How many grams are within an ounce of gold? Gold is usually measured from the troy ounce, which is equivalent to about 31.103 grams. This standard of measurement was created in France during medieval times and was later adopted because of the United States in 1828 for standard coinage. A https://trevorqgtem.tinyblogging.com/considerations-to-know-about-elle-pure-gold-dk-yarn-75002155