How much is one "Hong Kong Catty" versus "China Catty"? Does one "China Catty" really equal to 10 "Hong Kong Tael"? What is the weight of one tael(HK) of Gold? Is it expensive for a flat priced at HK$10,000 per square foot? The conversion between units causes a lot of trouble. To ease your conversion, this App collects 6 types of frequently used unit: weight, distance, area, volumn, unit price of a property, computer storage.