body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
line-height: 1.6;
color: #333;
max-width: 1200px;
margin: 0 auto;
padding: 20px;
}
.calculator-container {
background-color: #f9f9f9;
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 30px;
margin-bottom: 40px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.calculator-title {
text-align: center;
color: #2c3e50;
margin-bottom: 25px;
font-size: 24px;
font-weight: 700;
}
.input-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 768px) {
.input-grid {
grid-template-columns: 1fr;
}
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #555;
}
.input-group input, .input-group select {
width: 100%;
padding: 12px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
}
.btn-calculate {
display: block;
width: 100%;
background-color: #d4af37; /* Gold color */
color: white;
border: none;
padding: 15px;
font-size: 18px;
font-weight: bold;
border-radius: 4px;
cursor: pointer;
margin-top: 20px;
transition: background 0.3s;
}
.btn-calculate:hover {
background-color: #b5952f;
}
.result-box {
margin-top: 30px;
background-color: #fff;
border: 1px solid #ddd;
border-radius: 4px;
padding: 20px;
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-weight: bold;
font-size: 1.2em;
color: #d4af37;
}
.article-content {
background: #fff;
padding: 20px;
}
h2 {
color: #2c3e50;
margin-top: 30px;
border-bottom: 2px solid #d4af37;
padding-bottom: 10px;
display: inline-block;
}
h3 {
color: #444;
margin-top: 25px;
}
.formula-box {
background-color: #f0f4f8;
padding: 15px;
border-left: 5px solid #d4af37;
font-family: monospace;
margin: 15px 0;
}
table {
width: 100%;
border-collapse: collapse;
margin: 20px 0;
}
table th, table td {
border: 1px solid #ddd;
padding: 12px;
text-align: left;
}
table th {
background-color: #f2f2f2;
}
function calculateGoldPrice() {
// Get Input Elements
var marketPriceInput = document.getElementById('marketPrice');
var goldWeightInput = document.getElementById('goldWeight');
var goldPurityInput = document.getElementById('goldPurity');
var makingChargesInput = document.getElementById('makingCharges');
var taxRateInput = document.getElementById('taxRate');
var resultBox = document.getElementById('result');
// Parse Values
var marketPrice10g = parseFloat(marketPriceInput.value);
var weight = parseFloat(goldWeightInput.value);
var purity = parseFloat(goldPurityInput.value);
var makingPercent = parseFloat(makingChargesInput.value);
var taxPercent = parseFloat(taxRateInput.value);
// Validation
if (isNaN(marketPrice10g) || isNaN(weight) || isNaN(makingPercent) || isNaN(taxPercent) || marketPrice10g <= 0 || weight <= 0) {
alert("Please enter valid positive numbers for Market Price and Weight.");
resultBox.style.display = 'none';
return;
}
// Logic Implementation
// 1. Calculate Price for 1 Gram of 24K Gold
var pricePerGram24k = marketPrice10g / 10;
// 2. Calculate Purity Factor (e.g., 22K is 22/24)
var purityFactor = purity / 24;
// 3. Calculate Rate per Gram for Selected Purity
var ratePerGramActual = pricePerGram24k * purityFactor;
// 4. Calculate Base Material Cost
var materialCost = ratePerGramActual * weight;
// 5. Calculate Making Charges (Percentage of Material Cost)
var makingCost = materialCost * (makingPercent / 100);
// 6. Subtotal before Tax
var subtotal = materialCost + makingCost;
// 7. Calculate Tax Amount
var taxAmount = subtotal * (taxPercent / 100);
// 8. Final Total
var finalTotal = subtotal + taxAmount;
// Display Results
document.getElementById('resPerGram').innerText = ratePerGramActual.toFixed(2);
document.getElementById('resMaterialCost').innerText = materialCost.toFixed(2);
document.getElementById('resMakingCharges').innerText = makingCost.toFixed(2);
document.getElementById('resTax').innerText = taxAmount.toFixed(2);
document.getElementById('resTotal').innerText = finalTotal.toFixed(2);
resultBox.style.display = 'block';
}
Gold Rate Calculation Formula Explained
Buying gold jewellery is a significant investment, yet many buyers are unaware of how the final price on their invoice is derived. The price of a gold ornament isn't just the weight multiplied by the market rate; it involves purity calculations, making charges (wastage), and government taxes. This guide breaks down the Gold Rate Calculation Formula so you can verify your jeweler's quote.
The Core Formula
The standard formula used by jewelers across the globe to calculate the final price of gold jewellery is:
Final Price = (Price of Gold × Weight) + Making Charges + GST
However, to use this formula accurately, you must first determine the "Price of Gold" based on the purity of the item you are buying.
Step-by-Step Calculation Logic
1. Determine the Price Per Gram (Adjusted for Purity)
Market rates are typically quoted for 24 Karat (24K) gold per 10 grams. However, jewellery is rarely made of 24K gold because it is too soft. Most jewellery is 22K (91.6% pure) or 18K (75% pure).
Step A: Convert the 10g market rate to a 1g rate.
Price of 1g (24K) = Market Rate (per 10g) / 10
Step B: Adjust for the Karat you are buying.
Your Gold Rate = Price of 1g (24K) × (Selected Karat / 24)
Example: If 24K gold is 60,000 per 10g, then 1g is 6,000. For 22K jewellery, the rate is 6,000 × (22/24) = 5,500 per gram.
2. Calculate the Material Cost
Multiply the adjusted rate by the weight of your item.
Material Cost = Your Gold Rate × Weight in Grams
3. Add Making Charges (Labor/Wastage)
Making charges cover the cost of labor and the gold wasted during the manufacturing process. This is usually charged as a percentage of the material cost or a flat fee per gram.
Making Charges = Material Cost × Making Charge %
4. Add Taxes (GST)
Finally, taxes are applied to the sum of the material cost and the making charges. In many regions (like India), this is 3% GST.
Tax = (Material Cost + Making Charges) × Tax Rate %
Understanding Gold Purity (Karats)
| Karat |
Purity % |
Usage |
| 24K |
99.9% |
Bullion, Bars, Coins (Too soft for jewellery) |
| 22K |
91.6% |
Standard Gold Jewellery, Plain Bands |
| 18K |
75.0% |
Diamond and Stone-studded Jewellery |
| 14K |
58.3% |
High-durability everyday wear (common in US/Europe) |
Real-World Example
Let's calculate the price of a 15-gram gold chain made of 22K gold.
- Current Market Rate (24K/10g): 60,000
- Making Charges: 10%
- GST: 3%
- 1g 24K Rate: 60,000 / 10 = 6,000
- 1g 22K Rate: 6,000 × (22/24) = 5,500
- Material Cost: 5,500 × 15g = 82,500
- Making Charges: 82,500 × 10% = 8,250
- Subtotal: 82,500 + 8,250 = 90,750
- GST (3%): 90,750 × 0.03 = 2,722.50
- Final Price: 93,472.50
Why Do Jewelers Have Different Rates?
While the market rate for gold bullion (24K) fluctuates globally based on trading, local jewellery associations often set a daily "Board Rate." However, the final price varies between shops primarily due to Making Charges. High-end brands may charge 20-30% making charges for intricate designs, while smaller jewelers might charge 8-12%. Always negotiate on the making charges, as the gold rate itself is usually fixed.