khadim wrote:How many Square Meters in One Acre?
It depends. An acre is 43560 ft², but the feet may be either Survey Feet (1200/3937 m) or International feet (0.3048 m).
So 43560 *(0.3048)² = 4046.856 422 m²
and 43560*(1200/3937)² = 4046.872 610 m²
Prior to 1983, the second answer is correct. All geodetic work for the NAD83 datum was done in metric, and some States converted their information to survey feet, others to international feet. The US is now a mixed bag on the issue. Depends on what state. Outside the US, the first answer is correct.