Calculate concrete volume for solid vertical pillars or hollow cylindrical tubes/forms.
Tube Specifications
in
ft
%
Volume Breakdown
Ready to pour?
Select your tube type and enter dimensions to calculate total concrete volume and bag counts.
About this calculator
Overview
Whether you're pouring a solid deck footing using a Sonotube or creating a custom hollow concrete pipe/column, this calculator provides the exact volume requirements. It accounts for hollow configurations by subtracting the inner core volume from the outer cylinder volume.
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Pro Tips
When using cardboard forms, ensure they are securely braced and plumb (perfectly vertical) before starting the pour.
For hollow tubes, ensure the internal form is properly centered and secured to prevent uneven wall thickness.
Vibrate or 'rod' the concrete during the pour to remove air pockets and ensure a smooth finish against the form walls.
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Fun Facts
"Hollow concrete tubes are frequently used for drainage culverts, electrical vaults, and specialized architectural columns."
"'Sonotube' is a famous brand name for cardboard concrete forms that has become a generic term in the construction industry."
"Cylindrical shapes are structurally superior at resisting buckling forces compared to square columns of the same material volume."
