Inputs
m
m
m²
Sum windows/doors area to subtract from wall area.
m²
If set, width/height and openings are ignored.
mm
mm
mm
mm
mm
g/cm³
Typical sanded grout ~1.8–2.0 g/cm³.
%
%
%
kg
kg
Results
Net wall area
0.00 m²
Brick slips required (incl. waste)
0 pcs
Adhesive total
0.00 kg | 0 bags
Grout total
0.00 kg | 0 bags
| Metric | Value | Unit |
|---|---|---|
| Net area | 0.00 | m² |
| Pieces per m² | 0.00 | pcs/m² |
| Base slips (no waste) | 0 | pcs |
| Waste on slips | 0 | pcs |
| Adhesive coverage used | 0.00 | kg/m² |
| Adhesive total | 0.00 | kg |
| Grout kg per m² | 0.00 | kg/m² |
| Grout total | 0.00 | kg |
Example Data Table
Sample scenarios for quick reference. Click Recalculate rows to update outputs using current formulas.
| Area (m²) | Slip L×H (mm) | Joint (mm) | Depth (mm) | Coverage (kg/m²) | Adhesive (kg) | Grout (kg) | Slips (pcs) |
|---|---|---|---|---|---|---|---|
| 10 | 215×65 | 10 | 10 | 5.0 | |||
| 25 | 240×52 | 8 | 10 | 4.0 | |||
| 40 | 200×70 | 12 | 12 | 6.0 |
Formulas Used
- Net wall area = direct area, or
width × height − openings. - Pieces per m² ≈
1 / ((L + g)·(H + g))using meters. L,H = slip length/height; g = joint width. - Base slips =
area × pieces_per_m²; final slips adds waste and rounds up. - Adhesive total =
area × coverage(kg/m²) then + waste. - Grout per m² ≈
((L + H)/(L·H)) × g × d × ρwith L,H,g,d in mm and ρ in g/cm³. - Grout total =
area × grout_per_m²then + waste.
These are industry-standard approximations. Always verify against product datasheets.
How to Use
- Choose units, then enter wall geometry or total area.
- Enter slip dimensions, joint width and depth. Depth ≈ slip thickness.
- Select trowel notch or type a custom coverage value.
- Set waste percentages and bag sizes to match suppliers.
- Click Calculate to see totals and bags required.
- Export results as CSV or PDF for your project record.
FAQs
Thin, flat substrates and thinner slips often work with 6–8 mm notches. Uneven surfaces or heavier slips may need 10–12 mm. Always follow the adhesive brand’s guidance.
It uses a standard tile/brick slip approximation based on joint geometry and density. Variations in pointing style and void ratio can change actual consumption.
Yes. Toggle units at the top. The calculator converts internally and reports in the chosen system.
Many projects use 5–10% for slips, ~10% for adhesive, and ~5–10% for grout. Increase waste for complex cuts and tight patterns.
Totals are divided by your bag sizes and rounded up. Adjust bag size to match your supplier’s packaging catalog.
When required by the adhesive manufacturer or for uneven backs, back-buttering improves contact and can increase adhesive usage slightly.