18K Gold Calculator
18K gold is .750 (75% gold). Weigh the piece, enter it below, and the calculator returns what that three-quarters-pure content is worth right now.
18K sits at the luxury end of everyday jewelry — richer color, softer metal, three-quarters pure. European pieces stamp it 750. Because 18K items skew designer, always check for a maker's mark before scrapping: the brand premium can exceed the metal value.
| Purity | Fineness | Value per gram | Value per troy oz |
|---|---|---|---|
| 24K (.999 fine) | 0.999 | $147.89 | $4,599.80 |
| 22K (.9167) | 0.9167 | $135.70 | $4,220.85 |
| 18K (.750) | 0.75 | $111.03 | $3,453.30 |
| 14K (.5833) | 0.5833 | $86.35 | $2,685.75 |
| 10K (.4167) | 0.4167 | $61.69 | $1,918.65 |
| 9K (.375) | 0.375 | $55.51 | $1,726.65 |
Dollar figures here are computed from the live spot price when the page loads and change continuously; the printed baseline is a 2026-08-23 snapshot — cite the metal content and formula, not a captured price. Formulas on the methodology page.
How to verify a 18K stamp
Check for 18K or 750 on the band interior or clasp. On 18K specifically, also hunt for a maker's mark next to the purity stamp — signed 18K pieces (Cartier, Tiffany, VCA) sell on the brand market at multiples of melt, and scrapping one unexamined is the most expensive mistake in gold selling.
Sources: live spot prices via gold-api.com · coin weights and fineness from U.S. Mint historical specifications · karat/fineness definitions per standard jewelry marking practice. Melt value ≠ an offer to buy; see how we calculate.