How this estimate works
The calculator applies: length x width x depth x (1 + waste/100). Keep measurements in one unit system and round up when suppliers sell whole units.
Limitations
Footings, slopes, reinforcement, truck minimums, and site access require a supplier check.
Source to check
Read the authoritative guidance for concrete calculator
Frequently asked question
Why add waste? Small spills, uneven excavation, and overbreak make the theoretical volume optimistic.