93a60a57-a3c8-18da-a746-0800200c9a66 Units of area Flächeneinheiten Technical unit groups Reference Unit Group Data Set of the International Reference Life Cycle Data System (ILCD). 0 2014-07-24T14:02:24.997+02:00 ILCD format 1.1 03.00.000 Units of area http://lca.jrc.ec.europa.eu/lcainfohub/datasets/ilcd/unitgroups/93a60a57-a3c8-18da-a746-0800200c9a66.xml m2 1.0 Square metre km2 1000000.0 Square kilometre ha 10000.0 Hectare ft2 0.09290304 British square foot mi2 2589988.11 Square mile (international) ac 4046.856 Acre (US survey) yd2 0.83612736 Square yard (imperial/US) a 100.0 Are cm2 1.0E-4 Square centimetre nmi2 3429904.0 Square nautical mile