Troy ounces to Grams Converter

About this calculator

The troy ounce is the standard unit for weighing precious metals — gold, silver, platinum, palladium — and equals exactly 31.1034768 grams, noticeably heavier than the everyday avoirdupois ounce (28.3495 g) used for food and general goods. The name traces back to the medieval trade fairs of Troyes, France, and the troy system's 12-ounce pound is why gold prices are quoted "per troy ounce," not the 16-ounce pound used elsewhere.

Bullion dealers, jewelers, mints, and commodities traders rely on the troy-to-gram conversion daily, since international gold and silver spot prices are set in US dollars per troy ounce while most of the rest of the world weighs and prices metal in grams or kilograms.