Input Rows
Add tubes with mixed units; results aggregate automatically.
| # | Unit System | Diameter | Height | Count | Actions |
|---|
Metric rows use mm for diameter and m for height. Imperial rows use in and ft.
Bag Yield Presets
Adjust yields to match supplier datasheets.
Totals & Bags
Total volume (m³)0.000
Total volume (ft³)0.000
Total volume (yd³)0.000
Waste / Overage applied5%
25 kg bags (m³ yield)0
40 kg bags (m³ yield)0
60 lb bags (ft³ yield)0
80 lb bags (ft³ yield)0
Bags are rounded up to whole bags.
Results by Row
| # | Unit | Diameter | Height | Count | m³ | ft³ | yd³ |
|---|---|---|---|---|---|---|---|
| No results yet. Click Calculate. | |||||||
Example Data
| Unit | Diameter | Height | Count | Volume per tube (m³) | Volume per tube (ft³) | Volume per tube (yd³) |
|---|---|---|---|---|---|---|
| Imperial | 12 in | 4 ft | 1 | 0.0890 | 3.1416 | 0.1163 |
| Imperial | 18 in | 6 ft | 1 | 0.3004 | 10.6029 | 0.3927 |
| Metric | 300 mm | 2.5 m | 1 | 0.1767 | 6.2400 | 0.2311 |
These are reference values for single tubes; totals depend on count and waste.
Formula Used
The concrete volume for a cylindrical tube is V = π × r² × h.
- Metric rows: radius
r = (diameter_mm / 1000) / 2, height in meters. - Imperial rows: radius
r = (diameter_in / 12) / 2, height in feet; convert to cubic meters with1 m³ = 35.3147 ft³. - Project totals multiply by count and include waste / overage.
- Bag counts divide total volume by the selected bag yield, rounding up.
How to Use This Calculator
- Click Add Row for each tube size on your project.
- Choose Metric or Imperial per row, then enter dimensions.
- Set Count per tube size, and adjust waste percentage if required.
- Update Bag Yield Presets from supplier datasheets if they differ.
- Click Calculate to see per‑row volumes, totals, and bag counts.
- Use Download CSV or Download PDF for records and purchase orders.
- Save the file; re‑open later and reuse your typical presets.
FAQs
Yes. Datasheets list yield per bag based on mix design and water. Adjust the presets to match your supplier for better ordering accuracy.
Typically 5–10% covers spillage, voids, bulking, and placement losses. Site conditions, crew experience, and consolidation methods can require different allowances.
Yes. Each row sets its own unit system. The calculator converts and totals consistently in cubic meters, cubic feet, and cubic yards.
Counts are rounded up to whole bags. For ready‑mix deliveries, use total volumes directly and confirm with your supplier’s dispatch team.
Yes, slightly. Water content, admixtures, and aggregate gradation change density and yield. Bagged product yields are averaged estimates under standard conditions.
This tool focuses on concrete volume. Add reinforcement per project drawings or local code and coordinate bar schedules separately.
Use the PDF export for a formatted summary with rows, totals, and bag counts. You can also print the page using your browser’s print function.