Formula used
Concrete volume = [π × (diameter ÷ 2)² × height ÷ 27] × (1 + waste ÷ 100), after converting diameter to feet
Worked concrete cylinder example
Concrete Cylinder Calculator example: π × (15.5 in ÷ 12 ÷ 2)² × 3 ft = 3.93 ft³. Applying 10% gives 0.16 yd³; round any bag conversion to whole packages.
From calculated volume to an order
Use cubic feet for small cylinders and cubic yards for larger placements; bag conversions assume packaged concrete yield, not laboratory batching.
Where a concrete takeoff can drift
Domed tops, embedded items, incomplete fill, form tolerance, and multiple specimens change the exact volume.
Questions specific to this calculation
Which diameter and height define the concrete cylinder placement?
Enter cylinder inside diameter and filled height. The formula works for piers, cores, and cylindrical placements, but the feet-based height field may be inconvenient for small test specimens.