These calculators convert imperial to metric and metric to imperial units of area.
There are two results of each conversion - the first is combined, second is absolute.
For example, 1 acre will be:
First - 40 ares AND 47 square meters AND 8564 square centimeters
Second - 40.47 ares OR 4046.8564 square meters OR 40468564.22 square centimeters.