REFERENCE
Gold Purity Calculator
Understand common karat grades and approximate gold content.
KaratFinenessApprox. gold
24K99999.9%
22K916–91791.6–91.7%
21K87587.5%
18K75075.0%
14K58558.5%
10K41741.7%
Standards and marking conventions can vary by jurisdiction. Check the hallmark and applicable local standards for a specific item.