Tiling calculator
Calculate the tiles and boxes to buy for a floor or wall: the area, the tile size and the cutting margin (10 % for a straight lay, 15 % for a diagonal) — plus the spare for future breakage. Buying the exact number and then losing one tile is the classic tiling surprise. A quantity is a private figure, computed on your device.
- 100% local
- Free · no account
- Instant result
This tool runs entirely in your browser — nothing is sent to a server.
To tile a room, dividing the surface by the tile size is not enough: edge cuts, breakage and adjustments require a margin, generally 10 % for a straight layout and 15 % for a diagonal layout or an irregular room.
This calculator converts your surface and the chosen tile format into the number of tiles and square metres to order, margin included — and into the number of boxes if you give the contents. Always keep a few extra tiles: colour batches differ from one lot to another.
How it works
Type the figures or drop the file you want to process — the tool checks them as you go.
Everything is computed directly in your browser. Nothing is sent to a server.
The result appears instantly, with the detailed breakdown ready to copy, download or keep.
Why use this tool
No account, no download, no limit: the result appears as soon as you enter your data.
Every rule, algorithm and check reflects what we use ourselves every day at Flexina.
The calculations follow the official standards, and the step-by-step detail lets you double-check the outcome.
What does running it locally bring you?
Files, figures and documents never leave your device: nothing is stored, nothing is sent.
Once the page is loaded, you can cut the network: the tool keeps working.
No upload, no account, no third-party server in between: results stay fast and fully private.
Frequently asked questions
What cut margin should I choose?
10 % for a classic straight layout, 15 % for diagonal, large formats or a room with irregular walls. For a matching-pattern design, follow the manufacturer’s recommendation.
How do I calculate the floor surface?
Length × width of the room, in metres. For an L-shaped room, split it into rectangles and add them. Do not deduct small obstacles (fixed furniture not covered by tiling aside).
Why keep extra tiles?
If a tile is broken or stained years later, the same model will probably be gone or have a different colour batch. Half a box of extras avoids redoing the whole room.