The amount of concrete will depend upon the depth you require. Multiply the area in square yards by the depth in yards and you will get the volume in cubic yards of concrete you will require:
3 ft = 1 yd
→ 3 ft x 3 ft = 1 yd x 1 yd
→ 9 sq ft = 1 sq yd
→ 852 sq ft = 852 ÷ 9 sq yd
= 942/3 sq yd
36 in = 1 yd
eq for 6 in depth:
volume = 942/3 sq yd x 6/36 yd
= 157/9 cu yds required
ordering 16 [cubic] yards of concrete will give you [just over] a 6 inch deep slab over that area.
eq for 9 in depth: volume = 942/3 sq yd x 9/36 yd
= 232/3 cu yds required
ordering 24 [cubic] yards of concrete will give you [just over] a 9 inch deep slab over that area.
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The answer depends on whether you mean 114 feet squared or a square 114 feet by 114 feet. The answer to the first scenario is 76 square yards of concrete. The answer to the second scenario is 8,664 square yards of concrete.
One square yard is nine square feet, so 27 square feet is equivalent to 3 square yards. So 3 yards of concrete will cover 27 square feet.
39.1116 cubic yards
90
For a 4-inch depth you will need 7.41 cubic yards.