What this concrete column calculator calculates
One 12 in diameter column that is 3 ft high contains 2.356 ft³ before waste. Two identical columns need 4.712 ft³ before waste.
Formula
π × (diameter ÷ 24)² × height in feet × count = cubic feet.
Worked example
Two 12 in × 3 ft columns require 4.712 ft³ before waste. At 0.60 ft³ per 80 lb bag, that rounds to 8 bags with no waste.
Ordering decision
Check the column size, reinforcement, bearing, and connection design with the project plans.
The page cites the applicable Uzi Tools reference table beside the calculator. Product labels, current editions, local code, and a licensed professional govern structural, electrical, and life-safety work.
How to use it
- Enter the measured dimensions and keep the displayed units beside each field.
- Review the concrete for round columns result and the substituted formula before ordering.
- Adjust waste for the layout, cut pattern, product package, and site conditions.
- Copy or print the material list, then verify the cited product data and local requirements.
Concrete for round columns
This column calculator uses cylindrical geometry for round concrete columns and multiplies one column by the count. The input height is a length, while diameter controls the circular area.
Limits and professional review
Measurements, product yield, waste, moisture, and site conditions can change the order quantity. Local code and a licensed professional govern structural and electrical work.