What is a troy ounce of gold?
Robert Spencer
Updated on April 11, 2026
One troy ounce is 31.1034768 grams, or 0.0311034768 kilograms. The troy ounce is used in the weighing and pricing of the precious metals : gold, platinum, palladium and silver. A troy ounce is equivalent to 480 grains. A grain is 0.06479891 grams.