Troy Weight

Gold and silver are measured in Troy weight, a system that includes pennyweights, ounces and pounds. The ounces and pounds do not equal the Avordupois or customary U.S. system that other common goods are measured in. Gold is also commonly measured in metric grams. A pennyweight (abbreviated dwt.) is equal to 1.5552 grams. 24 grains = 1 pennyweight = 1.5552 grams 20 pennyweight = 1 troy ounce = 31.1035 grams 12 ounces = 1 pound troy = 373.24 grams.For complete information on weighing gold, silver and gemstones see Weights and Measures of Gold, Silver and Gemstones.