Gold Calculator by Weight
Professional tool to calculate gold value by weight and purity
How to use the Weight Calculator?
Step-by-step guide to calculate the real value of your gold by weight and purity
This calculator is designed for gold industry professionals: jewelers, pawn shops, precious metals dealers and investors who need to value gold based solely on its metallic content.
11. Weigh your gold precisely
Use an accurate digital scale (minimum 0.1g precision). Weigh only the gold, without chains, settings or gemstones.
💡 Tip: For jewelry, subtract the estimated weight of stones and non-precious metals.
22. Identify the karats (purity)
Look for purity marks on the piece: 10K, 14K, 18K, 22K or 24K. If there's no mark, use an acid kit or electronic tester.
Purity Guide:
- 10K = 41.7% pure gold (basic jewelry)
- 14K = 58.3% pure gold (standard jewelry)
- 18K = 75.0% pure gold (premium jewelry)
- 22K = 91.7% pure gold (investment coins)
- 24K = 99.9% pure gold (bars, bullion coins)
33. Define your commercial margins
Margins represent your profit (selling) or the discount you offer (buying). Adjust according to your business model.
Typical market margins:
- Buying: 5-15% below spot value (what you pay)
- Selling: 3-10% above spot value (what you charge)
- Pawn shops: 20-40% below spot
- Jewelry stores: 50-100% above spot (includes design/labor)
💰 Understanding the Results
What each calculated price means
Pure Value (Spot)
The intrinsic value of the gold contained in your piece, based on the current international price per troy ounce.
Buy Price
What you should pay when acquiring this amount of gold (spot minus your buying margin).
Sell Price
What you should charge when selling this amount of gold (spot plus your selling margin).
🎯 Professional Tips
✓ Always verify purity with reliable methods before making important transactions
✓ Gold prices fluctuate constantly. Update regularly to maintain competitiveness
✓ Consider additional costs: refining, transport, insurance in your final margins
✓ For antique jewelry, historical/artistic value may exceed metal value
⚠️ This tool calculates only the metallic content value. It does not include numismatic, historical, artistic or design value.
Gold Calculator by Weight and Karat
Pure Gold Value (Spot)
$0.00
Based on a price of {0.00}/oz
Buy Price
$0.00
Sell Price
$0.00
Calculations are estimates based on spot price and do not constitute a formal offer.
Who is this calculator for?
💎 For Jewelers
Value gold jewelry by its metallic content, regardless of design. Perfect for used gold purchases or inventory valuation.
🏦 For Pawn Shops
Quickly calculate loan value based on actual gold content. Adjust margins according to your commercial policy.
⚖️ For Dealers
Essential tool for buying and selling gold by weight. Calculate buy and sell margins based on current spot price.
👤 For Individuals
Do you have gold jewelry and want to know its real value? Calculate how much your gold is worth before selling or pawning.
💡 What's the difference with the coin calculator?
The coin calculator is designed for specific coins and bars with predetermined weight and purity. This weight calculator is ideal when you have generic gold: jewelry, broken chains, gold teeth, scrap gold, or any unidentified gold piece.
View Coin CalculatorKarat and Purity Guide
99.9% pure gold
Bars, investment coins
91.7% pure gold
Investment coins (Krugerrand)
75.0% pure gold
Premium jewelry
58.3% pure gold
Standard jewelry (most common)
41.7% pure gold
Basic jewelry