How many 94lbs bags of cement does it take complete 12x12 slab?

To determine how many 94-pound bags of cement are needed for a 12x12 slab, first calculate the volume of the slab. A 12x12 slab that's 4 inches thick has a volume of 4 cubic feet (12 x 12 x 0.33). One 94-pound bag of cement yields about 0.6 cubic feet when mixed. Therefore, you'll need approximately 7 to 8 bags of cement to complete the slab.