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m², ft², acre, hectare and more.
The area converter changes a surface measurement between metric units (mm², cm², m², hectare, km²) and imperial/US units (in², ft², yd², acre, mi²) — handy for real estate, land, flooring and mapping.
Every unit is defined by how many square metres it equals, so the tool converts to m² first and then to your target unit for accurate results.
Key definitions: 1 ft² = 0.09290304 m², 1 acre = 4046.8564224 m², 1 hectare = 10000 m².
An acre is 43,560 square feet, about 4046.86 m², or roughly 90% of an American football field. It equals 0.4047 hectares.
Because area grows with the square of length. Since 1 m = 100 cm, 1 m² = 100 × 100 = 10,000 cm².
The international acre (4046.8564224 m²). The US survey acre differs by a few parts per million and is not used here.