Concrete Planner
All fields use the selected units.
%
Extra to cover spillage, voids, over-excavation.
Affects bag yields and alternatives list.
For note only; bag count is volumetric.
Segments
| Shape | Dim A ft | Dim B ft | Dim C in | Count | Volume (ft³) |
|---|
Results
- Total volume (ft³)
- 0.000
- Total volume (yd³)
- 0.000
- Total volume (m³)
- 0.000
- Waste applied
- 5%
- Selected bag size
- 60 lb
- Bags required (selected)
- 0
- Total bagged weight
- 0 lb
- Pallets (approx.)
- 0
- Fresh concrete weight
- 0 lb
Alternative bag counts
Based on current brand yields.
Example Data Table
| Shape | Dim A | Dim B | Dim C | Count | Volume (ft³) |
|---|---|---|---|---|---|
| Rectangle slab | 12 ft | 10 ft | 4 in | 1 | 40.00 |
| Post hole | 10 in dia | 2.5 ft depth | — | 4 | 5.45 |
| Beam/Footing | 20 ft | 2 ft | 6 in | 1 | 20.00 |
| Total | 65.45 ft³ | ||||
Tip: Click Presets or Load example to add similar rows.
Formula Used
- Rectangle slab:
V = L × W × T - Beam/Footing:
V = L × W × H - Circular slab:
V = π × (D/2)² × T - Post hole:
V = π × (D/2)² × depth × count - Waste:
Vnet = V × (1 + waste%) - Units: 27 ft³ = 1 yd³; 1 m³ = 35.3147 ft³
- Bag count:
bags = ceil( Vnet / yieldbag ) - Approx. fresh concrete weight:
150 lb/ft³(≈ 2400 kg/m³)
Note: Library yields are typical; verify with product datasheets for accuracy.
How to Use
- Select Units, choose a Brand / Yield Library, and set a Waste Allowance.
- Choose a Bag Size or set a Custom yield.
- Add Segments manually, via Load example, or from Presets.
- Click Calculate to see volumes, bag counts, pallets, and weights.
- Save your project locally, or Export/Import JSON to share.
FAQs
Yes. Published yields vary with aggregate grading and cement content. Select a library and adjust if needed to match your product sheet.
5–10% is common for small pours. Increase for irregular excavations, difficult access, or hot, windy conditions that increase losses.
No. Bag count depends on volume and bag yield. Strength helps choose the right product grade but doesn’t change volume.
Yes, but track yields. The Alternative bag counts list helps estimate equivalents if inventory varies.
Projects save to your browser’s localStorage on this device. Export JSON to move between devices or share with teammates.