Compare the concrete for each tube height.
⚙️Calculation Parameters
📊Calculated Output
How Sonotube Height Comparison Tool Works?
To compare heights, the Sonotube Height Comparison Tool holds the diameter fixed and recalculates volume for each selected height. The process takes 4 steps.
Set a fixed diameter
Pick one tube size and one pier count.
Select heights
Tick heights tied to frost depths, such as 24 in, 36 in, 42 in and 48 in.
Compare volumes
The tool lists cubic feet (ft³), cubic yards (yd³) and bags per height.
Read the increment
Each row shows the extra concrete per added foot of depth.
Sonotube Height Comparison Tool Formula
The Sonotube Height Comparison Tool uses the linear height term.
Volume ratio
V₂ ÷ V₁ = H₂ ÷ H₁At equal diameter, volume scales with height.
Per-foot rate
k = π × (D ÷ 24)²ft³ added per 12 in of depth.
Extra concrete
ΔV = k × (H₂ − H₁) ÷ 12Added by digging deeper.
Worked example: 12 in tube, 36 in vs 48 in, 8 piers
- k = 0.7854 ft³ per foot
- ΔV per pier = 0.7854 × 1 = 0.785 ft³
- 8 piers: 32 bags at 36 in vs 42 bags at 48 in
Sonotube Height Comparison Tool Conversion Table
The height comparison conversion table compares 7 heights for a 12 in (30 cm) tube, per pier and for an 8-pier deck.
| Height | ft³ | yd³ | 80 lb bags per pier | 80 lb bags for 8 piers |
|---|---|---|---|---|
| 24 in (61 cm) | 1.57 | 0.058 | 3 | 21 |
| 30 in (76 cm) | 1.96 | 0.073 | 4 | 27 |
| 36 in (91 cm) | 2.36 | 0.087 | 4 | 32 |
| 42 in (107 cm) | 2.75 | 0.102 | 5 | 37 |
| 48 in (122 cm) | 3.14 | 0.116 | 6 | 42 |
| 60 in (152 cm) | 3.93 | 0.145 | 7 | 53 |
| 72 in (183 cm) | 4.71 | 0.175 | 8 | 63 |
Each extra foot of 12 in tube adds 0.785 ft³ (22.2 L).
What is Sonotube Height Comparison Tool?
A Sonotube Height Comparison Tool is a side-by-side tool that compares concrete quantities for one tube diameter at several heights.
Depth is set by frost line, soil and code, and it changes between regions and between sites with fill soil. The tool shows what each extra 6 in or 12 in of depth costs in concrete. An 8-pier deck of 12 in tubes needs 10 more 80 lb bags at 48 in than at 36 in.
Volume grows in a straight line with height, so the per-foot rate makes quick mental math possible.
What are the uses of Sonotube Height Comparison Tool?
There are 4 main uses of the Sonotube Height Comparison Tool.
Frost depth changes
Builders compare the code depth with a shallower plan.
Regional quotes
Contractors working in 2 climate zones compare pier costs.
Fill-soil sites
Engineers price extra depth to reach firm soil.
Reveal choices
Designers compare tall and short above-grade reveals.
🔗Related Sonotube Calculators
View all 106 subtools →Sonotube Measurement Range Calculator
See the volume for a range of sizes.
Sonotube Diameter Comparison Tool
Compare the concrete for each tube width.
Sonotube Volume Calculator
Find how much concrete fills a round tube.
Sonotube Cubic Yards Calculator
See your concrete in cubic yards.