Gold has been a symbol of wealth and a store of value for millennia. Whether you're looking to sell old jewelry, appraise an inheritance, or simply understand the worth of your gold assets, knowing how to calculate its value is crucial. This Gold Value Calculator helps you quickly estimate the market value of your gold items.
Key Factors in Gold Valuation:
Gold Weight: This is the total weight of your gold item. It's typically measured in grams, troy ounces, or pennyweights. Our calculator uses grams for consistency.
Gold Purity (Karats): Gold is rarely 100% pure, especially in jewelry, as pure gold is very soft. Purity is measured in karats (K), with 24K being 99.9% pure gold. Common purities include 22K, 18K, 14K, and 10K. The higher the karat number, the higher the gold content and thus the higher its value.
Current Market Price of Gold: The price of gold fluctuates daily based on global economic conditions, supply and demand, and geopolitical events. This price is usually quoted per troy ounce or per gram. For accurate calculations, it's important to use a recent market price.
How to Use the Calculator:
Enter Gold Weight: Input the total weight of your gold item in grams. If you have the weight in a different unit, you'll need to convert it to grams first (e.g., 1 troy ounce ≈ 31.1035 grams).
Select Gold Purity: Choose the karat value that matches your gold item. This is often stamped on jewelry (e.g., "18K", "750" for 18K).
Enter Current Gold Price per Gram: Find the current market price of gold per gram. You can usually find this on financial news websites or precious metal dealer sites.
Click "Calculate Gold Value": The calculator will then display the estimated market value of your gold.
Example Calculation:
Let's say you have a gold chain weighing 25 grams, stamped as 18K, and the current market price of gold is $72 per gram.
Purity Conversion: 18K gold is 18/24 = 0.75 or 75% pure.
Effective Gold Weight: 25 grams * 0.75 = 18.75 grams of pure gold.
Total Value: 18.75 grams * $72/gram = $1350.00
This calculator provides a quick estimate. Actual selling prices may vary based on dealer margins, refining costs, and other market factors.
function calculateGoldValue() {
var goldWeight = parseFloat(document.getElementById("goldWeight").value);
var goldPurityKarat = parseFloat(document.getElementById("goldPurityKarat").value);
var currentGoldPricePerGram = parseFloat(document.getElementById("currentGoldPricePerGram").value);
var resultDiv = document.getElementById("goldValueResult");
if (isNaN(goldWeight) || goldWeight <= 0) {
resultDiv.innerHTML = "Please enter a valid gold weight (e.g., 10).";
return;
}
if (isNaN(goldPurityKarat) || goldPurityKarat 24) {
resultDiv.innerHTML = "Please select a valid gold purity in karats (1-24).";
return;
}
if (isNaN(currentGoldPricePerGram) || currentGoldPricePerGram <= 0) {
resultDiv.innerHTML = "Please enter a valid current gold price per gram (e.g., 70).";
return;
}
var purityDecimal = goldPurityKarat / 24;
var effectiveGoldWeight = goldWeight * purityDecimal;
var totalGoldValue = effectiveGoldWeight * currentGoldPricePerGram;
resultDiv.innerHTML = "