Answer by
PaulKria (47)
Troy ounce is a unit to measure gold mass. A standard gold bar weight is 400 troy ounces. This is a standard weight of gold bars, which are mostly usable in trading and held in banks reserves. One troy ounce weights about 31.10 grams. This means, that a standard gold bar weights: 400x31.10/1000=12.44 kg.