How many grams are in an ounce of gold? Gold is usually measured with the troy ounce, which is equivalent to about 31.103 grams. This standard of measurement was made in France during medieval times and was afterwards adopted because of the United States in 1828 for standard coinage. A https://edwinhqhtw.ampblogs.com/the-2-minute-rule-for-pure-gold-earrings-for-men-68061576