Columns / Pilasters Calculator
Calculate CMU courses, support-unit quantities, filled cores and grout volume for integrated wall pilasters or freestanding masonry columns.
Support Geometry
Enter Support Information
CMU Layout
Mortar joint included: Course calculations use the nominal installed module, which includes the typical mortar joint.
These units physically form part of the pilaster but are already counted in the main wall takeoff.
These are the additional blocks that must be purchased beyond the normal wall-plane block.
Enter the actual CMU arrangement used in one complete course of the column.
Core Fill / Grout
Enter 0 for no grout, 1 for one filled core per unit, 2 for both cores in a typical two-core unit, or another value appropriate to the unit being used.
Block & Course Results
For an integrated pilaster, the purchase quantity includes only additional pilaster CMU beyond blocks already counted in the wall. For a freestanding column, all column blocks are included.
Core Fill / Grout Results
Grout volume remains zero until a grout volume per filled core is entered. This prevents the calculator from silently assuming the internal void geometry of the CMU being used.
Columns / Pilasters Reference
Integrated Pilaster
An integrated pilaster is bonded into the wall. Some CMU in the pilaster also form part of the normal wall plane.
The calculator therefore separates physical support units from the additional units that must be added to the wall takeoff.
Freestanding Column
A freestanding masonry column is independent of the wall-panel block count. All CMU used in each course of the column are included in the purchase quantity.
Course Height
Standard nominal CMU layout commonly uses an 8-inch vertical module, including the mortar joint.
A 6-foot support therefore contains nine 8-inch courses. Custom nominal block heights can also be entered.
Grout Capacity
Nominal block dimensions do not determine grout capacity by themselves. Internal webs, shells, core geometry and specialty units vary.
Use a manufacturer or otherwise verified grout-fill factor for the actual CMU being installed.
Width & Depth
Width and depth are shown on the top-view diagram for layout reference. The calculator does not automatically infer a CMU bond pattern from those dimensions.
Enter the actual blocks-per-course arrangement being used so material quantities reflect the intended construction.
Structural Design
This tool provides layout and material quantities. It does not determine required column size, pilaster spacing, reinforcing steel, footing dimensions or structural capacity.