Convert gold Karats (K) to purity percentage and fineness (parts per thousand).
When buying jewelry or bullion, gold is usually measured in Karats (denoted by "K" or "kt"). Pure gold is 24 Karats, but because pure gold is extremely soft, it is often alloyed with other metals like copper or silver to increase its durability.
Our Gold Karat Purity Calculator translates the Karat number into an exact percentage of pure gold, as well as its Millesimal Fineness (the number of parts of gold per thousand). Simply enter a Karat value like 14K, 18K, or 22K to see exactly how much actual gold your jewelry contains.