Acre

Figure 1. A comparison of areal units. In blue is metric and in orange is imperial.

The acre is a unit of area used in the Imperial system of units. One square mile is equal to 640 acres.

Useful conversions

One acre is equal to:

4047 square meters

43,560 square feet

0.001563 square miles

0.4047 hectares

Figure 1 compares the acre to other areal units.

For Further Reading

• Units
• Imperial system of units
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