Estimate material for round and rectangular structural columns. Switch between US customary and metric units, adjust the assumptions, and keep every step visible.
Inputs are converted to a common base unit before calculation. Purchase quantities are rounded only at the final buying boundary.
The calculated total after the entered allowance is 1.02 yd³. The suggested concrete order is 1.25 yd³, after rounding to a 0.25 yd³ supply increment. The intermediate volume and purchase quantity are intentionally different: the supplier increment is applied after the allowance, not as another percentage.
Supports basic solid-volume relationships. Combining shapes and applying editable site allowances are this site's model; the reference does not specify product yield, structural dimensions, or installation requirements.
Government guidanceNIST unit conversion factors ↗NIST is cited only for unit-conversion definitions. Round and square column volumes are derived from cross-sectional area × height × count. This does not establish structural dimensions or a delivery increment.
It is the full diameter across the section. Entering a radius as the diameter quarters the section area. Check the label before converting a plan dimension into the chosen input unit.
No. The volume covers the entered column section and height only. Calculate the footing separately, and count any overlap with the column or pedestal only once.
Use measured form dimensions and an allowance appropriate to placement and supplier delivery. Treat changes in section, height, embedded bases and irregular capitals separately; do not increase the diameter merely to represent general spill. The example dimensions are not a recommendation for your project.
Details specific to concrete column planning.
Choose the actual round or square section. For round columns enter diameter, not radius; for square columns enter side length. Group only columns with the same section and height, and calculate separate footings or bases independently.
Cross-sectional area times height and count gives the raw column volume. The selected allowance increases that total before supply-increment rounding. Round volume uses πd²/4; square volume uses side², so the section choice matters.
Use measured form dimensions and an allowance appropriate to placement and supplier delivery. Treat changes in section, height, embedded bases and irregular capitals separately; do not increase the diameter merely to represent general spill.
The model does not size a structural column, specify reinforcement, assess form pressure or deduct displacement. Tapered columns and mixed sizes require separate geometry; form capacity and safe placement remain project-design decisions.
