One acre equals 1⁄640 (0.0015625) square mile, 4,840 square yards, 43,560 square feet, or about 4,047 See more

In the international yard and pound agreement of 1959, the United States and five countries of the Commonwealth of Nations defined the international yard to be exactly 0.9144 metre. The US authorities decided tha… See more

The acre is commonly used in many current and former Commonwealth countries by custom, and in a few it continues as a statute measure. These include Antigua and Barbuda, American Samoa, The Bahamas, … See more

1 international acre is equal to the following metric units:
• 0.40468564224 hectare (A square with 100 m sides has an area of 1 hectare.)
• 4,046.8564224 square metres (or a square with approx… See more

The word acre is derived from Old English æcer originally meaning "open field", cognate with west coast Norwegian ækre, Icelandic akur, Swedish åker, German Acker, Dutch akker, Latin ager, Sanskrit ajr, and Greek αγρό… See more

• Customary acre – The customary acre was roughly similar to the Imperial acre, but it was subject to considerable local variation similar to the variation in carucates, virgates, bovates, nooks, and farundels. These may have been … See more