This process is intended for small non-structural repair or replacement of equipment with commercial projects where the building owner can obtain a permit to repair or replace the same or existing features of a building without architectural plans.
1 Mark the area that will need concrete and divide it into smaller areas. 2  Calculate its volume of the area after determining the shape of the area (see chart below) by multiplying in the height.  Convert the volume from feet to cubic yards to get the number of cubic yards of concrete youâll need.
You can calculate the cubic yards and tonnage of gravel needed if you know the dimensions of the driveway and the density of the material. To calculate the amount of materials in cubic yards, multiply the length and average width of the driveway, in feet.If the driveway is curved, measure the length of the curve going down the center of the driveway. Multiply this number by the depth, in inches. And finally, divide by 324 to convert to cubic yards.o calculate the amount of materials in cubic yards, multiply the length and average width of the driveway, in feet. If the driveway is curved, measure the length of the curve going down the center of the driveway.