None.
A foot is a measure of distance. A cubic foot is a measure of volume. The two measure different things and it makes no sense at all to try to convert from one to the other.
0.5 cu ft
60 x 40 x .05 = 1200 cubic feet, divided by 27 (as there are 27 cubic feet in a cubic yard) answer 44.44 cubic yards
2727 cubic feet
0.52 cubic yards = 14.04 cubic feet.
1695.104 cubic feet.
7,062.93 cubic feet.
53.33 cubic feet.
1.636254 cubic feet
35.315 cubic feet.
176.57 cubic feet.
3.88461 cubic feet.
There is one cubic feet per cubic foot.
There are 27 cubic feet in one cubic yard.