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Gold Price Calculator
Gram (g)
Troy Ounce (ozt)
Avoirdupois Ounce (oz)
24 Karat (99.9% – Pure Gold)
22 Karat (91.67%)
18 Karat (75%)
14 Karat (58.33%)
10 Karat (41.67%)
Enter values and click "Calculate Gold Value"
function calculateGoldPrice() {
var goldWeight = parseFloat(document.getElementById('goldWeight').value);
var weightUnit = document.getElementById('weightUnit').value;
var goldPurityKarat = parseFloat(document.getElementById('goldPurity').value);
var marketPricePerGram = parseFloat(document.getElementById('marketPricePerGram').value);
var resultDiv = document.getElementById('goldPriceResult');
if (isNaN(goldWeight) || goldWeight <= 0) {
resultDiv.innerHTML = 'Please enter a valid positive number for Gold Weight.
';
return;
}
if (isNaN(marketPricePerGram) || marketPricePerGram <= 0) {
resultDiv.innerHTML = 'Please enter a valid positive number for Market Price per Gram.
';
return;
}
var weightInGrams;
switch (weightUnit) {
case 'gram':
weightInGrams = goldWeight;
break;
case 'troyOunce':
weightInGrams = goldWeight * 31.1035; // 1 troy ounce = 31.1035 grams
break;
case 'ounce':
weightInGrams = goldWeight * 28.3495; // 1 avoirdupois ounce = 28.3495 grams
break;
default:
weightInGrams = goldWeight; // Should not happen with dropdown
}
var purityDecimal;
switch (goldPurityKarat) {
case 24:
purityDecimal = 1.0;
break;
case 22:
purityDecimal = 0.9167;
break;
case 18:
purityDecimal = 0.75;
break;
case 14:
purityDecimal = 0.5833;
break;
case 10:
purityDecimal = 0.4167;
break;
default:
purityDecimal = 1.0; // Default to 24K if something goes wrong
}
var fineGoldContentGrams = weightInGrams * purityDecimal;
var totalGoldValue = fineGoldContentGrams * marketPricePerGram;
resultDiv.innerHTML = 'The estimated value of your gold is: $' + totalGoldValue.toFixed(2) + ' USD';
}
Understanding Gold Value
Gold has been a symbol of wealth and a store of value for millennia. Its price is influenced by a complex interplay of global economic factors, geopolitical events, supply and demand, and currency fluctuations. Understanding how to calculate the value of your gold is essential, whether you're buying, selling, or simply assessing your assets.
Key Factors in Gold Valuation:
- Weight: The most straightforward factor. Gold is typically measured in grams, troy ounces (ozt), or sometimes avoirdupois ounces (oz). A troy ounce is slightly heavier than a standard avoirdupois ounce, and it's the standard unit for precious metals.
- Purity (Karat): Gold's purity is measured in karats (K). Pure gold is 24K, meaning it's 99.9% gold. Lower karat numbers indicate a lower percentage of gold, with the remainder being other metals (like copper, silver, or zinc) added for durability or color.
- 24K: 99.9% pure gold. Soft and typically used for bullion or investment.
- 22K: 91.67% gold, 8.33% other metals. Common in jewelry, especially in Asian markets.
- 18K: 75% gold, 25% other metals. A popular choice for jewelry, offering a good balance of purity and durability.
- 14K: 58.33% gold, 41.67% other metals. More durable and less expensive than higher karats, widely used in Western jewelry.
- 10K: 41.67% gold, 58.33% other metals. The lowest karatage that can be legally sold as gold in many countries, offering maximum durability.
- Market Price: This is the current trading price of pure gold on international markets, usually quoted per troy ounce or per gram in a specific currency (e.g., USD). This price fluctuates constantly throughout the day.
How the Gold Price Calculator Works:
Our calculator simplifies the process by taking these three critical factors into account:
- Input Gold Weight: Enter the weight of your gold item.
- Select Weight Unit: Choose whether your weight is in grams, troy ounces, or avoirdupois ounces. The calculator will internally convert this to grams for consistency.
- Choose Gold Purity: Select the karat of your gold. This determines the percentage of pure gold content in your item.
- Enter Market Price: Input the current market price of pure gold per gram. You can find this on financial news websites or precious metal dealer sites.
The calculator then determines the "fine gold" content (the actual amount of pure gold) in your item and multiplies it by the current market price per gram to give you an estimated total value.
Example Calculation:
Let's say you have a 15-gram, 18K gold ring, and the current market price of pure gold is $68.00 per gram.
- Weight: 15 grams
- Unit: Grams (no conversion needed)
- Purity: 18K gold is 75% pure (0.75).
- Market Price: $68.00 per gram.
Calculation:
Fine Gold Content = 15 grams * 0.75 = 11.25 grams
Total Value = 11.25 grams * $68.00/gram = $765.00
This calculator provides a quick and accurate estimate, helping you make informed decisions about your gold assets.