From Sand and Ash discussion

A sand calculator is a tool specially designed to do calculations, Finding out the required amount of building material is a difficult task, if there is any error in the building material calculation we can’t complete the project or sand is lying around after the earthwork completed, Paver sand calculator is a solution to these problems. Commonly there are five steps in this calculation the first step determines the length and width of the cuboidal excavation. In the second step calculate the area of the excavation by multiplying the length with width. Establish the depth of the excavation; in the fourth step multiply the area by the depth of the excavation to obtain its volume.