Gold Scrap Value Calculator

Gold Scrap Value Calculator: Estimate Your Returns :root { –primary-color: #004a99; –secondary-color: #007bff; –success-color: #28a745; –danger-color: #dc3545; –warning-color: #ffc107; –info-color: #17a2b8; –light-color: #f8f9fa; –dark-color: #343a40; –text-color: #333; –border-color: #ccc; –shadow-color: rgba(0, 0, 0, 0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–light-color); color: var(–text-color); line-height: 1.6; margin: 0; padding: 0; display: flex; flex-direction: column; align-items: center; padding-top: 20px; padding-bottom: 40px; } .container { width: 100%; max-width: 960px; background-color: #fff; padding: 30px; border-radius: 8px; box-shadow: 0 4px 15px var(–shadow-color); display: flex; flex-direction: column; align-items: center; } h1, h2, h3 { color: var(–primary-color); text-align: center; margin-bottom: 20px; } h1 { font-size: 2.5em; margin-bottom: 10px; } h2 { font-size: 1.8em; margin-top: 30px; margin-bottom: 15px; } h3 { font-size: 1.4em; margin-top: 25px; margin-bottom: 10px; } .calculator-section { width: 100%; margin-bottom: 40px; padding: 25px; border: 1px solid var(–border-color); border-radius: 6px; background-color: var(–light-color); } .loan-calc-container { display: flex; flex-direction: column; gap: 15px; width: 100%; } .input-group { display: flex; flex-direction: column; gap: 5px; } .input-group label { font-weight: bold; color: var(–dark-color); font-size: 1.1em; } .input-group input[type="number"], .input-group select { padding: 10px; border: 1px solid var(–border-color); border-radius: 4px; font-size: 1em; width: 100%; box-sizing: border-box; } .input-group input[type="number"]:focus, .input-group select:focus { outline: none; border-color: var(–primary-color); box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2); } .input-group .helper-text { font-size: 0.9em; color: #6c757d; margin-top: 5px; } .error-message { color: var(–danger-color); font-size: 0.9em; margin-top: 5px; min-height: 1.2em; /* Reserve space to prevent layout shifts */ } .button-group { display: flex; gap: 10px; margin-top: 20px; justify-content: center; flex-wrap: wrap; } button { padding: 12px 25px; border: none; border-radius: 4px; cursor: pointer; font-size: 1.1em; font-weight: bold; transition: background-color 0.3s ease, transform 0.2s ease; } button.primary { background-color: var(–primary-color); color: white; } button.primary:hover { background-color: #003366; transform: translateY(-2px); } button.secondary { background-color: var(–secondary-color); color: white; } button.secondary:hover { background-color: #0056b3; transform: translateY(-2px); } button.reset { background-color: var(–warning-color); color: var(–dark-color); } button.reset:hover { background-color: #e0a800; transform: translateY(-2px); } button.copy { background-color: var(–info-color); color: white; } button.copy:hover { background-color: #117a8b; transform: translateY(-2px); } #results { margin-top: 30px; padding: 20px; border: 1px solid var(–border-color); border-radius: 6px; background-color: var(–light-color); width: 100%; box-sizing: border-box; text-align: center; } #results h3 { margin-top: 0; color: var(–dark-color); } .result-item { margin-bottom: 15px; font-size: 1.1em; } .result-item strong { color: var(–primary-color); } .highlight-result { font-size: 2em; font-weight: bold; color: var(–success-color); margin-top: 10px; padding: 15px; background-color: var(–light-color); border: 2px dashed var(–success-color); border-radius: 6px; display: inline-block; min-width: 80%; } .key-assumptions { margin-top: 20px; font-size: 0.9em; color: #6c757d; text-align: left; } .key-assumptions strong { color: var(–dark-color); } table { width: 100%; border-collapse: collapse; margin-top: 25px; } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid var(–border-color); } thead { background-color: var(–primary-color); color: white; } th { font-weight: bold; } tbody tr:nth-child(even) { background-color: #f2f2f2; } canvas { margin-top: 30px; width: 100%; max-width: 600px; /* Limit canvas size for better display */ display: block; margin-left: auto; margin-right: auto; } .chart-caption { font-size: 0.9em; color: #6c757d; text-align: center; margin-top: 10px; } .article-content { width: 100%; margin-top: 40px; background-color: #fff; padding: 30px; border-radius: 8px; box-shadow: 0 4px 15px var(–shadow-color); display: flex; flex-direction: column; align-items: center; } .article-content p, .article-content ul, .article-content ol { max-width: 800px; /* Ensure paragraph readability */ text-align: left; } .article-content ul, .article-content ol { margin-left: 20px; margin-bottom: 20px; } .article-content li { margin-bottom: 10px; } .article-content a { color: var(–primary-color); text-decoration: none; font-weight: bold; } .article-content a:hover { text-decoration: underline; } .faq-section .faq-item { margin-bottom: 20px; border-bottom: 1px dashed var(–border-color); padding-bottom: 15px; } .faq-section .faq-item:last-child { border-bottom: none; } .faq-question { font-weight: bold; color: var(–primary-color); cursor: pointer; margin-bottom: 5px; } .faq-answer { display: none; /* Hidden by default */ color: #555; margin-left: 10px; } .faq-answer.visible { display: block; } .related-links ul { list-style: none; padding: 0; } .related-links li { margin-bottom: 15px; font-size: 1.1em; } /* Responsive adjustments */ @media (max-width: 768px) { h1 { font-size: 2em; } h2 { font-size: 1.5em; } .container, .article-content { padding: 20px; } button.primary, button.secondary, button.reset, button.copy { width: 100%; margin-bottom: 10px; } .button-group { flex-direction: column; align-items: center; } .highlight-result { font-size: 1.6em; min-width: 100%; } th, td { padding: 10px 8px; font-size: 0.95em; } }

Gold Scrap Value Calculator

Quickly estimate the real-time value of your gold scrap.

Calculate Your Gold Scrap Value

Enter the total weight of your gold items in grams (g).
24K (Pure Gold) 22K 18K 14K 10K 9K 8K
Select the Karat value representing the gold's purity.
Enter the current market price of pure gold per gram in your local currency.
Enter any fees charged by the refiner or buyer (e.g., 5% for 5).

Your Estimated Gold Scrap Value

Estimated Pure Gold Content: — g
Gross Scrap Value:
Estimated Fees:
Key Assumptions:
  • Based on provided weight and Karat purity.
  • Current Gold Price: per gram.
  • Processing Fee: %.
Formula: Net Value = (Weight in grams * Purity Factor * Current Gold Price) * (1 – (Processing Fee / 100))

What is the Gold Scrap Value Calculator?

{primary_keyword} is a vital tool for anyone looking to understand the intrinsic worth of their old, broken, or unwanted gold items. This calculator helps individuals and businesses quickly estimate the market value of gold scrap based on its weight, purity (karat), and the current spot price of gold. It's designed to provide transparency and empower users before they sell their gold to jewelers, pawn shops, or refiners. Whether you have a pile of old jewelry, dental gold, or even gold-filled items, this tool can offer a baseline valuation.

This Gold Scrap Value Calculator is ideal for:

  • Homeowners decluttering and finding old gold items.
  • Individuals inheriting gold jewelry or coins.
  • Jewelers assessing scrap gold for trade-ins or recycling.
  • Anyone curious about the value of their gold possessions.

A common misconception is that the listed Karat value directly translates to the exact percentage of gold. While it's a close approximation, the actual gold content can vary slightly, and the calculator uses standard purity factors. Another misconception is that the scrap value is the same as retail value; scrap value typically reflects the melt value plus a small premium, not the potential value of a crafted piece.

Gold Scrap Value Calculator Formula and Mathematical Explanation

The calculation for the {primary_keyword} is a straightforward process that determines the amount of pure gold within your scrap and then applies market prices and fees. Here's a breakdown of the formula and its components:

The core formula is:

Net Scrap Value = (Pure Gold Content in Grams * Current Gold Price per Gram) * (1 – (Processing Fee Percentage / 100))

Let's break down each variable:

Variable Explanations:

Variable Meaning Unit Typical Range
Weight of Gold Scrap The total physical weight of the gold items being valued. Grams (g) 0.1 g to 1000+ g
Gold Purity (Karat) A measure of gold's fineness. 24K is pure gold. Other Karats represent a fraction of pure gold. Karat (K) 8K to 24K
Purity Factor The decimal equivalent of the Karat purity (e.g., 18K / 24K = 0.75). This represents the proportion of pure gold. Decimal (0-1) 0.333 (8K) to 1.000 (24K)
Current Gold Price The real-time market price for one gram of pure (24K) gold. This fluctuates daily. Currency per Gram (e.g., USD/g, EUR/g) Varies greatly, e.g., $60 – $80 USD/g
Processing Fee Percentage The percentage deducted by the buyer or refiner to cover their costs (assaying, refining, handling). Percentage (%) 0% to 20%
Pure Gold Content Calculated as: Weight of Gold Scrap * Purity Factor. Grams (g) Derived from inputs
Gross Scrap Value Calculated as: Pure Gold Content * Current Gold Price. This is the value before fees. Currency Derived from inputs
Estimated Fees Calculated as: Gross Scrap Value * (Processing Fee Percentage / 100). Currency Derived from inputs
Net Scrap Value The final estimated value after deducting fees. Currency Derived from inputs

Practical Examples (Real-World Use Cases)

Let's illustrate the {primary_keyword} with a couple of practical scenarios:

Example 1: Selling Old Jewelry

Sarah has a broken 14K gold necklace weighing 25 grams. The current market price for pure gold is $75 per gram, and the jeweler charges a 5% processing fee.

  • Inputs:
    • Weight: 25 g
    • Purity: 14K
    • Current Gold Price: $75/g
    • Processing Fee: 5%
  • Calculation:
    • Purity Factor (14K): 14 / 24 = 0.5833
    • Pure Gold Content: 25 g * 0.5833 = 14.58 g
    • Gross Scrap Value: 14.58 g * $75/g = $1093.50
    • Estimated Fees: $1093.50 * (5 / 100) = $54.68
    • Net Scrap Value: $1093.50 – $54.68 = $1038.82
  • Interpretation: Sarah can expect to receive approximately $1038.82 for her broken 14K gold necklace, after the jeweler's fees. This is a realistic estimate for the melt value of the gold content.

Example 2: Valuing a Small Lot of Gold Coins

John has 3 old gold coins, each weighing 5 grams, and they are marked as 22K. The current price of pure gold is $72 per gram. The assay office charges a flat 3% fee for valuation and processing.

  • Inputs:
    • Weight: 15 g (3 coins * 5 g/coin)
    • Purity: 22K
    • Current Gold Price: $72/g
    • Processing Fee: 3%
  • Calculation:
    • Purity Factor (22K): 22 / 24 = 0.9167
    • Pure Gold Content: 15 g * 0.9167 = 13.75 g
    • Gross Scrap Value: 13.75 g * $72/g = $990.00
    • Estimated Fees: $990.00 * (3 / 100) = $29.70
    • Net Scrap Value: $990.00 – $29.70 = $960.30
  • Interpretation: John's 15 grams of 22K gold coins are worth an estimated $960.30 after the processing fee. This helps him decide if the offer from the assay office is fair.

How to Use This Gold Scrap Value Calculator

Using the {primary_keyword} is simple and takes just a few moments. Follow these steps:

  1. Measure the Weight: Accurately weigh your gold scrap items using a digital scale in grams. Enter this figure into the "Weight of Gold Scrap" field.
  2. Determine Purity: Identify the Karat (K) marking on your gold items. Common values are 24K (pure), 22K, 18K, 14K, and 10K. Select the appropriate value from the "Gold Purity (Karat)" dropdown. If unsure, err on the side of a lower Karat value or consult a professional.
  3. Find Current Gold Price: Check a reliable financial news source, precious metals dealer website, or bullion exchange for the current spot price of pure gold per gram. Enter this value into the "Current Gold Price" field. Remember to use your local currency.
  4. Enter Processing Fee: Input the percentage that the buyer or refiner will deduct for their services. This is often found in their terms or can be asked directly. Enter '0' if no fee is applicable or if you are just assessing pure market value.
  5. Calculate: Click the "Calculate Value" button.

Reading and Using the Results:

  • Pure Gold Content: Shows how many grams of actual pure gold are in your scrap.
  • Gross Scrap Value: This is the total market value of the pure gold content before any deductions.
  • Estimated Fees: The approximate amount that will be deducted by the buyer.
  • Net Scrap Value: The final estimated amount you can expect to receive. This is the most crucial figure for negotiation or decision-making.

Use these results to compare offers from different buyers, negotiate a fair price, or simply understand the intrinsic value of your gold.

Key Factors That Affect Gold Scrap Value Results

Several factors influence the final value calculated and the actual price you might receive for your gold scrap. Understanding these is crucial for accurate expectations:

  1. Gold Purity (Karat): This is paramount. Higher Karat gold (closer to 24K) contains more pure gold and thus has a higher intrinsic value per gram. A 14K item is worth significantly less than an 18K item of the same weight.
  2. Weight of Scrap: Naturally, the heavier the gold scrap, the higher the total value, assuming consistent purity and market price. Accurate weighing is essential.
  3. Current Market Price of Gold: The price of gold fluctuates daily based on global economic conditions, geopolitical events, and market sentiment. A higher spot price will directly increase the scrap value. This is often referred to as the 'spot price'.
  4. Buyer's Fees and Spreads: Most buyers deduct fees for assaying (testing purity), refining, and operational costs. They also apply a 'spread' – the difference between the price they pay for scrap and the price they can sell refined gold for. These deductions reduce the net amount received.
  5. Assay Accuracy: The accuracy of the purity testing (assaying) significantly impacts the valuation. Reputable buyers use precise methods. If the assay underestimates purity, you'll receive less.
  6. Form of Gold: While this calculator focuses on melt value, sometimes items like high-purity gold coins or bars might fetch a small premium over pure scrap value due to their recognized form, though this is less common for mixed scrap.
  7. Location and Buyer Type: Prices and fees can vary by region and the type of buyer (e.g., local jeweler, online refiner, major bullion dealer). Some may offer better rates for larger quantities.
  8. Hallmarking and Authenticity: While scrap value is primarily about metal content, clear hallmarks indicating purity can speed up the assessment process for buyers. However, for scrap, the assay test is the definitive measure.

Frequently Asked Questions (FAQ)

What is the difference between scrap gold value and retail jewelry value?
Scrap gold value is based on the melt value of the precious metal content, minus any refining or buyer fees. Retail jewelry value includes the cost of craftsmanship, brand markup, gemstones, and design, which is typically much higher than the scrap value.
Can I sell gold plating or gold-filled items using this calculator?
This calculator is designed for solid gold items (marked with Karat). Gold-plated or gold-filled items contain only a very thin layer of gold and have minimal scrap value, often negligible. They usually aren't accepted by scrap gold buyers or are valued at a much lower rate.
How accurate is the "Current Gold Price" input?
The accuracy depends entirely on the data you input. Use a reliable, up-to-the-minute source for the spot price of gold per gram. Prices can change rapidly.
What does 24K, 18K, 14K mean?
Karat (K) measures gold purity. 24K is 99.9% pure gold. 18K means 18 parts out of 24 are gold (75%). 14K means 14 parts out of 24 are gold (approx. 58.3%).
Should I include gemstones or other materials in the weight?
No, you should only weigh the gold itself. Remove any stones, pearls, or non-gold components before weighing your scrap. Buyers will deduct or ignore the weight of non-gold materials.
What if my gold is not hallmarked with a Karat?
If there's no visible hallmark, a buyer will need to perform an assay test to determine the purity. For estimation purposes, if you suspect it's a certain Karat, use that value, but be prepared for the buyer's test result to potentially differ.
Can I use this calculator for platinum or silver scrap?
No, this calculator is specifically for gold. Platinum and silver have different market prices and purity standards (e.g., fineness for silver/platinum). You would need a dedicated calculator for those precious metals.
Is the Net Scrap Value the final amount I will be paid?
The Net Scrap Value is an estimate based on the inputs. The final amount paid by a buyer may differ slightly due to variations in assay testing, the buyer's specific fee structure, and the exact gold price at the time of transaction. It serves as a strong benchmark.

Related Tools and Internal Resources

function validateInput(inputId, errorId, min, max, allowEmpty = false) { var input = document.getElementById(inputId); var errorElement = document.getElementById(errorId); var value = parseFloat(input.value); if (errorElement) { errorElement.textContent = "; // Clear previous error } if (input.value === "" && !allowEmpty) { if (errorElement) errorElement.textContent = 'This field is required.'; return false; } if (input.value !== "" && isNaN(value)) { if (errorElement) errorElement.textContent = 'Please enter a valid number.'; return false; } if (value max && input.value !== "") { if (errorElement) errorElement.textContent = 'Value out of range.'; return false; } return true; } function formatCurrency(amount) { if (isNaN(amount) || amount === null) return '–'; // Attempt to detect locale for currency formatting, default to 'en-US' var locale = navigator.language || 'en-US'; try { return new Intl.NumberFormat(locale, { style: 'currency', currency: 'USD' // Default currency, can be adjusted if locale implies others }).format(amount); } catch (e) { // Fallback for environments where Intl is not fully supported or locale is invalid return '$' + amount.toFixed(2); } } function calculateGoldValue() { var weightInput = document.getElementById('goldWeight'); var puritySelect = document.getElementById('goldPurity'); var priceInput = document.getElementById('currentGoldPrice'); var feeInput = document.getElementById('processingFee'); var errors = { weight: !validateInput('goldWeight', 'goldWeightError', 0), price: !validateInput('currentGoldPrice', 'currentGoldPriceError', 0), fee: !validateInput('processingFee', 'processingFeeError', 0, 100) }; if (errors.weight || errors.price || errors.fee) { clearResults(); return; } var weight = parseFloat(weightInput.value); var purityKarat = parseInt(puritySelect.value); var pricePerGram = parseFloat(priceInput.value); var feePercentage = parseFloat(feeInput.value); var purityFactor = purityKarat / 24.0; var pureGoldContent = weight * purityFactor; var grossScrapValue = pureGoldContent * pricePerGram; var estimatedFees = grossScrapValue * (feePercentage / 100.0); var netScrapValue = grossScrapValue – estimatedFees; // Update Results Display document.getElementById('pureGoldContentResult').textContent = pureGoldContent.toFixed(2) + ' g'; document.getElementById('grossScrapValueResult').textContent = formatCurrency(grossScrapValue); document.getElementById('estimatedFeesResult').textContent = formatCurrency(estimatedFees); document.getElementById('netScrapValueResult').textContent = formatCurrency(netScrapValue); // Update Key Assumptions document.getElementById('assumedGoldPrice').textContent = formatCurrency(pricePerGram); document.getElementById('assumedProcessingFee').textContent = feePercentage.toFixed(1); updateChart([ { name: 'Pure Gold Content', value: pureGoldContent, unit: 'g' }, { name: 'Gross Scrap Value', value: grossScrapValue, unit: formatCurrency(0).replace('0.00',") }, // Extract currency symbol { name: 'Net Scrap Value', value: netScrapValue, unit: formatCurrency(0).replace('0.00',") } ]); } function clearResults() { document.getElementById('pureGoldContentResult').textContent = '– g'; document.getElementById('grossScrapValueResult').textContent = '–'; document.getElementById('estimatedFeesResult').textContent = '–'; document.getElementById('netScrapValueResult').textContent = '–'; document.getElementById('assumedGoldPrice').textContent = '–'; document.getElementById('assumedProcessingFee').textContent = '–'; // Clear chart if implemented } function resetCalculator() { document.getElementById('goldWeight').value = "; document.getElementById('goldPurity').value = '18'; // Default to 18K document.getElementById('currentGoldPrice').value = "; document.getElementById('processingFee').value = '5'; // Default fee // Clear errors document.getElementById('goldWeightError').textContent = "; document.getElementById('goldPurityError').textContent = "; document.getElementById('currentGoldPriceError').textContent = "; document.getElementById('processingFeeError').textContent = "; clearResults(); // Optionally reset chart to default state updateChart(null); // Pass null to reset chart } function copyResults() { var pureGold = document.getElementById('pureGoldContentResult').textContent; var grossValue = document.getElementById('grossScrapValueResult').textContent; var fees = document.getElementById('estimatedFeesResult').textContent; var netValue = document.getElementById('netScrapValueResult').textContent; var goldPrice = document.getElementById('assumedGoldPrice').textContent; var processingFee = document.getElementById('assumedProcessingFee').textContent; var assumptions = `Key Assumptions:\n- Current Gold Price: ${goldPrice} per gram\n- Processing Fee: ${processingFee}%\n\nFormula: Net Value = (Weight in grams * Purity Factor * Current Gold Price) * (1 – (Processing Fee / 100))`; var copyText = `— Gold Scrap Value Results —\n\n` + `Pure Gold Content: ${pureGold}\n` + `Gross Scrap Value: ${grossValue}\n` + `Estimated Fees: ${fees}\n` + `Net Scrap Value: ${netValue}\n\n` + `${assumptions}`; // Use a temporary textarea for copying var textArea = document.createElement("textarea"); textArea.value = copyText; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied to clipboard!' : 'Failed to copy results.'; alert(msg); // Simple feedback } catch (err) { alert('Failed to copy results.'); } document.body.removeChild(textArea); } // — Chart Implementation — var chartCanvas = document.getElementById('valueChart'); var chartInstance = null; function updateChart(data) { if (!chartCanvas) { // Create canvas if it doesn't exist chartCanvas = document.createElement('canvas'); chartCanvas.id = 'valueChart'; document.getElementById('results').insertAdjacentElement('afterend', chartCanvas); // Ensure chart context is obtained after canvas is in the DOM chartInstance = chartCanvas.getContext('2d'); } else if (!chartInstance) { chartInstance = chartCanvas.getContext('2d'); } if (!chartInstance) { console.error("Could not get canvas context."); return; } // Clear previous chart chartInstance.clearRect(0, 0, chartCanvas.width, chartCanvas.height); if (!data || data.length === 0) { chartInstance.fillStyle = '#6c757d'; chartInstance.font = '16px Arial'; chartInstance.textAlign = 'center'; chartInstance.fillText('Enter values to see chart', chartCanvas.width / 2, chartCanvas.height / 2); return; } // Chart dimensions and margins var canvasWidth = chartCanvas.clientWidth; var canvasHeight = 300; // Fixed height for the chart area chartCanvas.height = canvasHeight; // Set canvas height attribute var margin = { top: 30, right: 30, bottom: 60, left: 80 }; var chartWidth = canvasWidth – margin.left – margin.right; var chartHeight = canvasHeight – margin.top – margin.bottom; // Find max value for scaling, considering all series for consistent scaling var maxValue = 0; data.forEach(function(series) { if (series.value > maxValue) { maxValue = series.value; } }); // Add some padding to the max value maxValue = maxValue * 1.1; if (maxValue === 0) maxValue = 100; // Prevent division by zero if all values are 0 var scaleY = chartHeight / maxValue; // Colors for bars var colors = ['#004a99', '#28a745', '#ffc107']; // Primary, Success, Warning // Draw Bars var barWidth = chartWidth / (data.length * 1.5); // Adjust spacing var startX = margin.left + (chartWidth – (data.length * barWidth + (data.length – 1) * (barWidth * 0.5))) / 2; data.forEach(function(series, index) { var barHeight = series.value * scaleY; var x = startX + index * (barWidth + barWidth * 0.5); var y = margin.top + chartHeight – barHeight; var color = colors[index % colors.length]; // Draw bar chartInstance.fillStyle = color; chartInstance.fillRect(x, y, barWidth, barHeight); // Draw value label above bar chartInstance.fillStyle = '#333′; chartInstance.font = '14px Arial'; chartInstance.textAlign = 'center'; chartInstance.fillText(series.value.toFixed(2) + ' ' + series.unit, x + barWidth / 2, y – 10); // Draw series name label below bar chartInstance.fillStyle = '#333′; chartInstance.font = '12px Arial'; chartInstance.textAlign = 'center'; chartInstance.fillText(series.name, x + barWidth / 2, margin.top + chartHeight + 20); }); // Draw Y-axis labels and line chartInstance.beginPath(); chartInstance.moveTo(margin.left, margin.top); chartInstance.lineTo(margin.left, margin.top + chartHeight); chartInstance.strokeStyle = '#ccc'; chartInstance.stroke(); chartInstance.fillStyle = '#666′; chartInstance.font = '12px Arial'; chartInstance.textAlign = 'right'; var gridLines = 5; for (var i = 0; i <= gridLines; i++) { var value = (maxValue / gridLines) * i; var yPos = margin.top + chartHeight – (value * scaleY); chartInstance.fillText(value.toFixed(0), margin.left – 10, yPos + 5); chartInstance.beginPath(); chartInstance.moveTo(margin.left – 5, yPos); chartInstance.lineTo(margin.left, yPos); chartInstance.stroke(); } // Chart Caption var chartCaption = document.createElement('div'); chartCaption.className = 'chart-caption'; chartCaption.textContent = 'Comparison of Gold Content and Estimated Values'; // Ensure caption is placed after the canvas if (!chartCanvas.nextElementSibling || !chartCanvas.nextElementSibling.classList.contains('chart-caption')) { chartCanvas.parentNode.insertBefore(chartCaption, chartCanvas.nextSibling); } else { chartCanvas.nextElementSibling.textContent = 'Comparison of Gold Content and Estimated Values'; } } // Initial call to setup default chart state or calculate if defaults are set document.addEventListener('DOMContentLoaded', function() { var chartContainer = document.createElement('div'); chartContainer.style.width = '100%'; chartContainer.style.maxWidth = '960px'; // Match container max-width chartContainer.style.margin = '30px auto'; chartContainer.style.padding = '0 20px'; // Add padding for smaller screens chartContainer.style.boxSizing = 'border-box'; var canvas = document.createElement('canvas'); canvas.id = 'valueChart'; canvas.style.width = '100%'; canvas.style.height = '300px'; // Initial height, JS will adjust chartContainer.appendChild(canvas); // Insert chart after the results div var resultsDiv = document.getElementById('results'); if(resultsDiv) { resultsDiv.parentNode.insertBefore(chartContainer, resultsDiv.nextSibling); } updateChart(null); // Initialize chart with no data message // Add click listeners for FAQ toggles var faqQuestions = document.querySelectorAll('.faq-question'); faqQuestions.forEach(function(question) { question.addEventListener('click', function() { var answer = this.nextElementSibling; answer.classList.toggle('visible'); }); }); // Trigger initial calculation if inputs have default values if (document.getElementById('goldWeight').value || document.getElementById('goldPurity').value || document.getElementById('currentGoldPrice').value || document.getElementById('processingFee').value) { calculateGoldValue(); } }); // Global reference for chart canvas element for ease of use in updateChart var chartCanvas = document.getElementById('valueChart');

Leave a Comment