Three acres three inches deep is 403.33 cubic yards.
806.66 Cubic Yards
200 cubic feet or 7.4 cubic yards
6 inches = 1/6 yards. So 70 sq yards * 6 inches = 70*1/6 cubic yards = 11.66... cubic yards.
1500 sq ft * 4 inches = 1500/9 sq yards * 1/9 yards = 18.518518... cubic yards.
You would need 31.88 cubic yards of topsoil to cover 855 sq feet at 6 inches deep.
You would need approximately 2.5 cubic yards of gravel to cover a 12' by 15' area at a depth of 2 inches.
1 cubic yard will cover 15 square yards at 3 inches deep.
Usually a cubic yard will cover 15 square yards at 3 inches deep so I would reckon on 22 cubic yards. Hold on that I've got that wrong it's 2 cubic yards .Sorry.
Three acres three inches deep is 403.33 cubic yards.
You would need 3,355 cubic yards of soil to cover 6 acres at 24 inches deep.
806.66 Cubic Yards
200 cubic feet or 7.4 cubic yards
6 inches = 1/6 yards. So 70 sq yards * 6 inches = 70*1/6 cubic yards = 11.66... cubic yards.
3,495.6 cubic yards.
If it is 4 inches deep/thick, 2 cubic yards. If it is 6 inches deep/thick, 3 cubic yards.
1500 sq ft * 4 inches = 1500/9 sq yards * 1/9 yards = 18.518518... cubic yards.