Convert Acre to...

Unit system metric
Unit of area
Symbol acre
Unit conversions
1 acre in ... ... is equal to ...
SI units 4046.85 m2
Imperial/US unit(s) 160 rd2

I want to convert: using

Metric Conversion
Square kilometre [km2]
Hectare [ha]
Are [a]
Square metre [m2]
Square decimetre [dm2]
Square centimetre [cm2]
Square millimetre [mm2]
Square micrometre [µm2]
Square nanometre [nm2]
British/Imperial Conversion
Square mile [mi2]
Square rod [rd2]
Square yard [yd2]
Square foot [ft2]
Square inch [in2]
Japanese Conversion
Other Conversion
Metric dunam
Cypriot dunam
Iraqi dunam
Greek stremma
Football pitch

The acre is a unit of land area used in the imperial and US customary systems. It is defined as the area of 1 chain by 1 furlong (66 by 660 feet), which is exactly equal to 1/640 of a square mile, 43560 square feet, approximately 4,047 m2, or about 40% of a hectare.

The international symbol of the acre is ac. The most commonly used acre today is the international acre. In the United States both the international acre and the US survey acre are in use, but differ by only two parts per million. The most common use of the acre is to measure tracts of land. One international acre is defined as exactly 4046.8564224 square metres.

A square enclosing one acre is approximately 69.57 yards, or 208 feet 9 inches (63.63 metres) on a side. As a unit of measure, an acre has no prescribed shape; any area of 43.560 square feet is an acre.

This article uses material from the Wikipedia article "Acre", which is released under the Creative Commons Attribution-Share-Alike License 3.0.