Muneeb Zahid 
Most residential driveways are poured 4 inches thick, which handles cars and light trucks on a well prepared gravel base. If heavier vehicles will use the driveway, 5 to 6 inches with rebar or mesh is the safer choice, because thickness and base quality matter more than concrete strength alone. This is a sample post … Read more
Bag coverage comes down to one number per size: an 80 lb bag yields 0.6 cubic feet of concrete, a 60 lb bag yields 0.45 cubic feet and a 40 lb bag yields 0.30 cubic feet. Divide your project volume in cubic feet by the yield and you have your bag count, always rounding up. … Read more
A 10×10 slab at the standard 4 inches thick needs about 1.23 cubic yards of concrete, which works out to roughly 56 bags of 80 lb mix before any waste allowance. Add 10 percent for spillage and uneven ground and most people order 62 bags, or about 1.36 cubic yards from a ready mix truck. … Read more