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1 hectare = 2.4710538147 acres
There are approximately 2.47 acres in 1 hectare.
1 hectare = 2.471 acres
To a good rough approximation, 4 hectares = 10 acres.
1 ha = 2.47 acres
640 acres, algebraic steps below:
1 mi²*640 acres
1 mi²=640 acres