What does the gold price actually measure?
A gold quote needs a currency, a weight unit and a timestamp. The reference above uses U.S. dollars per troy ounce. Its gram and kilogram values are conversions of that same reference, rather than separate dealer offers. Look at the source timestamp before comparing it with a price you found elsewhere.
A market reference and an official benchmark are different things. For example, the LBMA Gold Price is established in scheduled auctions. This page uses Gold API, not an official LBMA auction feed. See LBMA benchmark information ↗ for that distinction.
Gold price per gram and per ounce
One troy ounce equals 31.1034768 grams. Divide an ounce reference by that number to find the fine-gold value per gram. Multiply the gram value by 1,000 for the kilogram equivalent. Keep full precision until the final dollar amount; rounding each intermediate step can change an estimate.
Fine-gold reference per gram = USD per troy ounce ÷ 31.1034768.
What about 24K, 18K and 14K gold?
A fine-gold reference does not make every gram of jewelry worth the same amount. Karat describes a nominal fraction of gold out of 24. For a simple content estimate, 18K uses 18 ÷ 24, while 14K uses 14 ÷ 24. The calculator combines this fraction with the item weight. It does not test the item or confirm its hallmark.
For example, 10 grams at 18K represents 7.5 grams of nominal fine-gold content. If you enter a hypothetical fine-gold reference of $100 per gram, the content estimate is $750. That is an arithmetic example, not today's market quote or an offer to buy your item. Use the gold value calculator for your own inputs.
Why the dealer price can be different
A finished bullion product has a specific size, manufacturer, condition and availability. Ask for the total payable amount, including delivery and payment charges, and compare the same product with another written offer. When selling, request a separate buyback quote. A displayed market reference does not establish what a dealer will pay.
Start with the right comparison
Record the product, its fine-metal content, the quoted currency and when the offer was obtained. For jewelry, record how the weight and purity were established. For a trading product, read the instrument details instead of treating a gold price page as an order screen. Our gold and silver trading guide explains the product differences.