Calculator
Enter wall and reinforcement details. The tool estimates grout/concrete volume, block count, and rebar quantities for a continuous bond beam run.
Example Data Table
This example illustrates a 40 ft run with one U-block course.
| Parameter | Example |
|---|---|
| Wall length (ft) | 40.000 |
| Beam width (in) | 8.000 |
| Beam height (in) | 8.000 |
| Bond beam courses | 1.000 |
| Fill factor | 0.850 |
| Waste (%) | 5.000 |
| Block length (in) | 16.000 |
| Bag yield (ft^3/bag) | 0.500 |
| Bars count | 2.000 |
| Bar size | #5 |
| Stock length (ft) | 20.000 |
| Lap length (ft) | 2.000 |
| End hook (ft) | 1.000 |
| Output | Result |
|---|---|
| Grout/Concrete volume (ft^3) | 15.111 |
| Grout/Concrete volume (yd^3) | 0.560 |
| Estimated bags (qty) | 30 |
| Bond beam blocks with waste (qty) | 32 |
| Rebar purchased length with waste (ft) | 126.000 |
| Rebar weight with waste (lb) | 131.418 |
Formula Used
- Bond beam volume: V = L x W x H x Courses x FillFactor. Dimensions are converted to consistent units before computing.
- Blocks per course: Blocks = ceil(Length / BlockLength); totals multiply by course count, then waste is applied.
- Rebar purchased length: the tool estimates pieces per bar using stock length and lap length. Purchased length is Bars x PiecesPerBar x StockLength, then waste is applied.
- Rebar weight: weight = purchased length x unit weight (lb/ft for imperial, or d^2/162 kg/m for metric).
- Costs (optional): grout cost = volume x unit cost, steel cost = weight x unit cost. Total cost is the sum.
How to Use This Calculator
- Select your unit system, then enter the wall length and course count.
- Set beam width and height to match the bond beam detail.
- Use a realistic fill factor for U-block cavities and grout loss.
- Enter reinforcing details: bar size, stock length, lap, and end allowance.
- Optionally add unit costs to estimate budget impact.
- Click Calculate to show results above the form.
- Use Download CSV or Download PDF to export.
Notes: This tool supports estimating continuous bond beams. For engineered design, always follow project drawings, codes, and inspection requirements.