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How Many Square Feet Are in an Acre?

Part of Area & Volume

Quick answer

An acre is exactly 43,560 square feet. To convert acres to square feet, multiply by 43,560; to go the other way, divide square feet by 43,560.

The acre is a unit of land area with a fixed definition: 43,560 square feet. It comes from old farming measures (one chain by one furlong) but today it's just a constant you multiply by.

Acre conversion table

AcresSquare feet
0.25 acre10,890 ft²
0.5 acre21,780 ft²
1 acre43,560 ft²
2 acres87,120 ft²
5 acres217,800 ft²
  • 1 acre ≈ 4,047 square meters.
  • 1 acre = 4,840 square yards.
  • 640 acres = 1 square mile.
  • A standard US football field (incl. end zones) is about 1.32 acres.

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