How to Calculate Gold Carat Rate

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Gold Carat Rate Calculator – Calculate Purity & Price :root { –primary-color: #d4af37; /* Gold color */ –secondary-color: #333; –bg-color: #f9f9f9; –border-radius: 8px; –spacing: 20px; } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; background-color: var(–bg-color); } .calculator-container { background: #fff; padding: 30px; border-radius: var(–border-radius); box-shadow: 0 4px 15px rgba(0,0,0,0.1); margin-bottom: 40px; border-top: 5px solid var(–primary-color); } h1, h2, h3 { color: var(–secondary-color); } h1 { text-align: center; margin-bottom: 30px; } .input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; } @media (max-width: 768px) { .input-grid { grid-template-columns: 1fr; } } .form-group { margin-bottom: 20px; } label { display: block; margin-bottom: 8px; font-weight: 600; } input, select { width: 100%; padding: 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 16px; box-sizing: border-box; } input:focus, select:focus { outline: none; border-color: var(–primary-color); box-shadow: 0 0 5px rgba(212, 175, 55, 0.3); } button.calc-btn { background-color: var(–primary-color); color: white; border: none; padding: 15px 30px; font-size: 18px; font-weight: bold; border-radius: 4px; cursor: pointer; width: 100%; margin-top: 10px; transition: background-color 0.3s; } button.calc-btn:hover { background-color: #c5a028; } .results-section { margin-top: 30px; background-color: #fcfbf5; padding: 20px; border-radius: var(–border-radius); border: 1px solid #eee; display: none; } .result-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid #eee; } .result-row:last-child { border-bottom: none; font-size: 1.2em; font-weight: bold; color: var(–primary-color); border-top: 2px solid #ddd; margin-top: 10px; padding-top: 15px; } .content-section { background: #fff; padding: 30px; border-radius: var(–border-radius); box-shadow: 0 2px 10px rgba(0,0,0,0.05); } .content-section p { margin-bottom: 15px; } .content-section ul { margin-bottom: 20px; padding-left: 20px; } .formula-box { background-color: #eee; padding: 15px; border-left: 4px solid var(–primary-color); font-family: monospace; margin: 20px 0; } .error-msg { color: red; font-size: 14px; margin-top: 5px; display: none; }

Gold Carat Rate Calculator

24K (99.9% Pure) 22K (91.6% Pure) 21K (87.5% Pure) 18K (75.0% Pure) 14K (58.3% Pure) 10K (41.7% Pure) 9K (37.5% Pure)
Please enter valid positive numbers for all fields.

Valuation Breakdown

Purity Percentage: 0%
Rate per Gram (22K): 0.00
Base Gold Value: 0.00
Making Charges: 0.00
Tax Amount: 0.00
Total Final Price: 0.00

How to Calculate Gold Carat Rate

Understanding how gold prices are calculated is essential whether you are buying jewellery, investing in coins, or selling old gold. The price of gold jewellery isn't just determined by the weight; it heavily depends on the purity (Carat), current market rates, making charges, and taxes. This guide explains the mathematics behind gold valuation.

What is a Carat (K)?

In the context of gold, a Carat (often abbreviated as K or Kt) is a unit of purity. It measures the ratio of pure gold to other metals (alloys) mixed in. Pure gold is defined as 24 Carat. Because pure gold is too soft for durable jewellery, it is often mixed with metals like copper, silver, nickel, or zinc to create alloys of varying strength and color.

  • 24K: 99.9% Pure Gold (Too soft for most jewellery, used for coins/bars).
  • 22K: 91.6% Pure Gold (Standard for jewellery in many Asian countries).
  • 18K: 75.0% Pure Gold (Standard for diamond/stone-studded jewellery).
  • 14K: 58.3% Pure Gold (Common in the US and for everyday wear).

The Gold Calculation Formula

To calculate the value of a specific carat of gold, you first need to determine its percentage purity based on the 24K benchmark.

Purity Percentage Formula:
Purity % = (Carat / 24) × 100

Once you have the purity, you can calculate the rate per gram for your specific carat using the current market price of 24K gold. Note that market rates are often quoted per 10 grams (tola) or per ounce, so you must first convert this to a per-gram rate.

Price Calculation Formula:
1. Rate of 1g 24K Gold = (Rate of 10g 24K) / 10
2. Rate of 1g XK Gold = Rate of 1g 24K × (X / 24)
3. Base Value = Rate of 1g XK Gold × Weight in grams

Example Calculation

Let's assume the market rate for 24K gold is 60,000 per 10 grams. You want to buy a 22K gold ring weighing 5 grams.

  1. Find 1g 24K Rate: 60,000 / 10 = 6,000 per gram.
  2. Calculate 22K Factor: 22 / 24 = 0.9166 (91.6%).
  3. Find 1g 22K Rate: 6,000 × 0.9166 = 5,500 per gram.
  4. Base Gold Value: 5,500 × 5 grams = 27,500.

Additional Costs: Making Charges and Taxes

The base gold value is rarely the final price. Jewellers add labor costs (making charges) and the government applies taxes (VAT or GST).

  • Making Charges: These cover the cost of craftsmanship. They can be a flat fee per gram or a percentage of the gold value (usually between 8% to 25%).
  • Tax: A percentage applied to the sum of the gold value and making charges.

Final Price Formula: Base Gold Value + Making Charges + Tax = Total Cost.

function calculateGoldRate() { // Get Input Values var rate24k_10g = document.getElementById('goldRate24k').value; var carat = document.getElementById('targetCarat').value; var weight = document.getElementById('goldWeight').value; var makingChargesPct = document.getElementById('makingCharges').value; var taxPct = document.getElementById('taxRate').value; var errorDisplay = document.getElementById('errorDisplay'); var resultsSection = document.getElementById('results'); // Basic Validation if (rate24k_10g === "" || weight === "" || rate24k_10g < 0 || weight < 0) { errorDisplay.style.display = "block"; resultsSection.style.display = "none"; return; } else { errorDisplay.style.display = "none"; resultsSection.style.display = "block"; } // Parsing numbers var pricePer10g = parseFloat(rate24k_10g); var selectedCarat = parseFloat(carat); var weightGrams = parseFloat(weight); var mcPercent = parseFloat(makingChargesPct) || 0; var taxPercent = parseFloat(taxPct) || 0; // 1. Calculate Price of 1 gram of 24K Gold var pricePer1g_24k = pricePer10g / 10; // 2. Calculate Purity Factor var purityFactor = selectedCarat / 24; var purityPercentage = purityFactor * 100; // 3. Calculate Rate per gram for the selected Carat var ratePerGram_Selected = pricePer1g_24k * purityFactor; // 4. Calculate Base Gold Value var baseValue = ratePerGram_Selected * weightGrams; // 5. Calculate Making Charges Amount var makingChargesAmount = baseValue * (mcPercent / 100); // 6. Calculate Taxable Subtotal var subTotal = baseValue + makingChargesAmount; // 7. Calculate Tax Amount var taxAmount = subTotal * (taxPercent / 100); // 8. Calculate Final Total var finalTotal = subTotal + taxAmount; // Update UI document.getElementById('resPurity').innerText = purityPercentage.toFixed(2) + "%"; document.getElementById('resCaratLabel').innerText = selectedCarat + "K"; document.getElementById('resRatePerGram').innerText = ratePerGram_Selected.toFixed(2); document.getElementById('resBaseValue').innerText = baseValue.toFixed(2); document.getElementById('resMakingCharges').innerText = makingChargesAmount.toFixed(2); document.getElementById('resTax').innerText = taxAmount.toFixed(2); document.getElementById('resTotal').innerText = finalTotal.toFixed(2); }

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