function calculateGoldRate() {
// Get input values
var rate24kInput = document.getElementById('rate24k').value;
var weightInput = document.getElementById('weightGrams').value;
var makingInput = document.getElementById('makingCharges').value;
var taxInput = document.getElementById('taxRate').value;
// Convert to floats
var rate24k = parseFloat(rate24kInput);
var weight = parseFloat(weightInput);
var makingPercent = parseFloat(makingInput);
var taxPercent = parseFloat(taxInput);
// Validation
if (isNaN(rate24k) || rate24k <= 0) {
alert("Please enter a valid current 24K gold rate.");
return;
}
if (isNaN(weight) || weight <= 0) {
alert("Please enter a valid weight in grams.");
return;
}
if (isNaN(makingPercent)) makingPercent = 0;
if (isNaN(taxPercent)) taxPercent = 0;
// Logic: 22K is 91.66% pure (22/24)
var purityFactor = 22 / 24;
// Calculate 22K rate per gram
var rate22k = rate24k * purityFactor;
// Calculate Base Value (Rate * Weight)
var baseValue = rate22k * weight;
// Calculate Making Charges (on base value usually, sometimes on rate. Assuming on base value of gold)
var makingCost = baseValue * (makingPercent / 100);
// Subtotal before Tax
var subTotal = baseValue + makingCost;
// Calculate Tax (on subtotal including making charges)
var taxCost = subTotal * (taxPercent / 100);
// Final Total
var grandTotal = subTotal + taxCost;
// Display Results
document.getElementById('displayRate22k').innerText = rate22k.toFixed(2);
document.getElementById('displayBaseValue').innerText = baseValue.toFixed(2);
document.getElementById('displayMakingCharges').innerText = makingCost.toFixed(2);
document.getElementById('displayTax').innerText = taxCost.toFixed(2);
document.getElementById('displayTotal').innerText = grandTotal.toFixed(2);
// Show result section
document.getElementById('results').style.display = 'block';
}
How to Calculate 22 Carat Gold Rate from 24 Carat
Understanding the difference between 24 Carat (24K) and 22 Carat (22K) gold is essential for anyone looking to invest in bullion or purchase jewelry. While the market usually quotes the price of pure gold (24K), jewelry is almost exclusively made from 22K gold due to its durability. This calculator helps you determine the exact value of 22K gold based on the fluctuating 24K market rates.
The Difference Between 24K and 22K Gold
The "K" in gold stands for Karat, which is the unit used to measure the purity of gold. The scale ranges from 1 to 24.
24 Carat Gold (24K): This is 99.9% pure gold. It is naturally yellow and highly malleable. Because it is so soft, it is generally not used for intricate jewelry as it would easily bend or scratch. It is primarily used for investment bars and coins.
22 Carat Gold (22K): This alloy consists of 22 parts pure gold and 2 parts other metals (usually copper, silver, zinc, or nickel). In percentage terms, it is 91.67% gold. The added metals provide the hardness required for jewelry making. This is often referred to as "916 Gold".
Mathematical Formula for Conversion
To convert the price of 24K gold to 22K gold manually, you need to apply the purity percentage. Since 22K gold contains 22 parts gold out of 24, the math is straightforward:
22K Rate = Current 24K Rate × (22 / 24)
Alternatively:
22K Rate = Current 24K Rate × 0.9167
Example Calculation
If the current market rate for 24K gold is 6,000 per gram:
Divide 6,000 by 24 = 250 (Price per single karat).
Multiply 250 by 22 = 5,500.
So, the base rate for 22K gold would be 5,500 per gram.
Understanding Final Price Components
When you buy jewelry, the calculated 22K rate is just the starting point (the metal value). The final invoice usually includes two additional components that significantly affect the price:
1. Making Charges
Making charges are the fees paid to the jeweler for the labor involved in designing and creating the piece. This can be a fixed amount per gram or a percentage of the gold value. Intricate designs attract higher making charges, often ranging from 8% to 25% of the gold value.
2. Taxes (GST/VAT)
Depending on your region, taxes are applied to the total value of the gold plus the making charges. For example, in many regions, a specific GST rate is applied to the final subtotal, increasing the final acquisition cost.
Why Use This Calculator?
Jewelers often display the 22K rate on their boards, but it is crucial to verify if that rate aligns with the current 24K market trends. By using the 24K base rate, you can transparently calculate what the 22K rate should be and ensure you are being charged fairly for the metal, separating the material cost from the craftsmanship fees.