Concrete Column Calculator
Treated as right circular cylinders; enter the number of identical columns.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Measure diameter across the formed column or sonotube ID. Height is lift to top of pour.
What the math is doing
Volume = π × (d/2)² × height × column count.
Frequently asked questions
Square columns?
Use the wall calculator with length=width for square section.
Tapered?
Average diameter or split into segments.
Caps and corbels?
Add separately.
Post bases?
Hardware is not included.