Convert Troy Ounce to Grain (oz t to Grain)

Troy Ounce (oz t) and Grain (Grain) are both units of mass. With the conversion form below, you can effortlessly and accurately convert troy ounce to grain. This free online calculator tool makes it simple and easy to perform the conversion from oz t unit to the Grain unit.

Mass is the measure of the amount of matter in an object and its resistance to acceleration (inertia). The SI base unit is the kilogram (kg), now defined by fixing the Planck constant at h = 6.62607015 × 10⁻³⁴ J·s. Mass differs from weight: weight is the gravitational force acting on a mass (measured in newtons), while mass remains constant regardless of location. Common mass units include gram (g), milligram (mg), tonne (t = 1,000 kg), pound (lb), and ounce (oz).

Troy ounce (symbol: oz t or ozt) is a unit of mass used primarily for weighing precious metals such as gold, silver, platinum, and palladium. One troy ounce is exactly equal to 31.1034768 grams, making it heavier than the avoirdupois ounce, which is commonly used for everyday goods. The troy ounce is the international standard for pricing and trading bullion, coins, and precious metals, and it is frequently converted to grams, kilograms, and avoirdupois ounces in global commodity markets and jewelry applications.

The grain (symbol: gr) is a traditional unit of mass equal to exactly 64.79891 milligrams or approximately 0.0648 grams. Although it is no longer commonly used for everyday measurements, the grain remains an important unit for weighing bullets, gunpowder, arrows, pharmaceuticals, and precious materials. It is a non-SI unit that is still recognized in specialized industries and has historical significance in the Imperial system of units.

One grain is equal to 64.79891 milligrams, 0.06479891 grams,  0.002285714286 ounces, 0.000142857 pounds, and 0.00006479891 kilograms. The grain continues to be widely used in ballistics, ammunition, medicine, and other fields where precise small-mass measurements are required.