Gold and most precious metals prices are quoted in troy ounces; however, countries that have adopted the metric system price gold in grams, kilograms and tonnes.
Grams = 0.032151 troy ounces
Kg = 32.150747 troy ounces
Tonnes = 32,150,7466 troy ounces
Tael = 1.203370 troy ounces
Tola = 0.374878 troy ounce
Though not as popular as kilograms and grams, Tael is a weight measurement in China. The tola is a weight measurement in South Asia.