See how many full tubes to buy.
⚙️Calculation Parameters
📊Calculated Output
How Sonotube Purchase Quantity Calculator Works?
To count forms to buy, the Sonotube Purchase Quantity Calculator works out how many pier cuts fit in each stock tube and rounds up to whole tubes. The process takes 4 steps.
Enter piers by size
Type each diameter, pier count and cut length.
Pick stock lengths
Choose the lengths the store sells, such as 4 ft (1.22 m) and 12 ft (3.66 m).
Count cuts per tube
The calculator finds how many full cuts fit in one stock tube.
Round to whole tubes
The tool divides the pier count by cuts per tube and rounds up.
Sonotube Purchase Quantity Calculator Formula
The Sonotube Purchase Quantity Calculator uses whole-cut division.
Cuts per tube
k = ⌊S ÷ (h + kerf)⌋S is stock length and h is cut length.
Tubes to buy
T = ⌈n ÷ k⌉n piers of the same length.
Spare tube
T_buy = T + 1, if damage risk is highCovers crushed ends.
Worked example: 9 piers at 54 in, 12 in diameter, 12 ft stock
- k = ⌊144 ÷ 54⌋ = 2 cuts per tube
- T = ⌈9 ÷ 2⌉ = 5 tubes of 12 ft
- Leftover = 5 × 144 − 9 × 54 = 234 in (19.5 ft) of offcut
Sonotube Purchase Quantity Calculator Conversion Table
The purchase quantity conversion table lists 5 pier groups with cuts per 12 ft tube and the whole forms to buy.
| Diameter | Piers × length | Cuts per 12 ft | 12 ft tubes | 4 ft tubes (1 per pier) |
|---|---|---|---|---|
| 8 in | 12 × 42 in | 3 | 4 | 12 |
| 10 in | 8 × 48 in | 3 | 3 | 8 |
| 12 in | 9 × 54 in | 2 | 5 | — |
| 12 in | 6 × 36 in | 4 | 2 | 6 |
| 16 in | 4 × 60 in | 2 | 2 | — |
Stores stock different lengths by region. Check availability before planning.
What is Sonotube Purchase Quantity Calculator?
A Sonotube Purchase Quantity Calculator is a shopping tool that estimates the whole tube forms to buy from a lumberyard or hardware store.
Volume calculators tell you concrete. This calculator tells you cardboard. Tubes come in fixed lengths, so 9 piers at 54 in need 5 tubes of 12 ft, not 4. A 4 ft tube cannot cover a 54 in pier, so the tool rules that size out.
The result is a shopping line: diameter, length and count.
What are the uses of Sonotube Purchase Quantity Calculator?
There are 4 main uses of the Sonotube Purchase Quantity Calculator.
Store orders
Owners buy the right number of tubes in one trip.
Length choice
Builders compare 4 ft and 12 ft tube counts.
Supplier quotes
Contractors list forms by diameter and length.
Spare planning
Crews add 1 tube for damaged ends.
🔗Related Sonotube Calculators
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Sonotube Cutting Planner
Plan your cuts so you waste less tube.
Sonotube Offcut Calculator
See how much tube you will have left.
Sonotube Volume Calculator
Find how much concrete fills a round tube.