### How to Calculate Quantities of Cement, Sand, Granite for .

Aug 17, 2018 · Hence, we will use 42.5 Portland-limestone cement grade and a concrete mix ratio of 1:2:4. Follow as we proceed to estimate the quantities of cement, sand, and granite that we need. Calculate the Volume of Concrete. To know the quantity of cement, sand, and granite that you need for a foundation, you need to know the volume of concrete.