In order to calculate your sand needs, you’ll need to carefully measure your project’s coverage area. The calculator tool demands the area’s length, width and depth. While the length and width are fairly straight forward, depth requirements can vary. Paved walkways, for instance, typically need a 1″ sub-layer of sand. A playground, however, requires at least 9″ of sand for every 4″ of equipment (in height). Once you’ve measured out the necessary dimensions, you’ll simply input the numbers into the appropriate fields on the calculator tool and click on the “calculate” button.