It depends how thick the gravel is being laid - at 4 inches thick, a cubic yard will cover 81 square feet.
1.85 cubic yards...probably 25 bags or so
Volume = (1,200 square feet) x (1/3 foot) = 400 cubic feet = 14.81 cubic yards
630 cubic inches
137.5 cubic feet or 5.09 cubic yards.
2560 sq feet 2 inches thick
It depends how thick the gravel is being laid - at 4 inches thick, a cubic yard will cover 81 square feet.
To cover 300 square feet 4 inches thick, you would need approximately 3 cubic yards of gravel.
1.85 cubic yards...probably 25 bags or so
1 371.42857 US gallons or 5.19142188 cubic meters
If it is 4 inches deep/thick, 2 cubic yards. If it is 6 inches deep/thick, 3 cubic yards.
Volume = (1,200 square feet) x (1/3 foot) = 400 cubic feet = 14.81 cubic yards
A 9x9 foot slab 4 inches thick requires a minimum of 1 cubic yard. If you go to 6 inches thick you will need 1.5 cubic yards.
630 cubic inches
4310 sq ft X 10/12 ft = 3592 cubic ft
137.5 cubic feet or 5.09 cubic yards.
160 cubic inches / (1/8 inches) = 160*8 = 1280 sq inches