Block-Core Fill Calculator
Estimate grout or concrete fill volume, bag quantity, weight and cost for filled concrete-masonry-unit cores.
Default project preview
2.85 yd³
Grout bags
129
Filled block equivalent
500
Placed weight
5,064 kg
Volume per block
0.14 ft³
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.
Fill volume = block count × selected fill percentage × fill volume per block × allowance. Bags = round up (fill volume ÷ bag yield).
FAQ
Block-Core Fill Calculator questions
Are all concrete blocks filled completely?+
Not necessarily. Structural drawings may specify only reinforced cells, bond beams or full grouting.
How do I find fill volume per block?+
Use the block manufacturer net-area or grout-fill table for the exact unit.
Does rebar displacement matter?+
It reduces volume slightly, but project tolerances and waste often exceed that difference.