How Do You Convert Troy Weight Measurements?
Troy weight derives its name from the French city Troyes. This system of measurement is used for weighing gunpowder, arrows, arrowheads, gemstones and precious metals, such as gold or silver. Here are definitions for each troy weight unit. The steps demonstrate how to convert between troy and avoirdupois weight and how to convert to metric mass units. Divide the number of grains by 24 to get the number of pennyweights (abbreviated dwt). Convert pennyweights to ounces troy by dividing by 20. There are 480 grains in an ounce troy. Change ounces troy to pounds troy by dividing by 12. There are 240 pennyweights in a pound troy, and 5,760 grains in a pound troy. Abbreviate pound troy as “lb t” and ounce troy as “oz t” to distinguish them from the more common avoirdupois pound and ounce. Multiply ounces avoirdupois by 0.911 to get the equivalent number of ounces troy. To convert ounces troy to ounces avoirdupois, multiply by the reciprocal of 0.911, which is 1.098. Convert pounds avoirdupois
