Ounces to grains conversion table shows the most common values for the quick reference. Alternatively, you may use the converter below to convert any other values.
1 Ounce = 437.5 Grains
1 Troy Ounce = 480 Grains
Ounce is an imperial and us customary mass unit. The commonly used ounces are the international avoirdupois and the troy ounce. Troy ounce is used for the measurement of precious metals, gold, silver etc. The abbreviation is "oz".
Grain is a unit of mass and based on the average mass of a seed of a cereal, barley and wheat. 1 pound equals to 7000 grains. It is also commonly used to measure the hardness of water and the mass of gunpowder. The abbreviation is "gr".
For other units of weight conversion, please go to Weight Conversion