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Troy Weight

The name Troy weight is derived from Troyes, France where the system was first impemented. This is a unit of measurement used to weigh precious metals.

Grain

The grain measurement, the earliest unit of weight measurement, used a grain of wheat or barleycorn as its standard. It is the smallest unit of measure in the Troy system.

One grain also equals 64.798 of a milligram; 15.432 grains equals a gram.

It is also a unit used to measure pearls and equals 1/4 of a carat.

Grain also refers to cleavage direction in a diamond and patterns of color in an opal.

  • Abbreviation: gn
  • 24 gn to 1 dwt
Pennyweight

Pennyweight is a unit of Troy Weight for weighing precious metals.

  • Abbreviation: dwt
  • 20 dwts to 1 Troy Ounce
Troy Ounce

Troy ounce is a unit of Troy Weight for weighing precious metals.

  • Abbreviation: ozt
  • 12 oz to 1 Troy Pound
Troy Pound

Troy ounce is a unit of Troy Weight for weighing precious metals.​

  • Abbreviation: lb. t.
  • 1 lb. t. = 5,760 gn
  • 1 lb. t. = 240 dwt
  • 1 lb. t. = 12 ozt