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Oct 31, 2003 ... Acres to Square Kilometers (ac to km²) conversion calculator for ... A measurement of area equal to one kilometer length by one kilometer width. - read more

Used widely in the US customary system and the Imperial system, an acre is a unit of area equal to 1/640 of a square mile, or 0.4047 of a hectare, or 43,560 ... - read more

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