function toggleCustomPurity() {
var puritySelect = document.getElementById("goldPurity");
var customPurityGroup = document.getElementById("customPurityGroup");
if (puritySelect.value === "custom") {
customPurityGroup.style.display = "block";
} else {
customPurityGroup.style.display = "none";
}
}
function calculateGoldValue() {
var goldWeight = parseFloat(document.getElementById("goldWeight").value);
var weightUnit = document.getElementById("weightUnit").value;
var goldPrice = parseFloat(document.getElementById("goldPrice").value);
var priceUnit = document.getElementById("priceUnit").value;
var goldPurity = document.getElementById("goldPurity").value;
var customPurity = parseFloat(document.getElementById("customPurity").value);
var resultDiv = document.getElementById("result");
if (isNaN(goldWeight) || goldWeight <= 0) {
resultDiv.innerHTML = "Please enter a valid positive gold weight.";
return;
}
if (isNaN(goldPrice) || goldPrice <= 0) {
resultDiv.innerHTML = "Please enter a valid positive gold price.";
return;
}
if (goldPurity === "custom" && (isNaN(customPurity) || customPurity 100)) {
resultDiv.innerHTML = "Please enter a valid custom purity percentage (0.01-100).";
return;
}
var weightInGrams;
switch (weightUnit) {
case "grams":
weightInGrams = goldWeight;
break;
case "troyOunces":
weightInGrams = goldWeight * 31.1035;
break;
case "kilograms":
weightInGrams = goldWeight * 1000;
break;
case "tolas":
weightInGrams = goldWeight * 11.6638; // Indian/Pakistani Tola
break;
case "pounds":
weightInGrams = goldWeight * 453.592; // Avoirdupois pound
break;
default:
weightInGrams = goldWeight;
}
var purityFactor;
switch (goldPurity) {
case "24K":
purityFactor = 0.999; // 99.9% pure
break;
case "22K":
purityFactor = 0.916; // 91.6% pure
break;
case "18K":
purityFactor = 0.750; // 75.0% pure
break;
case "14K":
purityFactor = 0.583; // 58.3% pure
break;
case "custom":
purityFactor = customPurity / 100;
break;
default:
purityFactor = 1; // Default to 100% if somehow not selected
}
var pricePerGram;
switch (priceUnit) {
case "perGram":
pricePerGram = goldPrice;
break;
case "perTroyOunce":
pricePerGram = goldPrice / 31.1035;
break;
case "perKilogram":
pricePerGram = goldPrice / 1000;
break;
default:
pricePerGram = goldPrice;
}
var pureGoldContentInGrams = weightInGrams * purityFactor;
var totalValue = pureGoldContentInGrams * pricePerGram;
resultDiv.innerHTML =
"
" + pureGoldContentInGrams.toFixed(2) + " g (equivalent 24K gold)" +
"
$" + totalValue.toFixed(2) + "";
}
// Initialize custom purity display on page load
window.onload = toggleCustomPurity;
.calculator-container {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f9f9f9;
border: 1px solid #ddd;
border-radius: 8px;
padding: 25px;
max-width: 600px;
margin: 30px auto;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.calculator-container h2 {
text-align: center;
color: #333;
margin-bottom: 25px;
font-size: 1.8em;
}
.calculator-content {
display: flex;
flex-direction: column;
gap: 15px;
}
.input-group {
display: flex;
flex-direction: column;
margin-bottom: 10px;
}
.input-group label {
margin-bottom: 8px;
color: #555;
font-weight: bold;
font-size: 0.95em;
}
.input-group input[type="number"],
.input-group select {
padding: 10px 12px;
border: 1px solid #ccc;
border-radius: 5px;
font-size: 1em;
width: 100%;
box-sizing: border-box;
-webkit-appearance: none; /* Remove default browser styling for selects */
-moz-appearance: none;
appearance: none;
background-color: #fff;
}
.input-group input[type="number"]:focus,
.input-group select:focus {
border-color: #007bff;
outline: none;
box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}
.input-group select {
cursor: pointer;
}
button {
background-color: #28a745;
color: white;
padding: 12px 20px;
border: none;
border-radius: 5px;
cursor: pointer;
font-size: 1.1em;
font-weight: bold;
margin-top: 20px;
transition: background-color 0.3s ease, transform 0.2s ease;
width: 100%;
}
button:hover {
background-color: #218838;
transform: translateY(-2px);
}
button:active {
background-color: #1e7e34;
transform: translateY(0);
}
.result-container {
background-color: #e9f7ef;
border: 1px solid #d4edda;
border-radius: 8px;
padding: 20px;
margin-top: 25px;
}
.result-container h3 {
color: #28a745;
margin-top: 0;
margin-bottom: 15px;
font-size: 1.4em;
text-align: center;
}
.result-container p {
margin-bottom: 8px;
color: #333;
line-height: 1.6;
font-size: 1.05em;
}
.result-container p strong {
color: #000;
}
@media (min-width: 480px) {
.input-group {
flex-direction: row;
align-items: center;
gap: 15px;
}
.input-group label {
flex: 1;
margin-bottom: 0;
text-align: right;
}
.input-group input[type="number"],
.input-group select {
flex: 2;
}
}
Understanding Gold Price Conversion and Valuation
Gold has been a symbol of wealth and a reliable store of value for centuries. Whether you're buying, selling, or simply tracking its value, understanding how to convert gold weights and calculate its price accurately is essential. Our Gold Price Conversion Calculator simplifies this process, allowing you to quickly determine the value of your gold based on various units and purities.
Key Factors in Gold Valuation
Several factors influence the final value of gold. Our calculator takes the most critical ones into account:
1. Gold Weight Units
Gold is measured in various units around the world. The most common include:
- Grams (g): The standard metric unit, widely used globally.
- Troy Ounces (ozt): The international standard for precious metals. One troy ounce is approximately 31.1035 grams. It's important not to confuse it with the avoirdupois ounce (used for general goods), which is lighter.
- Kilograms (kg): Used for larger quantities, especially in institutional trading. One kilogram equals 1000 grams.
- Tolas: A traditional unit of mass in South Asia and the Middle East. The value of a tola can vary slightly by region, but commonly, one tola is 11.6638 grams.
- Pounds (lb): While less common for gold, the avoirdupois pound is sometimes used. One pound is approximately 453.592 grams.
Our calculator allows you to input your gold's weight in any of these units and converts it to a common base for calculation.
2. Gold Purity (Karats and Fineness)
Pure gold is 24 Karat (24K) or 99.9% pure (often referred to as 999 fine). However, gold is often alloyed with other metals (like copper, silver, or zinc) to increase its hardness, durability, or to change its color. This affects its purity and, consequently, its value.
- 24 Karat (24K): 99.9% pure gold. This is the purest form.
- 22 Karat (22K): Approximately 91.6% pure gold (22 parts gold, 2 parts other metals). Common for jewelry in many parts of the world.
- 18 Karat (18K): 75.0% pure gold (18 parts gold, 6 parts other metals). Popular for fine jewelry.
- 14 Karat (14K): 58.3% pure gold (14 parts gold, 10 parts other metals). A durable option for everyday jewelry.
The calculator adjusts the value based on the selected purity, ensuring you get an accurate valuation of the actual gold content.
3. Current Gold Price
The market price of gold fluctuates daily based on global economic conditions, supply and demand, geopolitical events, and currency strength. Gold prices are typically quoted per troy ounce, per gram, or per kilogram in a specific currency (e.g., USD, EUR, INR).
Our calculator lets you input the current price in your preferred unit (per gram, per troy ounce, or per kilogram) and then uses this to determine the total value of your gold.
How to Use the Gold Price Conversion Calculator
- Enter Gold Weight: Input the total weight of your gold in the "Gold Weight" field.
- Select Weight Unit: Choose the corresponding unit of weight (Grams, Troy Ounces, Kilograms, Tolas, or Pounds) from the dropdown menu.
- Enter Current Gold Price: Input the prevailing market price of gold.
- Select Price Unit: Choose whether the price you entered is "per Gram," "per Troy Ounce," or "per Kilogram."
- Select Gold Purity: Choose the karatage of your gold (e.g., 24K, 22K, 18K). If you know the exact percentage, select "Custom Purity (%)" and enter the percentage.
- Click "Calculate Gold Value": The calculator will instantly display the equivalent weight in grams, the pure gold content (equivalent 24K gold), and the estimated total value.
Example Calculation
Let's say you have a gold necklace weighing 15 grams, and it's 22 Karat. The current market price for gold is $65 per gram.
- Gold Weight: 15 grams
- Weight Unit: Grams
- Current Gold Price: $65
- Price Unit: per Gram
- Gold Purity: 22 Karat (91.6% pure)
The calculator would perform the following steps:
- Pure Gold Content: 15 grams * 0.916 (for 22K) = 13.74 grams of pure gold.
- Total Value: 13.74 grams * $65/gram = $893.10
The calculator would display an estimated value of $893.10 for your 22K gold necklace.
Use this tool to get quick and accurate valuations for your gold, whether for personal knowledge, investment tracking, or preparing for a transaction.