None.
A foot is a measure of length or distance while an acre is a measure of area. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.
1.18 acres = 51,400.8 sq feet.
3.09917 acres.
20.89 acres.
How many acres are 310 feet * 630 feet
108,000 square feet or 2.479 acres.
18.59 acres
About 17.2 acres.
2.75 acres.
2.083 acres.
5 acres.
0.98 acres.
18.2 acres.