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The SI unit of surface is Square Meter [m²].
Metric System
Unit
Converter
square millimeter [mm²]
0.000001
square centimeter [cm²]
0.0001
square decimeter [dm²]
0.01
square meter [m²]
1
hectare [ha]
10000
square kilometer [km²]
1000000
are [ar]
100
Imperial System
Unit
Converter
square inch [in²]
0.00064516
square foot [ft²]
0.09290304
square yard [yd²]
0.83612736
mile
2589988.110336
imperial acre [UK]
4046.8564224
american acre [US]
4046.87261
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Round up to the
4
digits after the decimal.
Metric System
Imperial System