See how many full tubes your concrete fills.
⚙️Calculation Parameters
📊Calculated Output
How Available Concrete Tube Count Calculator Works?
To count fillable tubes, the Available Concrete Tube Count Calculator divides the concrete on hand by the volume of 1 tube and rounds down. The process takes 4 steps.
Enter available concrete
Type the volume in cubic yards (yd³), cubic feet (ft³), cubic meters (m³) or bags.
Enter the tube size
Type the diameter and depth of the tubes to fill.
Divide and round down
The calculator divides available volume by tube volume and keeps the whole number.
Read the remainder
The tool shows the leftover concrete and how high it fills one more tube.
Available Concrete Tube Count Calculator Formula
The Available Concrete Tube Count Calculator uses floor division.
Complete tubes
N = ⌊V_avail ÷ V_tube⌋⌊ ⌋ means round down to a whole tube.
Leftover
V_left = V_avail − N × V_tubeConcrete after N tubes.
Partial height
h = V_left ÷ (π × (D ÷ 24)²) × 12Inches of fill in tube N + 1.
Worked example: 1 yd³ (27 ft³) for 12 in × 48 in tubes
- V_tube = 3.142 ft³
- N = ⌊27 ÷ 3.142⌋ = ⌊8.59⌋ = 8 tubes
- V_left = 1.87 ft³, filling 28.5 in of tube 9
Available Concrete Tube Count Calculator Conversion Table
The tube count conversion table lists complete tubes filled by 0.5 yd³, 1 yd³ and 2 yd³ (0.38 m³, 0.76 m³ and 1.53 m³) of concrete.
| Tube size | ft³ per tube | Tubes from 0.5 yd³ | Tubes from 1 yd³ | Tubes from 2 yd³ |
|---|---|---|---|---|
| 8 in × 36 in | 1.05 | 12 | 25 | 51 |
| 10 in × 48 in | 2.18 | 6 | 12 | 24 |
| 12 in × 48 in | 3.14 | 4 | 8 | 17 |
| 16 in × 48 in | 5.59 | 2 | 4 | 9 |
| 18 in × 60 in | 8.84 | 1 | 3 | 6 |
Counts round down. Leftover concrete partly fills one more tube.
What is Available Concrete Tube Count Calculator?
An Available Concrete Tube Count Calculator is a reverse tool that counts how many complete tubes a known volume of concrete fills.
The calculator answers a planning question from the supply side. One yard of ready-mix fills 8 tubes of 12 in × 48 in with 1.87 ft³ left over. A pallet of bags fills a known number of fence posts. The tool shows the count and the leftover before the pour starts.
Rounding down is deliberate. A half-filled pier is not a finished pier, so the count lists only full tubes.
What are the uses of Available Concrete Tube Count Calculator?
There are 4 main uses of the Available Concrete Tube Count Calculator.
Minimum-load use
Contractors place extra tubes to use the full minimum truck load.
Pallet planning
Builders see how many posts one pallet covers.
Phased pours
Crews decide how many piers go in today with the concrete on site.
Leftover planning
Site leads prepare spare forms for leftover truck concrete.
🔗Related Sonotube Calculators
View all 106 subtools →Sonotube Partial Fill Calculator
Find the concrete for a tube you fill part way.
Sonotube Remaining Fill Calculator
See how much is left after part of the pour.
Sonotube Fill Percentage Calculator
See what share of the tube is full.
Sonotube Top-Up Calculator
Find the concrete you need to top up a tube.