Sonotube Calculator

Your details

Inside diameter of the sonotube. Common sizes: 6, 8, 10, 12, 14, 16, 18, 20, 24 inches.
in
How deep (tall) the tube will be filled with concrete.
ft
Total number of sonotubes to fill on this project.
tubes
Extra concrete to order beyond the calculated volume. 10% is a safe standard allowance.
Choose the bag weight available at your supplier.
Enter the retail price of each bag to get a total material cost estimate.
USD
VolumeBag mix project
3.46cu ft

Total concrete volume including waste allowance

Volume0.128cu yd
Volume0.098m³
Bags needed6bags
Concrete weight501lb
Material cost48USD
Volume per tube3.14cu ft
Volume (cu ft)3.46
Volume (cu yd)0.128
Volume (m³)0.098

You need about 3.46 cu ft (0.128 cu yd) of concrete.

  • At 0.128 cubic yards, bagged concrete is the practical choice. Ready-mix trucks typically have a 1-cubic-yard minimum.
  • Estimated material cost is around $48.00 for 6 bags (80 lb), not including delivery or tax.
  • Always round up to the nearest full bag, and add a 10% waste allowance for a typical installation to avoid running short.

Next stepPick up your bags and have a rented mixer or a heavy-duty drill with a paddle attachment ready to ensure even mixing.

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