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Depends on how thick it is. At 4 inches thick, you would nee about 5.5 cubic yards adjusting for safety. At 6 inches, you'd need about 8 cubic yards. You can play with different thicknesses with the linked concrete pad calculator.
1000 square feet/9 = 111.1 square yards of concrete 6 inches thick. This is the same as 111.1/4.5 = 24.7 cubic yards of concrete.
That depends on the length and width of your construction.
For 576 square feet at a depth of 4 inches, you will need 7.11 cubic yards.
472 inches = 13.1111111 yards
10 yards
6.67 Cubic Yards
How many square yards in a 20x18 feet 3 inches thick
39.1116 cubic yards
15 cubic yards
15 cubic yards
8.25 cubic yards of concrete
Depends on how thick it is. At 4 inches thick, you would nee about 5.5 cubic yards adjusting for safety. At 6 inches, you'd need about 8 cubic yards. You can play with different thicknesses with the linked concrete pad calculator.
7.1
151/9 cubic yards for every 12 inches thick
It should be a little over 19 yards.
1.62