fallback snapshot Aug 2, 2026 · current Gold API reference loads automatically
Sources and review: Reviewed by MeltOffer on . Reference price: Gold API XAU/USD. Unit factors: NIST precious-metals conversions. Karat terminology: FTC Jewelry Guides, 16 CFR § 23.3.
Compare up to three written buyer offers.
How to compare buyer quotes and published payout benchmarks.
18K gold value by weight
These server-rendered fallback values update with the same live or editable spot price and selected fineness as the calculator.
| Gross weight | Melt value |
|---|---|
| 1 gram | $97.51 |
| 5 grams | $487.53 |
| 10 grams | $975.06 |
| 25 grams | $2,437.65 |
| 31.1035 grams (1 ozt gross) | $3,032.77 |
| 50 grams | $4,875.30 |
What 18K gold is worth
18K gold is approximately 75.00% pure. Its melt value is weight in grams × 18/24 ÷ 31.1035 × the live gold price per troy ounce. The calculator applies that formula before showing buyer discounts.
Where 18K gold appears
18K is three-quarters gold and appears frequently in fine jewelry and European pieces. It carries more contained gold per gram than 10K or 14K but can still include stones and non-gold findings.
White, rose, and yellow 750 gold use the same melt factor
A reliable 750 fineness means 75% gold whether the remaining alloy produces a white, rose, or yellow color. Color can affect desirability, but it does not change contained-gold melt value when fineness and net metal weight are equal.
Check resale value before treating 18K as scrap
Signed jewelry, intact watches, and wearable pieces can be worth more than their contained gold. First identify the maker and model, then compare a resale quote with the melt benchmark. For scrap math, exclude stones, movements, steel parts, and other non-gold weight.
Melt value is the negotiating yardstick
Jewelry buyers pay below melt to cover testing, refining, shipping, and margin. Compare every dollar quote with the melt value and get at least three offers before selling.
Frequently asked questions
How much is 18K gold worth per gram?
The live melt value per gram is gold spot ÷ 31.1035 × 18/24. The calculator updates that amount when the live feed loads.
What percentage of pure gold is 18K?
18K gold is approximately 75.00% pure gold; the balance is alloy metal.
What marks identify 18K gold?
Common marks include 18K, 18KT, or 750. A mark is a starting point rather than proof, so uncertain or valuable pieces should be tested without damaging them.
Will a buyer pay the full melt value?
A buyer usually will not pay the full melt value. Scrap-jewelry buyers deduct their costs and margin, so compare offers as a percentage of melt.
Does 750 mean 18K gold?
Yes. A 750 fineness claim means 750 parts gold per 1,000, equivalent to 18 parts out of 24.
Is 18K white gold worth less than yellow gold at melt?
Not when both are reliably 750 fineness and have the same net gold-alloy weight. Their contained-gold value is equal; resale value can differ.
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