Worked exampleSee the calculation with sample numbers
1,200 sq ft at 3 inches deep with 10% extra equals 330 cu ft, 12.22 cu yd, or 165 two-cu-ft bags.
What can change the result?
Compaction, settling, and supplier package sizes can change the amount you need.
How this was calculated: Cubic feet, cubic yards, number of whole bags and budget estimate.