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Square Metres

The square metre or square meter is the SI derived unit of area with symbol m2. It is the area of a square with sides one metre in length. The White House in Washington with it's six stories is 5,100 square meters of floor space and includes 132 rooms and 35 bathrooms, 412 doors, 147 windows.

Hectares

The hectare is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), or 10,000 m2, and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about 0.405 hectare and one hectare contains about 2.47 acres. Hacienda Nápoles, the luxurious ranch built by notorious drug lord Pablo Escobar, and which included a zoo complete with animals such as antelope, elephants, exotic birds, giraffes, hippopotamuses, ostriches, and ponies, was 1,500 hectares in size.