What you need to know
- Measure every surface you plan to tile and subtract only openings that genuinely remove material.
- Convert tile dimensions to square metres or use stated box coverage.
- Add waste for cuts, breakage and pattern layout, then round up to full boxes.
Use your own measurements
BricoDato tools help turn the guide into quantities, kWh, cost or a project plan.
Calculate the surface area
For each rectangular surface, multiply width by height or length by width. Add the areas together and separate walls from floors if they use different products.
Convert the tile format
A 60 × 60 cm tile covers 0.36 m² before joints. In practice it is often easier to use the manufacturer’s stated box coverage and number of pieces per box.
Choose a waste allowance
Simple straight layouts often need less waste than diagonal patterns, small rooms with many cuts or designs that must be centred. Keep spare tiles from the same batch for future repairs.
Round to full boxes
The calculator should round the purchase up. Do not plan to buy a fraction of a box if the retailer sells only sealed packs.
Final check
Before buying material or doing the work, review the assumptions and technical limits that matter for your specific product, room or installation.
- Measure every tiled surface.
- Confirm box coverage and tile size.
- Allow more waste for complex layouts.
- Keep spare tiles from the same batch.
Keep a small job sheet
Record the measurements, product reference, technical values you used, date and final result. For maintenance or diagnostics, also note the conditions at the time. A short written record makes future comparisons much more reliable.
Turn the guide into a decision
Use your measurements and the manufacturer’s technical data. If the decision affects fixed electrical work, structure, hidden leaks, refrigerant systems or another safety-critical installation, consult a qualified professional.