12 inches = 1 foot
1 cubic yard = 27 cubic feet
9 inches = 0.75 foot
15 x 8 x 0.75 = 90 cubic ft = 3 and 1/3 cubic yards
I've never ordered concrete. but I suspect they'll charge you for 4 .
Cost for 3-1/3 = $100
Cost for 4 = $120
Wiki User
∙ 14y agoYou will need about 0.8 cubic yards - 1 cubic yard is a safe bet.
4.074 cubic yards for every foot the slab is thick.
10-ft x 30-ft x 4-in = 100 cubic ft.That slab weighs 3.7 times as much as 1 "yard" of concrete. (rounded)
10 cm = 0.1 meterThe volume of the slab is (6 x 8 x 0.1) = 4.8 cubic meters
You need to specify the slab's width and the length as well.
At least 3 cubic yards for a 4-inch slab. You'll need 4.75 cubic yards for a 6-inch slab.
1.25 cubic yards for a 4-inch slab. 2 cubic yards (1.85) for a 6-inch slab.
About 2.11 Cubic Yards.
2500N/m3
0.79 Cubic Yards
Approximately 12.35 Cubic Yards.
For a 4-inch thick slab you will need at least 1.2 cubic yards.
18x32 feet by 4 inches thick: 7.1 cubic yards. For a 6-inch slab, 10.7 cubic yards.
3.16 Cubic Yards
About 1/2 cubic yard will be enough.
A 22x22 foot slab at a 4-inch thickness/depth requires a minimum of 6 cubic yards.
For a 4-inch depth you will need at least 7 cubic yards.