To calculate the number of 80 lb bags of cement needed for a 10x12 foot slab that is 3 inches thick, first determine the volume of the slab in cubic feet: 10 ft x 12 ft x (3/12) ft = 30 cubic feet. One 80 lb bag of cement typically yields about 0.6 cubic feet of concrete. Therefore, you would need approximately 30 / 0.6 = 50 bags of 80 lb cement to complete the slab.
how many bags of cement for a pad 4x7x4 inches thick
You will need a minimum of 18.96 cubic yards.
A minimum of 5.93 cubic yards is needed.
0.86 cubic yards is needed.
You'll need 1 cubic yard.
how many bags of cement for a pad 4x7x4 inches thick
1.85 cubic yards of cement.
10x12=120. So the answer is 120 square feet.
5.93 cubic yards.
4yard
A 16' x 8' by 4" slab requires 3.56 cubic yards of cement.
about 25 yds
You will need a minimum of 18.96 cubic yards.
A minimum of 5.93 cubic yards is needed.
0.86 cubic yards is needed.
You'll need 1 cubic yard.
Without knowing the area, there is no way to answer.