Gold purity

18K Gold Price

Pure 24k gold is valued from the live spot price of $4,081.81 per troy ounce. Lower karats multiply that value by purity.

Karat	Purity	Per Gram	Per Troy Ounce
10K	41.67%	$54.68	$1,700.75
14K	58.33%	$76.55	$2,381.06
18K	75.00%	$98.42	$3,061.36
22K	91.67%	$120.30	$3,741.66
24K	100.00%	$131.23	$4,081.81

18K gold contains 75.00% gold by weight, so its melt value is $98.42 per gram before buyer discounts or refining costs.