How Many Cubic Yards?
Length in Feet X Width in feet x depth in feet (inches divide by 12 to convert to feet) then divide by 27 to get cubic yardage.
This is only an approximate calculation. The actual volume of concrete required will depend on the surface area as well as other factors like slab thickness.
We do not provide the cubic yardage calculations. We have no way of knowing if the contractor measured acurately (length, width and depth of the concrete forms). The depth for example can vary across the area of the of the forms if not excavated consistently which will change the necessary cubic yardage needed to be ordered for the project.