18K Gold Calculator
Find out what your 18K gold is worth using live market prices. 18K is the premium choice for fine jewelry and watches — enter your item's weight for an instant value in USD.
How the 18K Gold Calculator Works
18K gold contains 75% pure gold (marked 18K or 750), with 25% alloy for strength. Its rich color and high gold content make it the standard for fine jewelry, engagement rings, and luxury watches.
This calculator multiplies your item's weight by 0.75 (the 18K purity factor) and the live gold spot price to estimate its melt value, updating every minute with real market data.
The figure shown is the pure-gold (melt) value. Because 18K is often used in designer and branded pieces, some items are worth more sold intact than melted — get a second opinion on high-end jewelry before scrapping it.
Example: Valuing an 18K Gold Bracelet
Frequently Asked Questions
18K means 18 of 24 parts are pure gold — 75% gold, usually stamped '18K' or '750'. It has a richer color than 14K and a higher gold value per gram.
It's the live gold price per gram multiplied by 0.75. Prices change constantly, so use the calculator above for the current per-gram figure.
18K has more gold (75% vs 58.3%) and a deeper color, so it's worth more per gram, but it's softer. 14K is more durable for everyday wear. 'Better' depends on your priorities.
The number shown is melt value. Offers are usually 60–85% of it, though a well-kept designer 18K piece may fetch more sold intact than melted.
Look for an '18K' or '750' hallmark. If unmarked, a jeweler can test purity with acid or XRF. 'GF'/'GP' marks indicate gold-filled or plated, not solid 18K.
Have gold in other karats or metals? Use our full calculator for all purities, weight units, and currencies.
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