To use the Product Calculator, please enter the length, width, and thickness of the job. Be sure to verify feet or inches for the thickness. Usually 4 to 6 inches is sufficient for a residential driveway where commercial or industrial lots should use 8 to 10 inches. Next, click on either Sub Base, Base, or Custom to select the density of the product. The Subbase and Base selections will fill in the density of the rock for you; the Custom selection allows you to enter a rock density in the Density field. Finally, click on the Calculate button. The calculator will estimate the number of tons of aggregate that will be required.