A cubic yard falls just short of what youre looking for. Do your own research I guess. That's why you hire a carpenter or a mason to do work and estimates for you. Because you don't know what youre doing when it comes to keeping the work simple. Numerically.
about 17 yards of concrete (it's sold by the cubic yard)
If it is 4 inches deep/thick, 2 cubic yards. If it is 6 inches deep/thick, 3 cubic yards.
9x12 feet at 4 inches deep: 1.3 cubic yards.
12 x 12 feet, 4 inches deep: 1.8 cubic yards, minimum.
To calculate the volume of concrete needed for a slab that measures 74 inches long, 48 inches wide, and 4 inches thick, first convert the dimensions to feet: 74 inches = 6.17 feet, 48 inches = 4 feet, and 4 inches = 0.33 feet. Then, multiply the dimensions: 6.17 ft × 4 ft × 0.33 ft = approximately 8.16 cubic feet. Therefore, you will need about 8.16 cubic feet of concrete for the slab.
54sqare feet
128
12.30 cubic yards
about 17 yards of concrete (it's sold by the cubic yard)
If it is 4 inches deep/thick, 2 cubic yards. If it is 6 inches deep/thick, 3 cubic yards.
800 C feet
18.6240 yd³
you would need 37.33 yards of concrete or 38 to be safe
9x12 feet at 4 inches deep: 1.3 cubic yards.
3536 sqft 6 inches deep = 3536*0.5 cubic feet = 1768 cu ft = 65.48 cubic yards (approx).
If it is the same as concrete it will cover 162 square feet. concrete covers 81 square feet by 4" deep
12 x 12 feet, 4 inches deep: 1.8 cubic yards, minimum.