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Metric to imperial area converter

Convert square kilometres, square metres, ares and hectares to square inches, square feet, square yards, acres and square miles, and back.

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Acre

2.471053815 ac

Equivalents

Square kilometre0.01 km²
Hectare1 ha
Are100 a
Square metre10000 m²
Square inch15500031 in²
Square foot107639.1042 ft²
Square yard11959.90046 yd²
Acre2.471053815 ac
Square mile0.003861021585 mi²

The equivalences come from squaring the length ones (1 inch = 2.54 cm):

  • 1 in² = 6.4516 cm²
  • 1 ft² = 0.09290304 m²
  • 1 yd² = 0.83612736 m²
  • 1 acre = 4840 yd² ≈ 4046.86 m² ≈ 0.4047 ha
  • 1 mi² = 640 acres ≈ 2.59 km²

Use cases

  • Understanding home sizes listed in square feet.
  • Converting farms or parks from acres to hectares.
  • Comparing state or county areas in square miles.

How it works

  1. 1

    Type the amount

    Decimals with a dot or a comma are accepted, as are negative values.

  2. 2

    Pick the units

    Choose the source and target units; the result and the equivalents table update instantly.

Technical details

  • The acre is the international acre; the US survey acre differed by 4 parts per million.
  • Results use 10 significant figures; very large or very small values are shown in scientific notation (e.g. 1e-10).

Frequently asked questions

How many hectares are in an acre?

About 0.4047 ha; one hectare is about 2.47 acres.

How many square feet are in a square metre?

About 10.764 ft².

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