the base
}
},
"sphere": {
inputs: [
{ id: "diameter", label: "Diameter (m)", placeholder: "e.g., 1" }
],
calculateVolume: function(inputs) {
var diameter = parseFloat(inputs.diameter);
if (isNaN(diameter) || diameter <= 0) return null;
var radius = diameter / 2;
return (4/3) * Math.PI * Math.pow(radius, 3);
},
calculateArea: function(inputs) {
var diameter = parseFloat(inputs.diameter);
if (isNaN(diameter) || diameter <= 0) return null;
var radius = diameter / 2;
return 4 * Math.PI * Math.pow(radius, 2); // Surface area
}
},
"sheet": {
inputs: [
{ id: "length", label: "Length (m)", placeholder: "e.g., 2" },
{ id: "width", label: "Width (m)", placeholder: "e.g., 1" },
{ id: "thickness", label: "Thickness (m)", placeholder: "e.g., 0.01" }
],
calculateVolume: function(inputs) {
var length = parseFloat(inputs.length);
var width = parseFloat(inputs.width);
var thickness = parseFloat(inputs.thickness);
if (isNaN(length) || length <= 0 || isNaN(width) || width <= 0 || isNaN(thickness) || thickness <= 0) return null;
return length * width * thickness;
},
calculateArea: function(inputs) {
var length = parseFloat(inputs.length);
var width = parseFloat(inputs.width);
if (isNaN(length) || length <= 0 || isNaN(width) || width <= 0) return null;
return length * width; // Area of the sheet surface
}
},
"rod": {
inputs: [
{ id: "diameter", label: "Diameter (m)", placeholder: "e.g., 0.05" },
{ id: "length", label: "Length (m)", placeholder: "e.g., 1.5" }
],
calculateVolume: function(inputs) {
var diameter = parseFloat(inputs.diameter);
var length = parseFloat(inputs.length);
if (isNaN(diameter) || diameter <= 0 || isNaN(length) || length <= 0) return null;
var radius = diameter / 2;
return Math.PI * Math.pow(radius, 2) * length;
},
calculateArea: function(inputs) {
var diameter = parseFloat(inputs.diameter);
if (isNaN(diameter) || diameter <= 0) return null;
var radius = diameter / 2;
return Math.PI * Math.pow(radius, 2); // Area of the circular cross-section
}
}
};
function setupShapeInputs() {
var shapeSelect = document.getElementById('shape');
var dimensionsDiv = document.getElementById('dimensions');
var selectedShape = shapeSelect.value;
dimensionsDiv.innerHTML = ''; // Clear previous inputs
if (selectedShape && shapeFormulas[selectedShape]) {
var formula = shapeFormulas[selectedShape];
formula.inputs.forEach(function(inputInfo) {
var inputGroup = document.createElement('div');
inputGroup.className = 'input-group';
var label = document.createElement('label');
label.htmlFor = inputInfo.id;
label.textContent = inputInfo.label;
var input = document.createElement('input');
input.type = 'number';
input.id = inputInfo.id;
input.placeholder = inputInfo.placeholder;
input.min = "0.0001"; // Prevent zero or negative dimensions
input.step = "any";
input.addEventListener('input', calculateWeight); // Recalculate on input
var small = document.createElement('small');
small.textContent = "Enter the dimension in meters.";
var errorDiv = document.createElement('div');
errorDiv.className = 'error-message';
errorDiv.id = inputInfo.id + 'Error';
inputGroup.appendChild(label);
inputGroup.appendChild(input);
inputGroup.appendChild(small);
inputGroup.appendChild(errorDiv);
dimensionsDiv.appendChild(inputGroup);
});
}
// Clear density error if shape is changed
document.getElementById('densityError').textContent = '';
}
function updateDensity() {
var metalTypeSelect = document.getElementById('metalType');
var densityInput = document.getElementById('density');
var selectedMetal = metalTypeSelect.value;
if (selectedMetal && metalDensities[selectedMetal]) {
densityInput.value = metalDensities[selectedMetal];
document.getElementById('metalAssumed').children[0].textContent = selectedMetal;
document.getElementById('densityUsed').children[0].textContent = metalDensities[selectedMetal] + ' kg/m³';
} else {
densityInput.value = '';
document.getElementById('metalAssumed').children[0].textContent = '–';
document.getElementById('densityUsed').children[0].textContent = '–';
}
calculateWeight();
}
function validateInputs() {
var errors = {};
var metalType = document.getElementById('metalType').value;
var density = document.getElementById('density').value;
var shape = document.getElementById('shape').value;
var dimensions = {};
// Metal Type Validation
if (!metalType) {
errors.metalTypeError = "Please select a metal type.";
}
// Density Validation
var densityValue = parseFloat(density);
if (isNaN(densityValue) || densityValue <= 0) {
errors.densityError = "Please enter a valid positive density.";
}
// Shape Validation
if (!shape) {
errors.shapeError = "Please select a shape.";
}
// Dimension Validation
if (shape && shapeFormulas[shape]) {
var formula = shapeFormulas[shape];
formula.inputs.forEach(function(inputInfo) {
var inputElement = document.getElementById(inputInfo.id);
var value = inputElement ? inputElement.value : null;
dimensions[inputInfo.id] = value; // Store for later use
var numValue = parseFloat(value);
var errorId = inputInfo.id + 'Error';
if (value === null || value === '') {
errors[errorId] = "This field is required.";
} else if (isNaN(numValue) || numValue <= 0) {
errors[errorId] = "Please enter a valid positive number.";
}
});
}
// Update error messages on UI
document.getElementById('metalTypeError').textContent = errors.metalTypeError || '';
document.getElementById('densityError').textContent = errors.densityError || '';
document.getElementById('shapeError').textContent = errors.shapeError || '';
for (var key in errors) {
if (key.endsWith('Error') && key !== 'metalTypeError' && key !== 'densityError' && key !== 'shapeError') {
var errorElement = document.getElementById(key);
if (errorElement) {
errorElement.textContent = errors[key];
}
}
}
return { isValid: Object.keys(errors).length === 0, dimensions: dimensions, densityValue: densityValue, shape: shape, metalType: metalType };
}
function calculateWeight() {
var validationResult = validateInputs();
if (!validationResult.isValid) {
// Display results as '–' if invalid
document.getElementById('primary-result').textContent = '–';
document.getElementById('volumeResult').children[0].textContent = '– m³';
document.getElementById('shapeArea').children[0].textContent = '– m²';
document.getElementById('shapeAssumed').children[0].textContent = '–';
return;
}
var density = validationResult.densityValue;
var shape = validationResult.shape;
var dimensions = validationResult.dimensions;
var metalType = validationResult.metalType;
var volume = null;
var area = null;
if (shape && shapeFormulas[shape]) {
volume = shapeFormulas[shape].calculateVolume(dimensions);
area = shapeFormulas[shape].calculateArea(dimensions);
}
if (volume === null) {
document.getElementById('primary-result').textContent = '–';
document.getElementById('volumeResult').children[0].textContent = '– m³';
document.getElementById('shapeArea').children[0].textContent = '– m²';
return;
}
var weight = volume * density;
document.getElementById('primary-result').textContent = weight.toFixed(3) + ' kg';
document.getElementById('volumeResult').children[0].textContent = volume.toFixed(6) + ' m³';
document.getElementById('shapeArea').children[0].textContent = area !== null ? area.toFixed(4) + ' m²' : '– m²';
document.getElementById('shapeAssumed').children[0].textContent = shape.replace('_', ' ').toUpperCase();
document.getElementById('metalAssumed').children[0].textContent = metalType;
document.getElementById('densityUsed').children[0].textContent = density + ' kg/m³';
updateChart(volume, weight, density);
}
function resetCalculator() {
document.getElementById('metalType').value = '';
document.getElementById('density').value = '';
document.getElementById('shape').value = '';
document.getElementById('metalTypeError').textContent = '';
document.getElementById('densityError').textContent = '';
document.getElementById('shapeError').textContent = '';
document.getElementById('dimensions').innerHTML = ''; // Clear dynamic inputs
document.getElementById('primary-result').textContent = '–';
document.getElementById('volumeResult').children[0].textContent = '– m³';
document.getElementById('densityUsed').children[0].textContent = '–';
document.getElementById('shapeArea').children[0].textContent = '– m²';
document.getElementById('metalAssumed').children[0].textContent = '–';
document.getElementById('shapeAssumed').children[0].textContent = '–';
// Reset chart to default state
updateChart(0, 0, 0);
}
function copyResults() {
var primaryResult = document.getElementById('primary-result').textContent;
var volumeResult = document.getElementById('volumeResult').textContent.replace('Volume: ', '').replace(' m³', '');
var densityUsed = document.getElementById('densityUsed').textContent.replace('Density Used: ', '').replace(' kg/m³', '');
var shapeArea = document.getElementById('shapeArea').textContent.replace('Shape Area: ', '').replace(' m²', '');
var metalAssumed = document.getElementById('metalAssumed').textContent.replace('Metal: ', '');
var shapeAssumed = document.getElementById('shapeAssumed').textContent.replace('Shape: ', '');
var resultText = "Metal Weight Calculation Results:\n";
resultText += "———————————-\n";
resultText += "Weight: " + primaryResult + "\n";
resultText += "Volume: " + volumeResult + " m³\n";
resultText += "Density Used: " + densityUsed + " kg/m³\n";
resultText += "Shape Area: " + shapeArea + " m²\n";
resultText += "Metal: " + metalAssumed + "\n";
resultText += "Shape: " + shapeAssumed + "\n";
resultText += "Formula: Weight = Volume × Density\n";
navigator.clipboard.writeText(resultText).then(function() {
var btn = document.getElementById('copyResultsBtn');
var originalText = btn.textContent;
btn.textContent = 'Copied!';
setTimeout(function() {
btn.textContent = originalText;
}, 1500);
}).catch(function(err) {
console.error('Could not copy text: ', err);
var btn = document.getElementById('copyResultsBtn');
btn.textContent = 'Copy Failed';
});
}
function toggleFaq(element) {
var question = element.querySelector('.faq-question');
var answer = element.querySelector('.faq-answer');
question.classList.toggle('active');
if (answer.style.display === "block") {
answer.style.display = "none";
} else {
answer.style.display = "block";
}
}
function initChart() {
var ctx = document.getElementById('weightChart').getContext('2d');
var weightChart = new Chart(ctx, {
type: 'bar', // Use bar chart for weight and density comparison
data: {
labels: ['Volume (m³)', 'Weight (kg)', 'Density (kg/m³)'],
datasets: [{
label: 'Calculated Values',
data: [0, 0, 0],
backgroundColor: [
'rgba(0, 74, 153, 0.5)', // Primary color for Volume
'rgba(40, 167, 69, 0.6)', // Success color for Weight
'rgba(255, 193, 7, 0.6)' // Warning color for Density
],
borderColor: [
'rgba(0, 74, 153, 1)',
'rgba(40, 167, 69, 1)',
'rgba(255, 193, 7, 1)'
],
borderWidth: 1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
scales: {
y: {
beginAtZero: true,
title: {
display: true,
text: 'Value'
}
}
},
plugins: {
title: {
display: true,
text: 'Metal Weight Calculation Breakdown'
},
legend: {
display: false // Hide legend as labels are on the bars
}
}
}
});
return weightChart;
}
function updateChart(volume, weight, density) {
var chart = Chart.getChart('weightChart'); // Get chart instance
if (chart) {
chart.data.datasets[0].data = [volume, weight, density];
chart.update();
}
}
// Initial setup when the page loads
document.addEventListener('DOMContentLoaded', function() {
setupShapeInputs(); // Set up initial dynamic input fields based on default shape (or none)
updateDensity(); // Set initial density based on default metal (or none)
// Initialize Chart
var chartContainer = document.createElement('div');
chartContainer.id = 'chart-container';
chartContainer.innerHTML = '
Calculation Chart
';
document.querySelector('.calculator-wrapper').appendChild(chartContainer); // Append chart container after calculator inputs
// Check if canvas element exists before initializing chart
if(document.getElementById('weightChart')) {
window.myChart = initChart(); // Assign to window for potential global access if needed
} else {
console.error("Canvas element 'weightChart' not found.");
}
document.getElementById('metalType').addEventListener('change', updateDensity);
document.getElementById('shape').addEventListener('change', setupShapeInputs);
document.getElementById('copyResultsBtn').addEventListener('click', copyResults);
// Trigger initial calculation if default values are set
calculateWeight();
});