What the numbers mean.
Volume is length × width × depth, with all dimensions in metres. Concrete waste is added to that net volume. Excavated soil weight uses the in-situ volume and your chosen density; the bulking factor changes the loose volume after digging.
Indicative loads are rounded up from estimated tonnes divided by payload. Vehicle volume, road restrictions, access, material classification and the receiving facility can change the actual requirement. The defaults are editable examples, not measured characteristics of your site.
A rate you enter produces a simple quantity allowance. It does not automatically include labour, plant, transport, disposal fees, engineering, testing or VAT. Send the estimate with your enquiry so the team can review the real scope.