A gold value calculator lets you determine the current market value of gold jewelry, coins, or bullion based on weight, purity (karat), and the live spot price. Jewelers, pawn shops, investors, and sellers use this tool to price gold accurately.
How to Use This Calculator
- Enter the weight of the gold item in grams, troy ounces, or pennyweights (dwt).
- Select the karat (24K = pure gold, 18K = 75%, 14K = 58.3%, 10K = 41.7%).
- Enter the current gold spot price per troy ounce (or use the live price if available).
- Click Calculate to see the pure gold content and current melt value.
What This Calculator Measures
- Pure gold weight — The actual amount of gold after adjusting for karat purity.
- Melt value — What the gold is worth purely based on its metal content at spot price.
- Karat purity — The proportion of gold in the alloy (24K = 99.9%, 18K = 75%, 14K = 58.3%).
- Dealer spread — Buyers typically pay 70–90% of melt value for scrap; coins trade at or near spot.
Formula or Logic
Pure Gold Weight (troy oz) = (Item Weight in Grams ÷ 31.1035) × (Karat ÷ 24)
Melt Value = Pure Gold Weight (troy oz) × Spot Price Per Troy Ounce
Troy ounce conversion: 1 troy oz = 31.1035 grams; 1 pennyweight = 1.55517 grams.
Example Calculations
Example 1: 18K gold ring weighing 5 grams. Spot price = $2,000/troy oz. Pure gold = (5 ÷ 31.1035) × 0.75 = 0.1206 troy oz. Melt value = $241.
Example 2: 14K gold necklace, 15 grams. Pure gold = (15 ÷ 31.1035) × 0.583 = 0.2812 troy oz. At $2,200/oz → Melt value = $618.64.
Understanding Your Results
Melt value is the floor price for scrap gold. Jewelry in good condition sells for more due to craftsmanship. Rare coins (numismatic value) can be worth many multiples of melt value. Always get multiple quotes from reputable dealers.
Common Mistakes to Avoid
- Using the pennyweight scale when the dealer uses grams — confirm units before weighing.
- Not verifying karat purity with a hallmark or acid test before calculating.
- Accepting the first dealer offer — compare at least 3 buyers since margins vary significantly.
- Confusing gold-plated or gold-filled items (very little actual gold) with solid gold items.