Gold jewelry · 750 · nominal purity
18K Gold Price Per Gram Today
18K gold has a current nominal melt reference of USD 100.04 per gram. Its common mark is 750; tables use a disclosed nominal karat factor of 0.75, not a laboratory assay.
Gold · USD · 1 g · spot value
$100.04
+0.15% over 24h
Last quote
18K gold value calculator
10 g × 0.75 purity × USD 133.38 per gram of pure gold. Buyer payout is your assumption, not a promised offer.
18K gold price per gram, ounce and kilogram
| Unit | USD | EUR | GBP | JPY | CHF |
|---|---|---|---|---|---|
| Troy Ounce (oz) | 3,111.47 | 2,775.20 | 2,344.25 | — | — |
| Gram (g) | 100.04 | 89.22 | 75.37 | — | — |
| Kilogram (kg) | 100,036.16 | 89,224.59 | 75,369.23 | — | — |
| Tola (tola) | 1,166.80 | 1,040.70 | 879.09 | — | — |
| Tael (Hong Kong) (tael) | 3,744.25 | 3,339.59 | 2,820.99 | — | — |
| Baht (Thailand) (baht) | 1,524.95 | 1,360.14 | 1,148.93 | — | — |
What is 18K gold?
18K gold is 75% gold and 25% alloy metals. It is the premium grade for fine jewellery and watches in Europe, and is used for white, yellow and rose gold depending on the alloy mix.
18K balances a rich colour with good wear resistance, which makes it the choice for engagement rings, luxury watches and designer jewellery. Italian and French jewellery is commonly 18K.
How the 18K gold price is calculated
Gold is traded internationally as pure 24K metal per troy ounce. To find the 18K price, multiply the spot price by the 18K purity factor of 0.75 and divide by 31.1035 to convert ounces to grams. Today that gives USD 100.04 per gram of 18K gold, compared with USD 133.38 for pure 24K.
Example: a 18K chain weighing 15 g contains 11.25 g of pure gold, so its melt value is USD 1,500.54 (EUR 1,338.37). A 5 g ring is worth about USD 500.18, and 100 g of 18K scrap about USD 10,003.62 before the buyer's margin.
How to recognise 18K gold
Stamps include 750, 18K, 18ct and 18KT. White gold pieces are usually rhodium-plated, so the colour does not reveal the karat — always check the stamp.
When selling 18K jewellery from brands, check whether the brand or design has resale value above melt. For unbranded or broken pieces, the per-gram melt value here is a fair starting point for negotiating. Live quotes are cached for five minutes; open pages request updates about every minute. Check the quote timestamp; see our methodology for details.
Compare a 18K buyer quote with the metal value
Weigh only the gold-bearing alloy. Stones, steel springs and watch movements do not contribute the same gold fraction. A tested fineness may differ from the nominal karat fraction or the common hallmark, especially for repaired or mixed constructions. Request accepted grams, tested grade and all deductions in writing. Divide a net cash offer by the matching melt reference to compare its percentage; a high advertised rate is not helpful when another fee is deducted afterward.
Do not assume every 18K piece is best sold for scrap. A maker, design, gemstone or collector market can create resale value beyond the gold. Preserve that possibility before destructive testing. A pawn loan has separate borrowing charges and redemption terms; its advance is not a cash-sale appraisal. Local tax rules depend on the transaction and product. Use the 18K scrap calculator for a net-weight scenario and the purity guide to distinguish stamped fineness from nominal math.
Gold price per gram by karat
Frequently Asked Questions
What is the 18K gold price per gram today?+
Based on the live spot price, 18K gold is worth about USD 100.04 per gram today, or USD 3,111.47 per troy ounce.
How much pure gold is in 18K?+
18K gold is 75.0% pure gold by mass (750/1000 fineness). The remainder is alloy metals added for hardness.
How is the 18K price calculated?+
We take the live 24K spot price per troy ounce and multiply by the 18K purity factor (0.7500). Convert ounces to grams by dividing by 31.1035.
What hallmark does 18K gold have?+
18K gold is commonly stamped 750 or 18K. Marks such as GP, GF or HGE mean the item is only plated or filled.
How much will a buyer pay for 18K scrap gold?+
An illustrative 70–90% payout assumption, not an observed or promised offer, gives for 10 g of 18K that would be roughly USD 700.25–900.33 today.
Is 18K gold a good choice for jewelry?+
18K balances purity with durability, making it a common choice for rings, chains and bracelets that need to withstand daily wear.