Gold is measured in troy ounces, often simply referred to as ounce when the reference to gold is evident. One troy ounce is equivalent to 31.1034768 grams. The much more commo
…nly used avoirdupois ounce is used for measuring weights in most situation in daily life in countries using imperial measures, an avoirdupois ounce is lighter than a troy ounce; One avoirdupois ounce = 28.349523125 grams. The standard gold bar held and traded internationally by central banks and bullion dealers is the Good Delivery bar with a 400 oz. nominal weight. However, its precise gold content is permitted to vary between 350 oz and 430 oz. The minimum purity required is 99.5% gold. These bars must be stored in recognized and secure gold bullion vaults to maintain their quality status of Good Delivery. The recorded provenance of this bar assures integrity and maximum resale value. One tonne = 1000 kilograms = 32,150.746 troy ounces. One kilogram = 1000 grams = 32.15074656 troy ounces. One tola = 11.6638038 grams. One tael = 50 grams. TT (Ten Tola) = 117 grams (3.75 oz) Tola is a traditional Indian measure for the weight of gold and prevalent to this day. Many international gold manufacturers supply tola bars of 999.96 purity. (MORE) 
