Ounces to grains conversion factor is 437.5 (for troy weight it is 480). To find out how many grains in an ounce, multiply by the conversion factor or use the converter.
1 Ounce = 437.5 Grains
Ounce is an imperial and US customary mass unit. 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".