14 Inch Sonotube: How Much Concrete?
A 14 in Sonotube holds 1.07 cu ft of concrete per foot (π × r²). A 4 ft tube takes 4.3 cu ft: 8 bags of 80 lb or 10 bags of 60 lb Quikrete Concrete Mix. Sonoco's round-forms table lists 0.475 cu yd for a 12 ft column.
Concrete by tube length
| Tube length | Cu ft | Cu yd | 80 lb bags | 60 lb bags |
|---|---|---|---|---|
| 2 ft | 2.1 | 0.08 | 4 | 5 |
| 3 ft | 3.2 | 0.12 | 6 | 8 |
| 4 ft | 4.3 | 0.16 | 8 | 10 |
| 6 ft | 6.4 | 0.24 | 11 | 15 |
| 8 ft | 8.6 | 0.32 | 15 | 20 |
| 12 ft | 12.8 | 0.48 | 22 | 29 |
Your tubes
Set up for: 14 in sonotubes · Different project?
Other sizes: 6 in · 8 in · 10 in · 12 in · 16 in · 18 in · 24 in · all sizes
FAQ
How many bags of concrete for a 14 inch sonotube?
1.78 bags of 80 lb Quikrete Concrete Mix per foot of tube, so 8 whole bags for a 4 ft tube and 29 for four of them.
Is a 14 inch sonotube big enough for my deck?
We don't size footings. The diameter and depth come from your deck plans, an engineer or your local building department; this page turns that size into concrete.
Sources
- Sonoco: Sonotube Builder's Tube concrete forms (concrete chart) · fetched and reviewed 2026-11-10
- Sonoco: Sonotube Round concrete forms brochure (concrete requirements table) · fetched and reviewed 2026-11-10
- Quikrete: QUIKRETE Concrete Mix (No. 1101) data sheet · fetched and reviewed 2026-11-10
Volumes only. ConcreteMath calculates volumes, bag counts, weights and your own cost figures. It gives no structural or engineering advice and never sizes footings, piers, slabs or rebar: those come from your plans, an engineer or your local building department. Bag counts are estimates from each maker's published yield; actual use varies with hole shape, uneven ground, waste and mixing. Bulk weights are published ranges; your supplier's figure wins.