Gold Calculator

Two pieces weighing 10 grams can have different metal values because purity changes the amount of actual gold. Enter the weight, then choose 24K, 22K, 18K or 14K. The gold value calculator applies the matching purity factor before converting the result into USD, EUR or GBP.

A 24K item is treated as 99.9% pure, while 22K is 91.67%, 18K is 75% and 14K is 58.33%. The gold karat calculator uses factors of 0.999, 0.9167, 0.75 and 0.5833. If a jewelry stamp is missing or unreadable, a weight-only estimate cannot establish its purity.

From troy ounce to gram gold price

The international market quotes gold per troy ounce. One troy ounce equals exactly 31.1034768 grams, so the pure gram gold price is the ounce price divided by 31.1034768. This is a troy ounce, not the everyday avoirdupois ounce. The headline 24K gold price is then adjusted for the selected karat. Currency conversion happens after the metal value is calculated.

Three modes answer different questions

Gold to Money values grams or a coin. Mixed Coins combines sovereigns, fractional sovereigns and loose grams into one total. Money to Gold works in reverse and estimates how many grams a budget can buy. That last result may include a fraction of a coin that is not sold as a physical product.

A Sovereign weighs about 7.988 grams, a Half Sovereign 3.994 grams and a Quarter Sovereign 1.997 grams. These coin options always use their fixed 22K fineness; the karat tabs apply to grams or a custom weight. Used as a bullion value calculator, the tool shows underlying metal worth. Dealer premiums, minting costs and collectible value sit outside that figure.

Why a dealer quote can be different

This gold price calculator uses a spot-market reference. A shop or online dealer can add a bid-ask spread, fabrication cost, tax or margin; a buyback quote can also fall below spot. Compare quotes taken at the same time, because an older price is not a fair comparison with a newly loaded result.

Jewelry needs a separate reality check

Stones, clasps and non-gold parts may be included in the scale weight, while craftsmanship paid at retail is rarely recovered in full. Use the calculator as a metal baseline, then ask how the buyer tests purity and deducts non-gold weight. For scrap gold, compare the buyer's quoted percentage with the calculated metal value.

If your question is “how much is my gold worth?”, the answer here is the estimated spot metal value, not a guaranteed sale price. The same distinction applies when the page is used as a gold worth calculator for jewelry, coins or bars.