The volume of material required is calculated using the area (Length x Width) multiplied by the depth required.
For example if you have an area to fill of 3m by 5m and to a depth of 1.5m the calculation is as follows;
- 3m(L) x 5m(W) = 15 square metres (15m2)
- 15m2 x 1.5m(D) = 22.5 cubic metres (22.5m3)
Most sand and quarried materials will compact by approximately 25% adding this to the equation we get the following:
- 22.5m3 + 25% = 28m3
so to fill a hole 3mx5m to a depth of 1.5m I would require 28m3 of material.