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A pennyweight (dwt) is a unit of mass equal to 24 grains, 1 ⁄ 20 of a troy ounce, 1 ⁄ 240 of a troy pound, 48 ⁄ 875 avoirdupois ounce [1] and exactly 1.55517384 grams. [2] It is abbreviated dwt , d standing for denarius – (an ancient Roman coin), and later used as the symbol of an old British penny (see £sd ).
The pennyweight symbol is dwt. One pennyweight weighs 24 grains, and 20 pennyweights make one troy ounce. [15] Because there were 12 troy ounces in the old troy pound, there would have been 240 pennyweights to the pound (mass) – just as there were 240 pennies in the original pound-sterling.
default conversion combinations SI: kilogram: kg kg 1.0 ... troy ounce: ozt ozt 1.0 ozt (1.1 oz; 31 g) pennyweight: dwt
This article originally appeared on USA TODAY: How many ounces in a cup? A full liquid conversion guide. Related articles. AOL. The All-Clad Factory Seconds Sale just started: Get up to 73% off ...
Pennyweight (dwt) 32 gr T = 22 + 1 ⁄ 2 gr t ≈ 1.46 g Tower ounce 20 dwt T = 640 gr T = 18 + 3 ⁄ 4 dwt t = 450 gr t ≈ 29.2 g Tower pound 12 oz T = 240 dwt T = 7680 gr T = 225 dwt t = 5400 gr t ≈ 350 g Mark 8 oz T ≈ 233 g
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See Weight for detail of mass/weight distinction and conversion. Avoirdupois is a system of mass based on a pound of 16 ounces, while Troy weight is the system of mass where 12 troy ounces equals one troy pound. The symbol g 0 is used to denote standard gravity in order to avoid confusion with the (upright) g symbol for gram.
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