Tile Calculator
Calculate the amount of tile needed for floors or a single wall. The calculator accounts for surface size, tile dimensions, grout width, layout pattern, openings, bathtub or screen area, cutting waste, pack quantity and adhesive.
Tile Calculator
Calculate the exact number of tiles needed for floors or walls, including waste, grout, and adhesive.
Measure from wall to wall
From one wall to another
If there is a built-in bathtub or fixed screen
Indicated on the package, e.g. 30×30 cm
For square tiles, same as length
Usually 2–5 mm for ceramic, 1–3 mm for porcelain
Indicated on the box; needed for pack calculation
If work experience is low, add 5–10%
What to review after tile planning
After tile layout and box count, the usual follow-up is wet-zone engineering and the connected bathroom planning decisions.
Why professionals choose this tile calculator
- Floor and wall modes. Different settings cover floor areas, single walls, windows, doors and fixed bathtub or screen zones.
- Accurate tile sizing. Tile length, width and grout width all affect the result and are included in the estimate.
- Layout-specific waste. Straight, diagonal, herringbone and brick patterns use different base waste assumptions.
- Packs and adhesive. The result goes beyond square footage and helps with purchasing boxes and adhesive.
Step-by-step tile calculation guide
- Choose the surface type: floor or wall.
- Enter the room or wall dimensions in meters.
- If needed, specify bathtub or screen area for floor calculations.
- Add tile size, grout width and tiles per pack.
- For wall mode, include windows and doors on that wall.
- Select the layout pattern and adjust additional waste if needed.
- Review the tile count, pack quantity and adhesive estimate.
Tip: if the room has many cuts or you are new to tiling, add an extra 5–10% on top of the automatic waste allowance.
Common calculation mistakes
Underestimating edge cuts. A neat rectangle on paper still turns into real cuts around corners, boxes, niches and plumbing on site.
Ignoring tile format and pattern. Large-format tile, diagonals and directional patterns all increase waste and should never be treated like a simple grid.
Mixing floor and wall logic. Floors and walls need different deductions and assumptions. Running them as one surface usually distorts both box count and adhesive use.
What to check before buying
Verify caliber and shade. Boxes from the same collection can still vary slightly. Matching the batch before installation saves a lot of frustration.
Double-check pieces per box and adhesive rate. The final order depends on the actual packaging and on how thick the adhesive bed will be on your substrate.
Keep spare tiles for repairs. A small reserve from the same batch is much easier to store now than to source months later.
Tile calculation FAQs
How do I estimate the right number of tiles?
Enter accurate dimensions, tile size, grout width and layout pattern. The calculator then adds waste and gives you a practical result in tiles, packs and adhesive.
How much waste should I allow?
Straight layouts usually need about 10%, diagonal layouts around 15% and herringbone around 20%. Complex rooms may need a bit more.
Why should I enter grout width?
Grout width changes the effective coverage of each tile and improves the accuracy of the estimate.
Should I subtract bathtub or screen area?
Yes. If tile is not installed on part of the floor because of a built-in bathtub or fixed screen, it should be excluded from the floor estimate.
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