This example shows typical entries for a small wall patch. Adjust costs and mortar factor to match your site conditions.
| Input | Example value | Notes |
|---|---|---|
| Method | Wall length × height | Measures gross wall area from dimensions. |
| Wall length | 6.0 m | Horizontal length of repair zone. |
| Wall height | 2.7 m | Vertical height of repair zone. |
| Openings area | 1.5 m² | Doors/windows excluded from repair. |
| Brick size | 215×102.5×65 mm | Common modular brick size. |
| Joint thickness | 10 mm | Bed and perp joint thickness. |
| Wastage | 7% | Covers breakage and cuts. |
| Mortar factor | 0.30 m³/1000 bricks | Planning factor varies by workmanship. |
| Brick cost | 25 | Currency as per your project. |
| Labor cost | 10 | Per brick replacement rate. |
- Gross wall area: either Area or Length × Height (converted to m²).
- Net repair area: A_net = A_gross − A_openings.
- Brick module face: (Face length + Joint) × (Brick height + Joint).
- Bricks per m²: N = 1 / (Module_length × Module_height).
- Bricks from area: Bricks_area = A_net × N.
- Wastage: Bricks_total = ceil(Base × (1 + Waste%/100)).
- Mortar volume: V_mortar = (Bricks_total/1000) × Mortar_factor.
If you enter a damaged brick count, the calculator uses that count as the base instead of area-based quantity.
- Select measurement method and units.
- Enter wall size (or wall area) and subtract total openings area.
- Confirm brick dimensions and mortar joint thickness for your bond face.
- Set a wastage allowance and, if available, your damaged brick count.
- Enter mortar factor, bag yield, and unit costs for a quick estimate.
- Press Calculate to view results above the form.
- Use the download buttons to export a report for records.
Practical Notes for Brick Replacement Planning
1) Quantities begin with measurable repair area
Reliable ordering starts by defining the repair boundary and measuring its gross area. This calculator accepts either wall length and height or a direct wall area entry. Openings are then deducted so the net repair area reflects only the brickwork being replaced. Use consistent units across site notes, drawings, and take‑offs.
2) Brick module size controls bricks per square meter
Bricks are counted using the “module” face: the selected brick face plus the mortar joint thickness. The calculator uses that module to estimate bricks per m², which is more accurate than using brick size alone. Choose stretcher or header face to match the visible face of the wall where replacement occurs.
3) Wastage protects schedule and appearance
Replacement work typically needs extra bricks for breakage, cutting around corners, color matching, and rejection of chipped units. A modest wastage allowance helps prevent stoppages while maintaining finish quality. Increase wastage for tight tolerances, special shapes, or difficult access that raises handling losses.
4) Mortar and cost estimates support early budgeting
Mortar volume is estimated using a planning factor in m³ per 1,000 bricks, then converted to bags using the product yield you enter. Costs are separated into brick, labor, mortar, and other lump sums such as disposal or scaffolding. Treat totals as screening values and confirm with specifications, crew rates, and supplier quotations before procurement.
FAQs
1) Should I use “wall area” or “length × height”?
Use wall area when drawings already provide it. Use length × height when you measure on site. Both produce the same result after unit conversion and opening deductions.
2) How do I handle doors and windows?
Add the combined area of all openings and enter it as openings area. The calculator subtracts it from gross wall area to get the net brickwork area to be repaired.
3) What does “stretcher” versus “header” change?
It changes the brick face length used in the module size. Stretcher uses brick length × height, while header uses brick width × height. Choose the face that represents the visible bonding pattern.
4) Why is mortar joint thickness included in counting?
Brick counts depend on the module (brick plus joint). Ignoring joint thickness usually underestimates bricks per m² and can cause a shortfall, especially for thicker joints or uneven existing work.
5) When should I enter “damaged bricks”?
Use it when you have a verified count from inspection. If provided, it overrides the area estimate and the calculator applies wastage to that count for a practical order quantity.
6) How should I pick the mortar factor and bag yield?
Use values from your mix design, product data sheet, or recent site records. Joint profile, workmanship, and wastage affect consumption, so adjust the factor when site trials indicate higher or lower usage.
7) What do the CSV and PDF exports contain?
They include the key inputs and calculated outputs used to produce the order quantity and cost estimate. Exports help document assumptions for approvals, purchase requests, and internal tracking.