See how much is left after part of the pour.
⚙️Calculation Parameters
📊Calculated Output
How Sonotube Remaining Fill Calculator Works?
To find the remaining fill, the Sonotube Remaining Fill Calculator subtracts the concrete already placed from the total the tubes need. The process takes 4 steps.
Enter the project volume
Type the tube size and count, or the planned total in cubic feet (ft³) or cubic yards (yd³).
Enter what is placed
Type the volume poured so far, or the number of bags mixed and placed.
Subtract
The calculator removes the placed volume from the planned volume.
Read the shortfall
The tool shows the remaining ft³, yd³ and bags, rounded up to whole bags.
Sonotube Remaining Fill Calculator Formula
The Sonotube Remaining Fill Calculator subtracts placed volume from required volume.
Remaining volume
V_rem = V_total − V_placedBoth in ft³ or both in yd³.
Placed from bags
V_placed = bags placed × yield80 lb = 0.60 ft³ per bag.
Bags left
Bags = ⌈V_rem ÷ yield⌉Round up to a whole bag.
Worked example: 8 tubes at 12 in × 48 in, 30 bags of 80 lb placed
- V_total = 8 × 3.142 = 25.13 ft³
- V_placed = 30 × 0.60 = 18.00 ft³
- V_rem = 7.13 ft³, so mix 12 more bags of 80 lb concrete
Sonotube Remaining Fill Calculator Conversion Table
The remaining fill conversion table tracks a job of 8 tubes at 12 in × 48 in (25.13 ft³, 0.93 yd³) as 80 lb bags go in.
| Bags placed | Placed ft³ | Remaining ft³ | Remaining yd³ | Bags still needed |
|---|---|---|---|---|
| 0 bags | 0.00 | 25.13 | 0.931 | 42 |
| 10 bags | 6.00 | 19.13 | 0.709 | 32 |
| 20 bags | 12.00 | 13.13 | 0.486 | 22 |
| 30 bags | 18.00 | 7.13 | 0.264 | 12 |
| 40 bags | 24.00 | 1.13 | 0.042 | 2 |
| 50 bags | 30.00 | 0.00 | 0.000 | 0 |
Values use net volume with no waste. Add 1 or 2 bags, if holes run wider than the tubes.
What is Sonotube Remaining Fill Calculator?
A Sonotube Remaining Fill Calculator is a mid-pour tool that tells you how much concrete is still needed to finish filling your tubes.
Pours stop for many reasons: a mixer breaks, the day ends, or the bag pile runs out. The calculator answers the next question on the spot. A crew that planned 8 piers and placed 30 bags of 80 lb mix still needs 12 bags.
The tool accepts placed volume as bags, as cubic feet or as a list of completed tubes.
What are the uses of Sonotube Remaining Fill Calculator?
There are 4 main uses of the Sonotube Remaining Fill Calculator.
Second store run
DIY builders buy exactly the bags still needed.
Next-day pours
Crews plan day 2 of a pour split over 2 days.
Truck top-off orders
Contractors call a final small load from the plant.
Crew handoffs
Supervisors pass a clear remaining quantity to the next shift.
🔗Related Sonotube Calculators
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Available Concrete Fill Height Calculator
See how high your concrete will reach.