Concrete Column Calculator
Calculate concrete for round or square columns, including repeated columns.
Enter your project details
Each dimension can use its own unit—for example feet for length and inches for thickness. Package counts are rounded up.
Formula and calculation steps
Volume = π × radius² × height × count- Calculate one cylindrical column.
- Multiply by 4 columns.
- Divide by 27 and add allowance.
Worked example
Enter one column size and the number of identical columns; the result shows the full pour volume.
How to use this calculator
- Choose round or square column shape.
- Enter diameter or side, height and column count.
- Add waste % to size the pour.
Example: Enter one column size and the number of identical columns; the result shows the full pour volume.
Questions about this calculator
Can I calculate multiple identical columns?
Yes. Enter one column size and the quantity; the result multiplies volume across all columns.
Round or square—does it matter?
Yes. Round uses diameter; square uses side length. Pick the shape that matches your forms.
Can I use mixed units?
Yes. Choose feet, inches, metres or centimetres and the calculator converts each input before calculating.
Is this a final material order?
No. Confirm drawings, product coverage, local code and site conditions before buying or building.
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<iframe src="https://www.buildcalclab.com/embed/concrete-column-calculator/?theme=light" width="100%" height="640" title="BuildWise calculator" style="border:0;max-width:720px"></iframe>Assumptions and references
Results are estimates based on the dimensions and values you enter. Verify final quantities, manufacturer coverage and site-specific requirements before ordering.
Last reviewed: July 2026 · Read our calculation methodology