Iron Metal Weight Calculator & Guide – Calculate Your Iron's Weight Accurately
:root {
–primary-color: #004a99;
–success-color: #28a745;
–background-color: #f8f9fa;
–text-color: #333;
–label-color: #555;
–border-color: #ccc;
–shadow-color: rgba(0, 0, 0, 0.1);
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: var(–background-color);
color: var(–text-color);
margin: 0;
padding: 0;
line-height: 1.6;
}
.container {
max-width: 960px;
margin: 20px auto;
padding: 20px;
background-color: #fff;
border-radius: 8px;
box-shadow: 0 4px 12px var(–shadow-color);
}
header {
background-color: var(–primary-color);
color: #fff;
padding: 20px 0;
text-align: center;
margin-bottom: 20px;
border-radius: 8px 8px 0 0;
}
header h1 {
margin: 0;
font-size: 2.2em;
}
h2, h3 {
color: var(–primary-color);
margin-top: 25px;
margin-bottom: 10px;
border-bottom: 2px solid var(–primary-color);
padding-bottom: 5px;
}
.calculator-section {
margin-bottom: 30px;
padding: 20px;
background-color: var(–background-color);
border-radius: 8px;
box-shadow: inset 0 2px 4px var(–shadow-color);
}
.calculator-section h2 {
border-bottom: none;
margin-top: 0;
}
.input-group {
margin-bottom: 20px;
text-align: left;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: bold;
color: var(–label-color);
}
.input-group input[type="number"],
.input-group select {
width: calc(100% – 22px);
padding: 10px;
border: 1px solid var(–border-color);
border-radius: 4px;
font-size: 1em;
box-sizing: border-box;
}
.input-group select {
cursor: pointer;
}
.input-group .helper-text {
font-size: 0.85em;
color: #777;
margin-top: 5px;
}
.error-message {
color: #dc3545;
font-size: 0.85em;
margin-top: 5px;
min-height: 1.1em; /* Prevent layout shift */
}
.button-group {
display: flex;
justify-content: space-between;
margin-top: 25px;
}
button {
padding: 12px 20px;
font-size: 1em;
border: none;
border-radius: 5px;
cursor: pointer;
transition: background-color 0.3s ease, transform 0.2s ease;
font-weight: bold;
}
.calculate-btn {
background-color: var(–primary-color);
color: white;
}
.calculate-btn:hover {
background-color: #003366;
transform: translateY(-2px);
}
.reset-btn {
background-color: #6c757d;
color: white;
}
.reset-btn:hover {
background-color: #5a6268;
transform: translateY(-2px);
}
.copy-btn {
background-color: var(–success-color);
color: white;
}
.copy-btn:hover {
background-color: #218838;
transform: translateY(-2px);
}
.results-container {
margin-top: 30px;
padding: 20px;
background-color: var(–primary-color);
color: white;
border-radius: 6px;
text-align: center;
box-shadow: 0 2px 8px var(–shadow-color);
}
.results-container h3 {
color: white;
margin-top: 0;
margin-bottom: 15px;
border-bottom: 1px solid rgba(255, 255, 255, 0.5);
padding-bottom: 10px;
}
.primary-result {
font-size: 2.5em;
font-weight: bold;
margin-bottom: 15px;
color: var(–success-color);
}
.intermediate-results div, .formula-explanation {
margin-bottom: 10px;
font-size: 1.1em;
}
.formula-explanation {
font-style: italic;
color: rgba(255, 255, 255, 0.8);
}
table {
width: 100%;
border-collapse: collapse;
margin-top: 20px;
margin-bottom: 30px;
font-size: 0.95em;
}
th, td {
padding: 12px 15px;
text-align: left;
border: 1px solid var(–border-color);
}
thead {
background-color: var(–primary-color);
color: white;
}
tbody tr:nth-child(even) {
background-color: #f2f2f2;
}
caption {
font-size: 1.1em;
font-weight: bold;
color: var(–label-color);
margin-bottom: 10px;
text-align: left;
}
.chart-container {
text-align: center;
margin-top: 30px;
background-color: #fff;
padding: 20px;
border-radius: 8px;
box-shadow: 0 2px 8px var(–shadow-color);
}
.chart-container h3 {
margin-top: 0;
}
canvas {
max-width: 100%;
height: auto !important; /* Override potential fixed heights */
}
.article-section {
margin-top: 40px;
padding-top: 30px;
border-top: 1px solid var(–border-color);
}
.article-section:first-of-type {
margin-top: 0;
padding-top: 0;
border-top: none;
}
.article-section h2 {
text-align: center;
margin-bottom: 20px;
}
.article-section h3 {
margin-top: 25px;
margin-bottom: 15px;
border-bottom: 1px solid var(–primary-color);
}
.article-section p {
margin-bottom: 15px;
}
.article-section ul, .article-section ol {
margin-left: 20px;
margin-bottom: 15px;
}
.article-section li {
margin-bottom: 8px;
}
.faq-item {
margin-bottom: 15px;
border: 1px solid #e0e0e0;
border-radius: 4px;
padding: 10px 15px;
background-color: #fdfdfd;
}
.faq-item strong {
color: var(–primary-color);
display: block;
margin-bottom: 5px;
}
.internal-links ul {
list-style: none;
padding: 0;
}
.internal-links li {
margin-bottom: 12px;
padding-bottom: 12px;
border-bottom: 1px dashed var(–border-color);
}
.internal-links li:last-child {
border-bottom: none;
padding-bottom: 0;
}
.internal-links a {
color: var(–primary-color);
font-weight: bold;
text-decoration: none;
}
.internal-links a:hover {
text-decoration: underline;
}
.internal-links p {
font-size: 0.9em;
color: #555;
margin-top: 5px;
}
@media (max-width: 600px) {
.container {
margin: 10px;
padding: 15px;
}
header h1 {
font-size: 1.8em;
}
button {
padding: 10px 15px;
font-size: 0.95em;
width: 100%;
margin-bottom: 10px;
}
.button-group {
flex-direction: column;
align-items: center;
}
.button-group button {
width: 80%;
}
.results-container, .chart-container {
padding: 15px;
}
.primary-result {
font-size: 2em;
}
th, td {
padding: 8px 10px;
}
}
Calculation Results
0.00 kg
Weight = Volume × Density
Weight vs. Volume for Different Densities
Chart shows how weight changes with volume for common iron densities.
Common Iron Densities
| Iron Type |
Approximate Density (g/cm³) |
Common Uses |
| Pure Iron |
7.874 |
Industrial processes, scientific research |
| Wrought Iron |
7.85 |
Decorative elements, historical applications |
| Cast Iron |
7.87 |
Engine blocks, pipes, cookware, machinery parts |
| Steel (Iron Alloy) |
7.85 |
Construction, automotive, tools |
Understanding and Calculating Iron Metal Weight
Welcome to the Iron Metal Weight Calculator! This tool helps you precisely determine the weight of various iron components based on their shape, dimensions, and material density. Understanding iron metal weight is crucial for project planning, material procurement, shipping logistics, and structural integrity assessments in numerous industries. Whether you're working with bars, rods, plates, or custom shapes, this calculator simplifies the complex calculations involved.
What is Iron Metal Weight Calculation?
The calculation of iron metal weight involves determining the physical mass of an iron object. This is achieved by multiplying its volume by the density of the specific type of iron used. Iron, being a fundamental metal in engineering and construction, comes in various forms (like cast iron, wrought iron, and steel alloys), each with slightly different densities. An accurate iron metal weight calculator is essential for anyone dealing with iron components, from small-scale craftspeople to large industrial operations. It helps in estimating material costs, planning transportation, ensuring structural stability, and managing inventory.
Who should use it?
- Engineers and Designers: For material selection and structural analysis.
- Fabricators and Manufacturers: For accurate material ordering and cost estimation.
- Procurement Specialists: To budget for raw materials.
- Logistics and Shipping Managers: To determine shipping costs and capacity.
- Students and Educators: For learning about material science and physics.
- DIY Enthusiasts: For smaller projects involving metal.
Common Misconceptions:
- All iron weighs the same: Different types of iron and steel alloys have varying densities, leading to different weights for the same volume.
- Weight is solely determined by dimensions: While dimensions determine volume, the density of the material is equally critical.
- Calculations are too complex for simple tools: Modern calculators like this one automate the process, making it accessible to everyone.
Iron Metal Weight Calculator Formula and Mathematical Explanation
The core principle behind calculating the iron metal weight calculator is the fundamental physics formula relating mass, density, and volume:
Weight (Mass) = Volume × Density
Here's a breakdown of the components:
1. Volume Calculation: The first step is to determine the volume of the iron object. The formula for volume depends on the shape of the iron piece:
- Cuboid (Bar, Plate, Block): Volume = Length × Width × Height
- Cylinder (Rod, Pipe): Volume = π × (Diameter/2)² × Length. (Where π ≈ 3.14159)
- Sphere: Volume = (4/3) × π × (Diameter/2)³
2. Density of Iron: Density is a measure of mass per unit volume. Different types of iron have slightly different densities. Common values are provided in the calculator, but precise measurements might require specific material data sheets. For this iron metal weight calculator, we use common approximations.
3. Weight Calculation: Once you have the volume (in cubic centimeters, cm³) and the density (in grams per cubic centimeter, g/cm³), you multiply them to get the weight in grams.
Weight (grams) = Volume (cm³) × Density (g/cm³)
Finally, the result is often converted to kilograms (kg) for practical use by dividing by 1000.
Weight (kg) = Weight (grams) / 1000
Variables Table:
| Variable |
Meaning |
Unit |
Typical Range |
| Length (L) |
The longest dimension of a cuboid or cylinder. |
cm |
1 – 1000+ |
| Width (W) |
The second dimension of a cuboid. |
cm |
1 – 1000+ |
| Height (H) / Thickness (T) |
The third dimension of a cuboid. |
cm |
0.1 – 100+ |
| Diameter (D) |
The distance across a cylinder or sphere through its center. |
cm |
1 – 1000+ |
| Radius (R) |
Half of the diameter (used in some volume formulas). |
cm |
0.5 – 500+ |
| Volume (V) |
The amount of space occupied by the iron. |
cm³ |
Calculated |
| Density (ρ) |
Mass per unit volume of the iron type. |
g/cm³ |
~7.85 – 7.874 |
| Weight (M) |
The mass of the iron object. |
g or kg |
Calculated |
Practical Examples (Real-World Use Cases)
Let's illustrate the use of the iron metal weight calculator with practical scenarios:
Example 1: Calculating the Weight of an Iron Plate
A structural engineer needs to determine the weight of a rectangular iron plate for a construction project.
- Shape: Cuboid
- Inputs:
- Length: 200 cm
- Width: 100 cm
- Height/Thickness: 2 cm
- Iron Type: Cast Iron (Density: 7.87 g/cm³)
- Calculation Steps:
- Volume = 200 cm × 100 cm × 2 cm = 40,000 cm³
- Weight (grams) = 40,000 cm³ × 7.87 g/cm³ = 314,800 g
- Weight (kg) = 314,800 g / 1000 = 314.8 kg
- Result Interpretation: The iron plate weighs approximately 314.8 kg. This information is vital for crane load calculations, transportation planning, and ensuring the structural support can handle the weight. Use our material cost calculator to estimate the cost.
Example 2: Determining the Weight of an Iron Rod
A workshop manager needs to know the weight of a cylindrical iron rod for inventory and shipping purposes.
- Shape: Cylinder
- Inputs:
- Diameter: 10 cm
- Length: 150 cm
- Iron Type: Pure Iron (Density: 7.874 g/cm³)
- Calculation Steps:
- Radius = Diameter / 2 = 10 cm / 2 = 5 cm
- Volume = π × (5 cm)² × 150 cm ≈ 3.14159 × 25 cm² × 150 cm ≈ 11,780.96 cm³
- Weight (grams) = 11,780.96 cm³ × 7.874 g/cm³ ≈ 92,857.6 g
- Weight (kg) = 92,857.6 g / 1000 ≈ 92.86 kg
- Result Interpretation: The iron rod weighs approximately 92.86 kg. This helps in accurately estimating shipping fees, ensuring proper handling equipment is used, and managing stock levels. For larger quantities, our bulk material calculator can be beneficial.
How to Use This Iron Metal Weight Calculator
Using this iron metal weight calculator is straightforward. Follow these simple steps:
- Select the Shape: Choose the correct geometric shape of your iron component (Cuboid, Cylinder, or Sphere) from the dropdown menu.
- Input Dimensions: Enter the relevant dimensions (Length, Width, Height, Diameter) in centimeters (cm) based on the selected shape. Ensure your measurements are accurate.
- Choose Iron Density: Select the type of iron from the dropdown (e.g., Cast Iron, Pure Iron). If you have a specific custom density value, select 'Custom' and enter it in g/cm³.
- Calculate: Click the "Calculate Weight" button.
How to Read Results:
- Primary Result (Weight): The largest number displayed in green indicates the total weight of your iron component in kilograms (kg).
- Intermediate Values: You'll also see the calculated Volume (in cm³), the Density used (in g/cm³), and the Weight in grams (g).
- Formula Explanation: A brief reminder of the calculation: Weight = Volume × Density.
Decision-Making Guidance:
- Procurement: Use the calculated weight to order the correct amount of raw material.
- Logistics: The weight helps determine shipping costs, vehicle capacity, and handling requirements.
- Project Planning: Integrate the weight into structural load calculations or assembly plans.
- Cost Estimation: Combine the weight with the price per kilogram of iron to estimate material costs. Consider using our material cost estimator.
The "Reset" button clears all fields to their default values, and the "Copy Results" button allows you to easily paste the calculated data elsewhere.
Key Factors That Affect Iron Metal Weight Results
While the core calculation is simple, several factors can influence the accuracy and practical application of the iron metal weight calculator results:
- Material Purity and Alloy Composition: Even within categories like "Cast Iron," variations in carbon content and other alloying elements can slightly alter density. Steel, an iron alloy, has a density very close to pure iron but can vary depending on its specific composition (e.g., stainless steel). Always refer to the material's specification sheet for the most accurate density if precision is critical.
- Manufacturing Tolerances: Real-world metal components rarely have perfect dimensions. Slight variations in length, width, or diameter due to manufacturing processes can lead to minor discrepancies in calculated volume and weight. Understanding material tolerances is key for precision engineering.
- Temperature Fluctuations: Metals expand when heated and contract when cooled. While the effect on density might be minimal for typical ambient temperature changes, extreme temperature variations in industrial processes could slightly alter the metal's volume and thus its weight.
- Internal Structure (Porosity/Voids): Cast iron, for example, can sometimes have internal voids or porosity from the casting process. This reduces the overall density of the part compared to a solid, theoretical block of the same material. This calculator assumes a solid, uniform component.
- Measurement Accuracy: The precision of your input dimensions directly impacts the calculated weight. Inaccurate measurements will lead to inaccurate weight estimations. Double-check all measurements before inputting them.
- Units of Measurement Consistency: Ensure all dimensions are entered in the same unit (centimeters in this calculator) and that the density is in compatible units (g/cm³). Using mixed units will result in incorrect calculations. This is a common pitfall in any iron metal weight calculator.
Frequently Asked Questions (FAQ)
Q1: What is the standard density of iron used in calculators?
A: Common calculators use approximate values. For pure iron, it's around 7.874 g/cm³. Cast iron is very close, typically around 7.87 g/cm³. Steel alloys are also similar, often around 7.85 g/cm³. This calculator provides these common values and allows for custom input.
Q2: Can this calculator be used for steel?
A: Yes, steel is an iron alloy, and its density is very similar to pure iron (around 7.85 g/cm³). You can use the 'Pure Iron' setting or input a custom density if you know the specific steel alloy's properties.
Q3: What units should I use for dimensions?
A: This calculator is designed for dimensions in centimeters (cm). Ensure all your length, width, height, and diameter measurements are in centimeters for accurate results.
Q4: What if my iron part is hollow or has a complex shape?
A: This calculator is best for solid, geometrically simple shapes (cuboids, cylinders, spheres). For hollow parts or complex geometries, you would need to calculate the volume of the material used, subtract any hollow spaces, or use more advanced CAD software for precise volume determination.
Q5: How do I convert the weight from kilograms to pounds?
A: To convert kilograms (kg) to pounds (lbs), multiply the weight in kg by 2.20462. For example, 10 kg is approximately 22.05 lbs.
Q6: Does the calculator account for coatings or paint?
A: No, this iron metal weight calculator calculates the weight of the base iron material only. Coatings like paint, galvanization, or plating add a small amount of weight, but it's usually negligible unless the coating is very thick.
Q7: What is the difference between weight and mass?
A: Technically, mass is the amount of matter in an object, while weight is the force of gravity on that mass. In everyday use and most calculators like this one, "weight" is used interchangeably with "mass," typically measured in kilograms (kg) or grams (g) on Earth.
Q8: Why is calculating iron weight important?
A: It's crucial for cost estimation, material procurement, shipping logistics, structural engineering calculations, and inventory management. Accurate weight data ensures projects stay within budget, are safe, and are efficiently executed.
Related Tools and Internal Resources
var selectedShape = 'cuboid';
var currentDensity = 7.87; // Default to Cast Iron
function showError(elementId, message) {
var errorElement = document.getElementById(elementId);
if (errorElement) {
errorElement.textContent = message;
}
}
function clearErrors() {
showError('lengthError', ");
showError('widthError', ");
showError('heightError', ");
showError('cylinderDiameterError', ");
showError('cylinderLengthError', ");
showError('sphereDiameterError', ");
showError('customDensityError', ");
}
function validateInputs() {
clearErrors();
var isValid = true;
var shape = document.getElementById('shape').value;
var densityValue = parseFloat(document.getElementById('ironDensity').value);
if (shape === 'cuboid') {
var length = parseFloat(document.getElementById('length').value);
var width = parseFloat(document.getElementById('width').value);
var height = parseFloat(document.getElementById('height').value);
if (isNaN(length) || length <= 0) { showError('lengthError', 'Please enter a valid positive length.'); isValid = false; }
if (isNaN(width) || width <= 0) { showError('widthError', 'Please enter a valid positive width.'); isValid = false; }
if (isNaN(height) || height <= 0) { showError('heightError', 'Please enter a valid positive height/thickness.'); isValid = false; }
} else if (shape === 'cylinder') {
var diameter = parseFloat(document.getElementById('cylinderDiameter').value);
var length = parseFloat(document.getElementById('cylinderLength').value);
if (isNaN(diameter) || diameter <= 0) { showError('cylinderDiameterError', 'Please enter a valid positive diameter.'); isValid = false; }
if (isNaN(length) || length <= 0) { showError('cylinderLengthError', 'Please enter a valid positive length.'); isValid = false; }
} else if (shape === 'sphere') {
var diameter = parseFloat(document.getElementById('sphereDiameter').value);
if (isNaN(diameter) || diameter <= 0) { showError('sphereDiameterError', 'Please enter a valid positive diameter.'); isValid = false; }
}
if (document.getElementById('ironDensity').value === 'custom') {
var customDensity = parseFloat(document.getElementById('customDensity').value);
if (isNaN(customDensity) || customDensity <= 0) { showError('customDensityError', 'Please enter a valid positive custom density.'); isValid = false; }
else {
densityValue = customDensity;
}
} else {
densityValue = parseFloat(document.getElementById('ironDensity').value);
}
return { isValid: isValid, density: densityValue };
}
function calculateWeight() {
var validation = validateInputs();
if (!validation.isValid) {
document.getElementById('resultsContainer').style.display = 'none';
return;
}
var shape = document.getElementById('shape').value;
var volumeCm3 = 0;
var densityGramsCm3 = validation.density;
if (shape === 'cuboid') {
var length = parseFloat(document.getElementById('length').value);
var width = parseFloat(document.getElementById('width').value);
var height = parseFloat(document.getElementById('height').value);
volumeCm3 = length * width * height;
} else if (shape === 'cylinder') {
var diameter = parseFloat(document.getElementById('cylinderDiameter').value);
var length = parseFloat(document.getElementById('cylinderLength').value);
var radius = diameter / 2;
volumeCm3 = Math.PI * Math.pow(radius, 2) * length;
} else if (shape === 'sphere') {
var diameter = parseFloat(document.getElementById('sphereDiameter').value);
var radius = diameter / 2;
volumeCm3 = (4/3) * Math.PI * Math.pow(radius, 3);
}
var weightGrams = volumeCm3 * densityGramsCm3;
var weightKg = weightGrams / 1000;
// Update results display
document.getElementById('calculatedWeight').textContent = weightKg.toFixed(2) + ' kg';
document.getElementById('volumeResult').textContent = 'Volume: ' + volumeCm3.toFixed(2) + ' cm³';
document.getElementById('densityResult').textContent = 'Density: ' + densityGramsCm3.toFixed(3) + ' g/cm³';
document.getElementById('weightInGrams').textContent = 'Weight: ' + weightGrams.toFixed(2) + ' g';
document.getElementById('resultsContainer').style.display = 'block';
updateChart(volumeCm3, densityGramsCm3, weightKg);
}
function resetCalculator() {
document.getElementById('shape').value = 'cuboid';
document.getElementById('length').value = '';
document.getElementById('width').value = '';
document.getElementById('height').value = '';
document.getElementById('cylinderDiameter').value = '';
document.getElementById('cylinderLength').value = '';
document.getElementById('sphereDiameter').value = '';
document.getElementById('ironDensity').value = '7.87'; // Cast Iron
document.getElementById('customDensity').value = '';
document.getElementById('cuboidInputs').style.display = 'block';
document.getElementById('cylinderInputs').style.display = 'none';
document.getElementById('sphereInputs').style.display = 'none';
document.getElementById('customDensityInput').style.display = 'none';
clearErrors();
document.getElementById('resultsContainer').style.display = 'none';
updateChart(0, 7.87, 0); // Reset chart
}
function copyResults() {
var weight = document.getElementById('calculatedWeight').textContent;
var volume = document.getElementById('volumeResult').textContent;
var density = document.getElementById('densityResult').textContent;
var weightGrams = document.getElementById('weightInGrams').textContent;
var formula = document.querySelector('.formula-explanation').textContent;
var resultsText = "Iron Weight Calculation Results:\n";
resultsText += "—————————–\n";
resultsText += weight + "\n";
resultsText += volume + "\n";
resultsText += density + "\n";
resultsText += weightGrams + "\n";
resultsText += formula + "\n";
resultsText += "\nAssumptions:\n";
resultsText += "Shape: " + document.getElementById('shape').options[document.getElementById('shape').selectedIndex].text + "\n";
resultsText += "Density Used: " + parseFloat(document.getElementById('ironDensity').value == 'custom' ? document.getElementById('customDensity').value : document.getElementById('ironDensity').value).toFixed(3) + " g/cm³\n";
if (document.getElementById('ironDensity').value === 'custom') {
resultsText += "Custom Density Input: " + document.getElementById('customDensity').value + " g/cm³\n";
}
// Use navigator.clipboard for modern browsers, fallback for older ones
if (navigator.clipboard && navigator.clipboard.writeText) {
navigator.clipboard.writeText(resultsText).then(function() {
alert('Results copied to clipboard!');
}).catch(function(err) {
console.error('Could not copy text: ', err);
// Fallback method if clipboard API fails
copyToClipboardFallback(resultsText);
});
} else {
copyToClipboardFallback(resultsText);
}
}
function copyToClipboardFallback(text) {
var textArea = document.createElement("textarea");
textArea.value = text;
textArea.style.position = "fixed"; // Avoid scrolling to bottom
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 ? 'Copied!' : 'Copy failed!';
alert(msg);
} catch (err) {
console.error('Fallback: Oops, unable to copy', err);
alert('Copy failed. Please manually copy the text.');
}
document.body.removeChild(textArea);
}
function updateShapeInputs() {
var shape = document.getElementById('shape').value;
selectedShape = shape; // Update global variable
document.getElementById('cuboidInputs').style.display = (shape === 'cuboid') ? 'block' : 'none';
document.getElementById('cylinderInputs').style.display = (shape === 'cylinder') ? 'block' : 'none';
document.getElementById('sphereInputs').style.display = (shape === 'sphere') ? 'block' : 'none';
// Clear relevant input values when shape changes
if (shape !== 'cuboid') {
document.getElementById('length').value = '';
document.getElementById('width').value = '';
document.getElementById('height').value = '';
}
if (shape !== 'cylinder') {
document.getElementById('cylinderDiameter').value = '';
document.getElementById('cylinderLength').value = '';
}
if (shape !== 'sphere') {
document.getElementById('sphereDiameter').value = '';
}
clearErrors(); // Clear errors when inputs change
}
function updateDensityInput() {
var densitySelection = document.getElementById('ironDensity').value;
document.getElementById('customDensityInput').style.display = (densitySelection === 'custom') ? 'block' : 'none';
}
// Initial setup for shape and density visibility
document.addEventListener('DOMContentLoaded', function() {
updateShapeInputs();
updateDensityInput();
// Initialize chart
updateChart(0, 7.87, 0);
});
document.getElementById('shape').addEventListener('change', updateShapeInputs);
document.getElementById('ironDensity').addEventListener('change', updateDensityInput);
// Charting Logic
var chartInstance = null; // To hold the chart instance
function updateChart(currentVolume, currentDensity, currentWeightKg) {
var canvas = document.getElementById('weightChart');
if (!canvas) return; // Exit if canvas element doesn't exist
var ctx = canvas.getContext('2d');
// Define densities to plot
var densities = {
'Pure Iron': 7.874,
'Wrought Iron': 7.85,
'Cast Iron': 7.87,
'Steel': 7.85
};
var volumesToConsider = [];
// Generate volumes from 1000 cm³ up to a reasonable max, or use currentVolume if it's larger
var maxVolume = Math.max(currentVolume * 1.5, 50000); // Scale based on current input or default
var step = maxVolume / 10;
for (var i = step; i 0) volumesToConsider.push(maxVolume); // Ensure at least one point if maxVolume is small
if (volumesToConsider.length > 10) { // Limit points for performance/clarity
var smallerSteps = [];
var stepSize = maxVolume / 10;
for (var i = stepSize; i 0 && currentWeightKg > 0) {
chartData.datasets.push({
label: 'Your Calculation (' + currentDensity.toFixed(3) + ' g/cm³)',
data: [{ x: currentVolume, y: currentWeightKg }], // Specific point
backgroundColor: 'rgba(40, 167, 69, 0.8)', // Success color
borderColor: 'rgba(40, 167, 69, 1)',
pointRadius: 7,
pointHoverRadius: 10,
fill: false,
tension: 0.1
});
}
// Destroy previous chart instance if it exists
if (chartInstance) {
chartInstance.destroy();
}
// Create the new chart
chartInstance = new Chart(ctx, {
type: 'line',
data: chartData,
options: {
responsive: true,
maintainAspectRatio: true,
plugins: {
title: {
display: true,
text: 'Iron Weight vs. Volume for Different Densities',
font: { size: 16 }
},
legend: {
position: 'top',
},
tooltip: {
callbacks: {
label: function(context) {
var label = context.dataset.label || ";
if (label) {
label += ': ';
}
if (context.parsed.x !== null) {
label += context.parsed.x.toFixed(0) + ' cm³';
}
if (context.parsed.y !== null) {
label += ' / ' + context.parsed.y.toFixed(2) + ' kg';
}
return label;
}
}
}
},
scales: {
x: {
title: {
display: true,
text: 'Volume (cm³)'
}
},
y: {
title: {
display: true,
text: 'Weight (kg)'
},
beginAtZero: true
}
}
}
});
}
// Helper function to generate random colors for chart lines
function getRandomColor() {
var letters = '0123456789ABCDEF';
var color = '#';
for (var i = 0; i < 6; i++) {
color += letters[Math.floor(Math.random() * 16)];
}
return color;
}
// Add event listeners for shape and density changes
document.getElementById('shape').addEventListener('change', function() {
updateShapeInputs();
// Recalculate if inputs are present to update chart immediately
var validation = validateInputs();
if (validation.isValid) {
calculateWeight();
}
});
document.getElementById('ironDensity').addEventListener('change', function() {
updateDensityInput();
// Recalculate if inputs are present to update chart immediately
var validation = validateInputs();
if (validation.isValid) {
calculateWeight();
}
});
// Add input event listeners for real-time updates and validation
var dimensionInputs = document.querySelectorAll('#calculatorForm input[type="number"]');
dimensionInputs.forEach(function(input) {
input.addEventListener('input', function() {
var validation = validateInputs();
if (validation.isValid) {
calculateWeight();
} else {
// If validation fails, hide results but keep errors displayed
document.getElementById('resultsContainer').style.display = 'none';
}
});
});
// Initial call to update chart with default values
updateChart(0, 7.87, 0);