Concrete Mixer Batch Calculator
Estimate the number of concrete mixer batches, usable batch volume, total mixing time and batch allowance for a slab or pad.
Default project preview
10 batches
Base concrete volume
1.48 yd³
Usable volume per batch
4.8 ft³
Total mixing time
2 hr
Batch allowance
$420.00
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Project volume = length × width × thickness. The waste allowance is added. Usable batch capacity = rated capacity × load factor. Required batches are rounded up, and total time equals batches × minutes per batch.
FAQ
Concrete Mixer Batch Calculator questions
Why use less than the rated mixer capacity?+
A mixer often cannot produce a uniform batch when filled to its full geometric drum volume. The editable load factor represents usable capacity.
Does this calculate bag quantities?+
It calculates mixer batches. Use the concrete bags calculator when the goal is to estimate packaged dry mix.
When should ready-mix concrete be considered?+
A high batch count, short placement window or limited crew may make a ready-mix delivery more practical than repeated small batches.