The square meter, symbolized as m\\(^2\\) or m², is the SI unit of area. It represents the area of a square with sides one metre long. It is widely used in construction, real‑estate, agriculture, and scientific research.
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Acre (ac)
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An acre is a non‑SI unit of area commonly used in the United States, United Kingdom, and other countries for land measurement. One acre equals 43,560 square feet, or about 4,046.86 square metres.
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Conversion factor
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To convert square metres to acres, multiply by the factor \\(0.0002471053814671653\\). In MathJax notation: \\(1\\,\\text{m}^2 = 0.0002471053814671653\\,\\text{ac}\\).
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Use this conversion when you need to translate property sizes, farm plots, or any land area from metric to imperial units.
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Conversely, divide by the same factor to go from acres to square metres.
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Square meter to Acre Conversion Reference Table
Square meter (m²)
Acre (ac)
0.1
2.4711e-05
0.5
1.2355e-04
1.0
2.4711e-04
2.0
4.9421e-04
5.0
0.0012
10.0
0.0025
20.0
0.0049
50.0
0.0124
100.0
0.0247
500.0
0.1236
1000.0
0.2471
Example: Convert 10 m² to acres
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Step 1: Write down the value and the conversion factor.
One square metre equals \\(0.0002471053814671653\\) acre. Conversely, one acre equals \\(1 \\div 0.0002471053814671653 \\approx 4046.86\\) square metres.
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The factor is derived from the exact definition of an acre (43,560 ft²) and the exact conversion of feet to metres (1 ft = 0.3048 m). It is accurate to at least 12 decimal places, which is more than sufficient for most engineering and land‑use calculations.
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"On fait la science avec des faits, comme on fait une maison avec des pierres ; mais une accumulation de faits n'est pas plus une science qu'un tas de pierres n'est une maison." "Science is built up of facts, as a house is built of stones; but an accumulation of facts is no more a science than a heap of stones is a house." — Henri Poincaré (French Mathematician, Theoretical Physicist & Mining Engineer)