1 hectare = 100 acres 1 hectare = 15 acres To learn weights and measures units and their conversions, you can refer to the smart phone utility software: Smart Weights and Measures Unit Converter. Searched by name. It includes area/length/volume/weight units, with 95 types; including metric system, British and American system, municipal system, and Taiwan system. Any two units of the same type can be converted between each other. There are also nicknames, symbols/abbreviations, and English names for each unit.