how many cubic yards is this

[guest1]

redoing driveway it measures

12ft x 80ft and 6in thick how much material do I need? in cubic yards

[Guest]

redoing driveway it measures

12ft x 80ft and 6in thick how much material do I need? in cubic yards

5" = 0.5' so
12' x 80' x 0.5' = 480 cu ft
27 cu ft = 1 cu yd (3 x 3 x 3)
so 17.8 cu yd.

I don't know if any allowance needs to be made for packing down when rolled, but round up.