Concrete Column Calculator

Your details

Outside diameter of the round column or post.
in
Total height (length) of the column from base to top.
in
How many identical columns you are pouring.
columns
Extra concrete to order for overfill, spillage, and formwork irregularities. 5-10% is typical.
%
Standard pre-mix bag weight. Each 80 lb bag yields about 0.60 cu ft.
Optional: cost per cubic yard (imperial) or per cubic meter (metric). Leave 0 to skip cost.
/yd³
Volume (with waste)Small pour
0.128yd³

Total concrete to order, including waste allowance

Volume (cu ft)3.46ft³
Bags needed6
Net volume (no waste)0.116yd³
Net volume (yd³)0.116
With waste (yd³)0.128

You need approximately 0.128 cubic yards of concrete.

  • Total concrete needed (including 10% waste): 0.128 yd³ (3.46 ft³).
  • You need 6 x 80-lb pre-mix bags. Buy in whole bags and keep spares for topping off.

Next stepMix bags in batches sized to your project pace - concrete begins to set within 30-60 minutes of mixing.

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