Tiling Waste Calculator
Enter room length/width and tile size to estimate tile count by actual row/column layout (including edge-cut waste), more accurate than area method, for purchasing.
Input Data
Results
At a glance:By row/column layout: tiles per row = ⌈room length(mm) ÷ tile length⌉, per column = ⌈room width(mm) ÷ tile width⌉, total tiles = rows × columns, already including half-tile edge cuts. Multiply by (1 + extra waste%) and round up for purchasing. This is more accurate than "area ÷ tile area", which underestimates edge cuts. Diagonal, herringbone and pattern layouts have higher waste (10–20%).
Formula
Rows = ⌈length×1000 / tile length⌉
Columns = ⌈width×1000 / tile width⌉
Tiles = ⌈rows × columns × (1 + extra waste%)⌉
$$r = \left\lceil \frac{L\cdot1000}{w} \right\rceil$$$$c = \left\lceil \frac{W\cdot1000}{h} \right\rceil$$$$N = \left\lceil r c (1+p) \right\rceil$$How to Use
- Enter the room length and width (m).
- Enter the tile length/width (mm).
- Set the extra waste (higher for diagonal/pattern).
- The tool outputs rows, columns and tiles needed.
Case Studies
Living room floor tiles
4×3 m, 600×600, extra 5%.
7 rows, 6 columns; 42×1.05 ≈ 45 tiles.
Diagonal wall tiles
3×2.5 m, 300×600, extra 15%.
10 rows, 5 columns; 50×1.15 ≈ 58 tiles.
FAQ
Why more than the area method?
The layout method counts the cut piece at every edge; the area method assumes seamless tiling and underestimates.
Why is diagonal layout wasteful?
Diagonal tiles need all four corners cut, waste can reach 10–20%, so set extra waste higher.
Related Tools
References
Content review: Calculatorism Construction Team. Results are for reference only; please refer to the relevant authorities for the official figures.