Gold Purity Reference

Gold Purity Comparison

How gold carats translate to purity percentage and parts per thousand.

Gold Carats Gold Percentage Purity (ppt)

9 Carat

37.5%

375 ppt

18 Carat

75%

750 ppt

22 Carat

91.6%

916 ppt

Carat
9%
ppt

Purity figures are standard industry benchmarks; actual alloy composition may vary slightly by manufacturer.