Turn a known net slab volume into an order quantity while keeping waste transparent. Enter the takeoff volume, expected placement loss, and supplier order increment. The calculator shows allowance volume, rounded order volume, and the amount above the net takeoff. This keeps rounding separate from physical waste and avoids hiding both adjustments inside one percentage.
The result combines your explicit field-loss allowance with supplier increment rounding.
Choose the allowance from actual job conditions and company records rather than treating the default as a universal recommendation.
For 12.4 yd³ net, 6% adds 0.744 yd³. The adjusted 13.144 yd³ rounds up to 13.25 yd³ in 0.25 yd³ increments.
Usually not. Field variation and handling loss can justify a separate allowance, which this calculator displays explicitly.
Convert every dimension to the unit shown by the field before calculating.
No. The result covers concrete volume unless an input or output explicitly says otherwise.
They often have different dimensions, placement conditions, and waste assumptions.
No. Confirm dimensions, specifications, and order increments with the project documents and supplier.
| Item | How it is used |
|---|---|
| Waste allowance volume | Calculator input in the displayed unit |
| Before order rounding | Calculator input in the displayed unit |
| Total above net volume | Calculator input in the displayed unit |