An acre is a unit of measurement of land area primarily used in the Indian real estate.It is used to measure land tracts such as farms, resorts, city, forest, and residential societies. For example, the Rashtrapati Bhavan, where the President of India lives, is on 320 acres of land.
The word “acre” originated from old English aecer meaning “open field”, German Acker, Latin ager, Sanskrit ajr, Greek agros. In English, it was historically spelled aker.
As per the Act on the Composition of Yards and Perches, dating from around 1300, an acre of land is “40 Perches in length and four in breadth”, which means 220 yards by 22 yards.