640 acre is how big?
1 square mile
1 acre = 0.4046856 hectares
640 acres = appr 259 hectares
or, it depends if you mean
a Scottish acre
an Irish acre
a Cheshire acre
or a Roman acre , each of which has a different value,
pointing out the silliness of the Imperial system of measurement
why is the Imperial system any worse than the Cheshire system? Fie on thee, sirrah - hie thee hence!
To understand the size of 640 acres, it's helpful to provide some comparisons.
One acre is equivalent to an area of 43,560 square feet. If we multiply this by 640, we get:
640 acres * 43,560 square feet/acre = 27,878,400 square feet.
Another common comparison is to convert acres to square miles. There are 640 acres in a square mile. So, if we divide 640 acres by 640, we get:
640 acres / 640 acres/square mile = 1 square mile.
Therefore, 640 acres is equal to 27,878,400 square feet or 1 square mile in size.