How this calculator works
Enter the values for value, rate (%) and review the units before calculating.
Formula / method
Volume = length × width × depth
Worked example
A 6 m × 4 m slab at 0.15 m depth requires 3.6 m³ before waste.
Assumptions and limitations
The shape is rectangular and dimensions are measured in meters.
Order quantities should include a project-specific waste allowance and professional site review.