360 Brass Weight Calculator & Guide
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Calculation Results
Estimated Brass Weight:
— kg
Formula: Weight = Volume × Density. Volume is calculated based on shape and dimensions. Density varies by brass alloy.
Weight vs. Density Comparison
Free Cutting Brass (360)
Naval Brass
Red Brass
Cartridge Brass
Visualizing how density impacts the weight of a standard component (e.g., 1000 cm³).
Component Volume Table
| Shape |
Formula (Volume) |
Units |
| Rod |
π × (Diameter/2)² × Length |
mm³ |
| Tube |
π × (OuterDiameter/2)² × Length – π × (InnerDiameter/2)² × Length |
mm³ |
| Sheet |
Width × Thickness × Length |
mm³ |
| Wire |
π × (Diameter/2)² × Length |
mm³ |
Table showing volume calculation formulas for common brass shapes.
What is the 360 Brass Weight Calculator?
The 360 brass weight calculator is a specialized online tool designed to accurately determine the mass of brass components, particularly focusing on brass alloys like UNS C36000, often referred to as Free Cutting Brass. This calculator simplifies the complex task of estimating the weight of brass parts by taking into account the specific alloy's density and the component's dimensions and shape. Whether you are a manufacturer, engineer, procurement specialist, or hobbyist working with brass, this tool provides a quick and reliable method to ascertain the weight, which is crucial for cost estimation, material ordering, shipping calculations, and structural integrity assessments.
Who should use it?
- Engineers and Designers: To estimate material requirements and costs for new projects.
- Manufacturers: For precise material purchasing, inventory management, and production planning.
- Procurement Specialists: To get accurate quotes and manage budgets for brass materials.
- Machinists: To understand the material yield and potential waste in machining processes.
- Students and Educators: For learning about material properties and practical applications in engineering.
- DIY Enthusiasts: For projects involving custom brass parts.
Common Misconceptions:
- All Brass is the Same: Brass is an alloy, and its composition varies significantly, leading to different densities and properties. The 360 brass weight calculator accounts for this by allowing selection of common brass types.
- Weight is Only About Size: While dimensions are critical, the specific alloy's density is equally important. A larger piece of a less dense brass might weigh less than a smaller piece of a denser brass.
- Calculators are Always Perfect: This calculator provides an estimate based on standard densities. Actual weight can vary slightly due to manufacturing tolerances and minor variations in alloy composition.
360 Brass Weight Calculator Formula and Mathematical Explanation
The fundamental principle behind the 360 brass weight calculator is the relationship between mass, volume, and density. The core formula is straightforward:
Weight = Volume × Density
Let's break down each component:
Variable Explanations
The calculator requires specific inputs to compute the weight. These typically include the shape of the brass component, its dimensions, and the type of brass alloy.
1. Brass Alloy Type and Density
Different brass alloys have distinct compositions, which directly influence their density. For instance, Free Cutting Brass (UNS C36000), commonly used in machining, has a specific density. The calculator uses standard density values for selected alloys. Density is typically measured in grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).
2. Component Shape and Dimensions
The shape and dimensions determine the volume of the brass component. The calculator supports common shapes like rods, tubes, sheets, and wires. For each shape, specific dimensions are needed:
- Rods/Wires: Diameter and Length.
- Tubes: Outer Diameter, Inner Diameter (or Wall Thickness), and Length.
- Sheets: Width, Thickness, and Length.
If a custom volume is provided, this step is bypassed.
3. Volume Calculation
Based on the selected shape and dimensions, the calculator computes the volume. The formulas used are standard geometric formulas:
- Rod/Wire Volume: V = π × (radius)² × Length
- Tube Volume: V = π × (Outer Radius² – Inner Radius²) × Length
- Sheet Volume: V = Width × Thickness × Length
Dimensions are usually entered in millimeters (mm), and the resulting volume is calculated in cubic millimeters (mm³). This is then converted to cubic centimeters (cm³) for consistency with density units.
4. Weight Calculation
Once the volume (in cm³) and density (in g/cm³) are known, the weight is calculated. The result is typically in grams, which is then converted to kilograms for practical use.
Weight (g) = Volume (cm³) × Density (g/cm³)
Weight (kg) = Weight (g) / 1000
Variables Table
Here's a summary of the variables involved:
| Variable |
Meaning |
Unit |
Typical Range / Notes |
| Brass Alloy Type |
Specific composition of the brass (e.g., UNS C36000) |
N/A |
Free Cutting Brass (360), Naval Brass, Red Brass, Cartridge Brass |
| Density (ρ) |
Mass per unit volume of the brass alloy |
g/cm³ |
~8.4 – 8.7 g/cm³ (varies by alloy) |
| Shape |
Geometric form of the component |
N/A |
Rod, Tube, Sheet, Wire, Custom |
| Dimensions |
Measurements defining the component's size (e.g., Diameter, Length, Thickness) |
mm |
User input based on component |
| Volume (V) |
The amount of space the brass component occupies |
cm³ |
Calculated based on shape and dimensions |
| Weight (W) |
The mass of the brass component |
kg |
Final calculated output |
Practical Examples (Real-World Use Cases)
Understanding the practical application of the 360 brass weight calculator is key. Here are a couple of scenarios:
Example 1: Machining a Brass Rod
A machine shop needs to produce 50 identical brass rods for a custom component. Each rod is specified as:
- Brass Alloy: Free Cutting Brass (UNS C36000)
- Shape: Rod
- Diameter: 20 mm
- Length: 150 mm
Using the Calculator:
- Select "Free Cutting Brass (e.g., 360)" for Material Type.
- Select "Rod" for Shape.
- Enter 20 mm for Dimension 1 (Diameter).
- Enter 150 mm for Dimension 3 (Length). Dimension 2 can be left blank or set to 0 for a simple rod.
- Click "Calculate Weight".
Calculator Output:
- Brass Density: ~8.54 g/cm³ (for C36000)
- Calculated Volume: ~4712.39 cm³
- Estimated Brass Weight (per rod): ~4.02 kg
Financial Interpretation: The shop now knows that each rod weighs approximately 4.02 kg. For 50 rods, they will need 201 kg of brass. This information is vital for ordering the correct amount of raw material, calculating machining time (heavier parts often take longer), and estimating shipping costs for the finished components.
Example 2: Fabricating a Brass Sheet Component
A fabricator is creating decorative panels from brass sheet metal. They need to determine the weight of a panel with the following specifications:
- Brass Alloy: Cartridge Brass (e.g., UNS C26000)
- Shape: Sheet
- Width: 300 mm
- Thickness: 3 mm
- Length: 600 mm
Using the Calculator:
- Select "Cartridge Brass" for Material Type.
- Select "Sheet" for Shape.
- Enter 300 mm for Dimension 1 (Width).
- Enter 3 mm for Dimension 2 (Thickness).
- Enter 600 mm for Dimension 3 (Length).
- Click "Calculate Weight".
Calculator Output:
- Brass Density: ~8.53 g/cm³ (for C26000)
- Calculated Volume: ~54000 mm³ = 54 cm³
- Estimated Brass Weight: ~0.46 kg
Financial Interpretation: This panel is relatively light at about 0.46 kg. This helps in determining handling requirements, mounting hardware specifications, and overall project cost. If they were producing hundreds of these panels, the cumulative weight and material cost would become significant, making accurate calculation essential for effective material management.
How to Use This 360 Brass Weight Calculator
Using the 360 brass weight calculator is designed to be intuitive and straightforward. Follow these steps to get your accurate brass weight estimate:
- Select Brass Alloy: From the 'Brass Alloy Type' dropdown, choose the specific type of brass you are using. Common options like Free Cutting Brass (360) are provided, but others like Naval Brass or Cartridge Brass are also available. Each alloy has a different density, which is crucial for accurate weight calculation.
- Choose Component Shape: Select the geometric shape of your brass component from the 'Component Shape' dropdown (e.g., Rod, Tube, Sheet, Wire). If your component has a complex or irregular shape, you might need to calculate the volume manually and select 'Custom', then input the total volume.
- Enter Dimensions: Based on the selected shape, input the relevant dimensions in millimeters (mm).
- For rods or wires, you'll typically need the Diameter and Length.
- For tubes, you'll need the Outer Diameter, Inner Diameter (or Wall Thickness), and Length.
- For sheets, you'll need Width, Thickness, and Length.
If you selected 'Custom' shape, enter the pre-calculated volume in cubic millimeters (mm³).
- Validate Inputs: The calculator performs inline validation. Ensure all fields are filled with positive numerical values. Error messages will appear below any invalid input fields.
- Calculate Weight: Click the "Calculate Weight" button. The calculator will process your inputs using the appropriate formulas.
How to Read Results
After clicking "Calculate Weight", you will see the results displayed prominently:
- Estimated Brass Weight: This is the primary result, shown in kilograms (kg). It represents the total mass of your brass component.
- Brass Density: Displays the density (g/cm³) of the selected brass alloy.
- Calculated Volume: Shows the computed volume of your component in cubic centimeters (cm³).
- Material Type: Confirms the brass alloy selected.
A brief explanation of the formula used (Weight = Volume × Density) is also provided for clarity.
Decision-Making Guidance
The results from the 360 brass weight calculator can inform several key decisions:
- Material Procurement: Use the weight to order the precise amount of brass needed, avoiding over-ordering or shortages.
- Cost Estimation: Combine the calculated weight with the current market price per kilogram of brass to estimate material costs accurately.
- Shipping and Logistics: The weight is essential for calculating shipping charges and ensuring compliance with transportation regulations.
- Structural Design: For components that are part of a larger structure, knowing the weight helps in calculating load-bearing requirements and overall structural stability.
- Machining Efficiency: Understanding the weight can help in planning machining processes, tool selection, and estimating cycle times.
Use the "Copy Results" button to easily transfer the calculated data for use in reports or other applications. The dynamic chart also provides a visual comparison, aiding in understanding the impact of different brass densities.
Key Factors That Affect 360 Brass Weight Results
While the 360 brass weight calculator provides a reliable estimate, several factors can influence the actual weight of a brass component. Understanding these nuances is important for professionals working with brass materials.
-
Brass Alloy Composition (Density Variation):
The most significant factor is the specific alloy composition. While the calculator uses standard density values (e.g., ~8.5 g/cm³ for C36000), minor variations in the percentages of copper, zinc, lead, and other elements can slightly alter the actual density. For highly critical applications, consulting the material's specific mill certification (MTR) for exact density is recommended.
-
Manufacturing Tolerances:
Real-world manufacturing processes rarely achieve perfect dimensions. Slight deviations in diameter, thickness, length, or wall thickness are common. These tolerances, though often small, can accumulate and lead to a measurable difference in the final component's volume and, consequently, its weight.
-
Machining Processes:
When brass is machined (e.g., turning, milling), material is removed. The calculator typically assumes the initial volume before significant material removal, or it calculates based on the final desired dimensions. If calculating based on a raw stock size, the weight of the removed chips is not included in the final part's weight. The calculator is best used for estimating the weight of the finished part or the raw material needed.
-
Hollow Components and Internal Features:
For hollow components like tubes, the accuracy of the inner diameter or wall thickness measurement is critical. Inaccurate inputs here will directly impact the calculated volume and weight. Complex internal features or voids not accounted for in standard shapes will also alter the weight.
-
Surface Treatments and Coatings:
Some brass components may undergo surface treatments like plating (e.g., nickel plating) or anodizing. These processes add a small amount of mass to the component. While often negligible for rough estimates, they can be relevant for high-precision applications.
-
Temperature Effects:
Materials expand and contract with temperature changes. While brass has a relatively low coefficient of thermal expansion compared to some other metals, significant temperature fluctuations during measurement or use could theoretically alter dimensions slightly. However, for most practical purposes, this effect is minimal and usually ignored in weight calculations.
-
Internal Stress and Microstructure:
Internal stresses within the material or variations in its microstructure (grain size, etc.) can subtly affect density. These are typically very minor effects and are usually encompassed within the standard density ranges used by calculators.
By considering these factors, users can better interpret the results from the 360 brass weight calculator and make more informed decisions regarding material selection, procurement, and application design.
Frequently Asked Questions (FAQ)
Q1: What is the standard density of 360 brass?
A1: The standard density for Free Cutting Brass (UNS C36000) is approximately 8.54 grams per cubic centimeter (g/cm³), which is equivalent to about 8540 kilograms per cubic meter (kg/m³).
Q2: Does the calculator handle different units for dimensions?
A2: This calculator is designed to work with millimeters (mm) for all dimensional inputs to ensure consistency in volume calculation (mm³), which is then converted to cm³ for weight calculation.
Q3: Can I calculate the weight of a hollow brass sphere?
A3: Currently, the calculator supports standard shapes like rods, tubes, sheets, and wires. For complex shapes like hollow spheres, you would need to calculate the volume manually (Volume = 4/3 * π * (OuterRadius³ – InnerRadius³)) and input it using the 'Custom' shape option.
Q4: How accurate is the 360 brass weight calculator?
A4: The calculator is highly accurate for standard conditions, relying on established density values and geometric formulas. However, actual weight may vary slightly due to manufacturing tolerances and minor alloy composition differences, as discussed in the 'Key Factors' section.
Q5: What is the difference between Free Cutting Brass (360) and other brass types?
A5: Free Cutting Brass (C36000) contains a higher percentage of lead (~3%), making it excellent for machining operations, resulting in short chips and good surface finishes. Other brasses, like Naval Brass (C46400) or Cartridge Brass (C26000), have different compositions optimized for properties like corrosion resistance or ductility, and thus possess slightly different densities and mechanical characteristics.
Q6: Can this calculator be used for brass alloys other than 360?
A6: Yes, the calculator allows you to select from several common brass alloys, each with its specific density value programmed in. Ensure you select the correct alloy type for the most accurate result.
Q7: What does "Copy Results" do?
A7: The "Copy Results" button copies the main calculated weight, intermediate values (density, volume), and key assumptions (material type) to your clipboard, allowing you to easily paste them into documents, spreadsheets, or emails.
Q8: How do I convert the weight from kg to lbs?
A8: To convert kilograms (kg) to pounds (lbs), multiply the weight in kg by 2.20462. For example, if the calculator shows 4.02 kg, the weight in pounds would be approximately 4.02 * 2.20462 = 8.86 lbs.
var densityMap = {
"free_cutting_brass": 8.54, // UNS C36000
"naval_brass": 8.56, // UNS C46400
"red_brass": 8.73, // UNS C23000
"cartridge_brass": 8.53 // UNS C26000
};
var chartInstance = null; // To hold the chart instance
function getDensity(materialType) {
return densityMap[materialType] || 8.54; // Default to C36000 if not found
}
function calculateVolume(shape, dims) {
var d1 = parseFloat(dims.d1);
var d2 = parseFloat(dims.d2);
var d3 = parseFloat(dims.d3);
var volume_mm3 = 0;
if (shape === "rod" || shape === "wire") {
if (isNaN(d1) || isNaN(d3) || d1 <= 0 || d3 <= 0) return 0;
var radius = d1 / 2;
volume_mm3 = Math.PI * Math.pow(radius, 2) * d3;
} else if (shape === "tube") {
if (isNaN(d1) || isNaN(d2) || isNaN(d3) || d1 <= 0 || d2 <= 0 || d3 = outerRadius) return 0; // Inner radius cannot be larger than outer
volume_mm3 = Math.PI * (Math.pow(outerRadius, 2) – Math.pow(innerRadius, 2)) * d3;
} else if (shape === "sheet") {
if (isNaN(d1) || isNaN(d2) || isNaN(d3) || d1 <= 0 || d2 <= 0 || d3 <= 0) return 0;
volume_mm3 = d1 * d2 * d3;
} else if (shape === "custom") {
if (isNaN(d1) || d1 <= 0) return 0; // d1 is used for custom volume input
volume_mm3 = d1;
}
return volume_mm3 / 1000; // Convert mm³ to cm³
}
function validateInput(id, errorId, minValue = null, maxValue = null) {
var input = document.getElementById(id);
var errorSpan = document.getElementById(errorId);
var value = input.value.trim();
var isValid = true;
errorSpan.textContent = ''; // Clear previous error
if (value === "") {
errorSpan.textContent = "This field is required.";
isValid = false;
} else {
var numValue = parseFloat(value);
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isValid = false;
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}
return isValid ? numValue : null;
}
function updateChart() {
var ctx = document.getElementById('weightDensityChart').getContext('2d');
var selectedMaterial = document.getElementById('materialType').value;
var selectedShape = document.getElementById('shape').value;
var dims = {};
// Get dimensions based on shape
if (selectedShape === "rod" || selectedShape === "wire") {
dims.d1 = document.getElementById('dimension1').value; // Diameter
dims.d3 = document.getElementById('dimension3').value; // Length
} else if (selectedShape === "tube") {
dims.d1 = document.getElementById('dimension1').value; // Outer Diameter
dims.d2 = document.getElementById('dimension2').value; // Inner Diameter
dims.d3 = document.getElementById('dimension3').value; // Length
} else if (selectedShape === "sheet") {
dims.d1 = document.getElementById('dimension1').value; // Width
dims.d2 = document.getElementById('dimension2').value; // Thickness
dims.d3 = document.getElementById('dimension3').value; // Length
} else if (selectedShape === "custom") {
dims.d1 = document.getElementById('customVolume').value; // Custom Volume
}
var baseVolumeCm3 = calculateVolume(selectedShape, dims);
if (baseVolumeCm3 === 0) {
// If dimensions are invalid, use a default volume for chart comparison
baseVolumeCm3 = 1000; // Default to 1000 cm³ for comparison
}
var data = {
labels: ['Density (g/cm³)', 'Weight (kg) for 1000 cm³'],
datasets: [
{
label: 'Free Cutting Brass (360)',
data: [densityMap["free_cutting_brass"], baseVolumeCm3 * densityMap["free_cutting_brass"]],
backgroundColor: 'rgba(0, 74, 153, 0.7)',
borderColor: 'rgba(0, 74, 153, 1)',
borderWidth: 1,
yAxisID: 'y-axis-density', // Assign to density axis
type: 'bar' // Specify bar type for this dataset
},
{
label: 'Naval Brass',
data: [densityMap["naval_brass"], baseVolumeCm3 * densityMap["naval_brass"]],
backgroundColor: 'rgba(40, 167, 69, 0.7)',
borderColor: 'rgba(40, 167, 69, 1)',
borderWidth: 1,
yAxisID: 'y-axis-density',
type: 'bar'
},
{
label: 'Red Brass',
data: [densityMap["red_brass"], baseVolumeCm3 * densityMap["red_brass"]],
backgroundColor: 'rgba(255, 193, 7, 0.7)',
borderColor: 'rgba(255, 193, 7, 1)',
borderWidth: 1,
yAxisID: 'y-axis-density',
type: 'bar'
},
{
label: 'Cartridge Brass',
data: [densityMap["cartridge_brass"], baseVolumeCm3 * densityMap["cartridge_brass"]],
backgroundColor: 'rgba(108, 117, 125, 0.7)',
borderColor: 'rgba(108, 117, 125, 1)',
borderWidth: 1,
yAxisID: 'y-axis-density',
type: 'bar'
}
]
};
var options = {
responsive: true,
maintainAspectRatio: false,
scales: {
x: {
title: {
display: true,
text: 'Metric'
}
},
'y-axis-density': { // Define the density axis
type: 'linear',
position: 'left',
title: {
display: true,
text: 'Density (g/cm³)'
},
grid: {
drawOnChartArea: true,
},
ticks: {
beginAtZero: false // Density doesn't always start at zero
}
},
'y-axis-weight': { // Define the weight axis
type: 'linear',
position: 'right',
title: {
display: true,
text: 'Weight (kg)'
},
grid: {
drawOnChartArea: false, // Only draw grid lines for the primary axis
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ticks: {
beginAtZero: true
}
}
},
plugins: {
tooltip: {
callbacks: {
label: function(context) {
var label = context.dataset.label || ";
if (label) {
label += ': ';
}
if (context.parsed.x === 0) { // Density
label += context.parsed.y.toFixed(2) + ' g/cm³';
} else { // Weight
label += context.parsed.y.toFixed(2) + ' kg';
}
return label;
}
}
},
legend: {
display: false // Hide default legend, use custom one
}
}
};
// Destroy previous chart instance if it exists
if (chartInstance) {
chartInstance.destroy();
}
// Create new chart instance
chartInstance = new Chart(ctx, {
type: 'bar', // Default type, can be overridden by dataset type
data: data,
options: options
});
}
function calculateWeight() {
var isValid = true;
var materialType = document.getElementById('materialType').value;
var shape = document.getElementById('shape').value;
var density = getDensity(materialType);
var volume_cm3 = 0;
var weight_kg = 0;
// Clear previous errors
document.getElementById('materialTypeError').textContent = ";
document.getElementById('shapeError').textContent = ";
document.getElementById('dimension1Error').textContent = ";
document.getElementById('dimension2Error').textContent = ";
document.getElementById('dimension3Error').textContent = ";
document.getElementById('customVolumeError').textContent = ";
// Validate Material Type and Shape (basic check)
if (!materialType) {
document.getElementById('materialTypeError').textContent = "Please select a material type.";
isValid = false;
}
if (!shape) {
document.getElementById('shapeError').textContent = "Please select a shape.";
isValid = false;
}
var dims = {};
if (shape === "rod" || shape === "wire") {
dims.d1 = validateInput('dimension1', 'dimension1Error', 0.01); // Min dimension 0.01mm
dims.d3 = validateInput('dimension3', 'dimension3Error', 0.01); // Min dimension 0.01mm
if (dims.d1 === null || dims.d3 === null) isValid = false;
document.getElementById('dimension2').value = ""; // Clear unused dimension
} else if (shape === "tube") {
dims.d1 = validateInput('dimension1', 'dimension1Error', 0.01); // Outer Diameter
dims.d2 = validateInput('dimension2', 'dimension2Error', 0.01); // Inner Diameter
dims.d3 = validateInput('dimension3', 'dimension3Error', 0.01); // Length
if (dims.d1 === null || dims.d2 === null || dims.d3 === null) isValid = false;
// Additional check for tube dimensions
if (dims.d1 !== null && dims.d2 !== null && dims.d1 <= dims.d2) {
document.getElementById('dimension2Error').textContent = "Inner diameter must be smaller than outer diameter.";
isValid = false;
}
} else if (shape === "sheet") {
dims.d1 = validateInput('dimension1', 'dimension1Error', 0.01); // Width
dims.d2 = validateInput('dimension2', 'dimension2Error', 0.01); // Thickness
dims.d3 = validateInput('dimension3', 'dimension3Error', 0.01); // Length
if (dims.d1 === null || dims.d2 === null || dims.d3 === null) isValid = false;
} else if (shape === "custom") {
dims.d1 = validateInput('customVolume', 'customVolumeError', 0.01); // Custom Volume
if (dims.d1 === null) isValid = false;
document.getElementById('dimension1').value = ""; // Clear unused dimensions
document.getElementById('dimension2').value = "";
document.getElementById('dimension3').value = "";
}
if (isValid) {
volume_cm3 = calculateVolume(shape, dims);
weight_kg = volume_cm3 * density;
document.getElementById('mainResult').textContent = weight_kg.toFixed(2);
document.getElementById('densityResult').textContent = density.toFixed(2);
document.getElementById('volumeResult').textContent = volume_cm3.toFixed(2);
document.getElementById('materialTypeResult').textContent = document.getElementById('materialType').options[document.getElementById('materialType').selectedIndex].text;
updateChart(); // Update chart after calculation
} else {
document.getElementById('mainResult').textContent = "–";
document.getElementById('densityResult').textContent = "–";
document.getElementById('volumeResult').textContent = "–";
document.getElementById('materialTypeResult').textContent = "–";
if (chartInstance) chartInstance.destroy(); // Clear chart if calculation failed
}
return isValid;
}
function resetCalculator() {
document.getElementById('materialType').value = "free_cutting_brass";
document.getElementById('shape').value = "rod";
document.getElementById('dimension1').value = "25";
document.getElementById('dimension2').value = "10"; // Default for tube example
document.getElementById('dimension3').value = "1000";
document.getElementById('customVolume').value = "";
document.getElementById('dimensionInputs').style.display = "block";
document.getElementById('customVolumeInput').style.display = "none";
// Clear errors
document.getElementById('materialTypeError').textContent = '';
document.getElementById('shapeError').textContent = '';
document.getElementById('dimension1Error').textContent = '';
document.getElementById('dimension2Error').textContent = '';
document.getElementById('dimension3Error').textContent = '';
document.getElementById('customVolumeError').textContent = '';
calculateWeight(); // Recalculate with default values
}
function copyResults() {
var mainResult = document.getElementById('mainResult').textContent;
var density = document.getElementById('densityResult').textContent;
var volume = document.getElementById('volumeResult').textContent;
var material = document.getElementById('materialTypeResult').textContent;
var materialTypeSelect = document.getElementById('materialType');
var selectedMaterialText = materialTypeSelect.options[materialTypeSelect.selectedIndex].text;
var shapeSelect = document.getElementById('shape');
var selectedShapeText = shapeSelect.options[shapeSelect.selectedIndex].text;
if (mainResult === "–") {
alert("No results to copy yet. Please perform a calculation first.");
return;
}
var resultsText = "— Brass Weight Calculation Results —\n\n";
resultsText += "Material Type: " + selectedMaterialText + "\n";
resultsText += "Component Shape: " + selectedShapeText + "\n";
resultsText += "————————————\n";
resultsText += "Estimated Brass Weight: " + mainResult + " kg\n";
resultsText += "Brass Density: " + density + " g/cm³\n";
resultsText += "Calculated Volume: " + volume + " cm³\n";
resultsText += "————————————\n";
resultsText += "Formula Used: 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.");
}
}
// Handle shape change to show/hide relevant inputs
document.getElementById('shape').addEventListener('change', function() {
var shape = this.value;
var dimensionInputs = document.getElementById('dimensionInputs');
var customVolumeInput = document.getElementById('customVolumeInput');
// Clear previous dimension values and errors
document.getElementById('dimension1').value = "";
document.getElementById('dimension2').value = "";
document.getElementById('dimension3').value = "";
document.getElementById('customVolume').value = "";
document.getElementById('dimension1Error').textContent = '';
document.getElementById('dimension2Error').textContent = '';
document.getElementById('dimension3Error').textContent = '';
document.getElementById('customVolumeError').textContent = '';
if (shape === "custom") {
dimensionInputs.style.display = "none";
customVolumeInput.style.display = "block";
// Update labels for custom volume
document.querySelector('#customVolumeInput label').textContent = "Custom Volume";
document.querySelector('#customVolumeInput .helper-text').textContent = "Enter the total volume in cubic millimeters (mm³).";
} else {
dimensionInputs.style.display = "block";
customVolumeInput.style.display = "none";
// Update labels based on shape
var label1 = document.querySelector('#dimensionInputs .input-group:nth-child(1) label');
var label2 = document.querySelector('#dimensionInputs .input-group:nth-child(2) label');
var label3 = document.querySelector('#dimensionInputs .input-group:nth-child(3) label');
var helper1 = document.querySelector('#dimensionInputs .input-group:nth-child(1) .helper-text');
var helper2 = document.querySelector('#dimensionInputs .input-group:nth-child(2) .helper-text');
var helper3 = document.querySelector('#dimensionInputs .input-group:nth-child(3) .helper-text');
if (shape === "rod" || shape === "wire") {
label1.textContent = "Diameter";
helper1.textContent = "Enter the diameter in millimeters (mm).";
label2.textContent = "N/A"; // Hide or indicate not used
label2.style.display = "none";
document.querySelector('#dimensionInputs .input-group:nth-child(2)').style.display = "none";
label3.textContent = "Length";
helper3.textContent = "Enter the length in millimeters (mm).";
} else if (shape === "tube") {
label1.textContent = "Outer Diameter";
helper1.textContent = "Enter the outer diameter in millimeters (mm).";
label2.textContent = "Inner Diameter";
helper2.textContent = "Enter the inner diameter in millimeters (mm).";
label2.style.display = "block";
document.querySelector('#dimensionInputs .input-group:nth-child(2)').style.display = "block";
label3.textContent = "Length";
helper3.textContent = "Enter the length in millimeters (mm).";
} else if (shape === "sheet") {
label1.textContent = "Width";
helper1.textContent = "Enter the width in millimeters (mm).";
label2.textContent = "Thickness";
helper2.textContent = "Enter the thickness in millimeters (mm).";
label2.style.display = "block";
document.querySelector('#dimensionInputs .input-group:nth-child(2)').style.display = "block";
label3.textContent = "Length";
helper3.textContent = "Enter the length in millimeters (mm).";
}
}
// Trigger recalculation after changing shape and potentially inputs
calculateWeight();
});
// Initial calculation on page load
window.onload = function() {
// Ensure Chart.js is loaded before trying to use it
if (typeof Chart !== 'undefined') {
updateChart(); // Initialize chart
} else {
console.error("Chart.js not loaded. Please ensure it's included.");
// Optionally, display a message to the user
}
calculateWeight(); // Perform initial calculation
};
// Add Chart.js library dynamically if not present
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'; // Use a specific version
script.onload = function() {
console.log("Chart.js loaded successfully.");
// Re-initialize chart and calculation after library load
updateChart();
calculateWeight();
};
script.onerror = function() {
console.error("Failed to load Chart.js library.");
// Display an error message to the user if the chart is critical
};
document.head.appendChild(script);
}