How to use this calculator
Room dimensions use the selected unit. Tile dimensions are centimeters. The result rounds upward to whole tiles.
- Enter surface input, length, width and review the remaining options.
- Select Calculate or change a value to update the result. Read the result label and units before copying.
- Use Reset to restore the worked starting values.
Formula and method
Area-footprint estimate. Grout changes nominal coverage; borders, layouts, cuts and whole-box purchasing can change real quantities. Positive gap and negative overlap are explicit.
Worked example
20 m² with 30 × 30 cm tiles and 10% waste needs 245 tiles.
Questions about tile calculator
Does the tile count include grout gaps and layout cuts?
The estimate uses tile dimensions and the entered spacing to calculate coverage, applies waste, and rounds up to whole tiles and optional boxes. It is an area-based estimate, not a cut-by-cut layout optimizer. Allow for pattern cuts and confirm edge placement with the installer.
What assumptions should I check?
Area-footprint estimate. Grout changes nominal coverage; borders, layouts, cuts and whole-box purchasing can change real quantities. Positive gap and negative overlap are explicit.
Are my inputs saved?
Calculations run in your browser. We store only tool IDs for favorites and recent tools. A calculation link contains your inputs only when you explicitly choose to copy one.