About the Tile Calculator
Tiles, adhesive and grout for a floor or wall, with cutting waste and box counts.
Also known as: how many tiles do i need, tile quantity calculator, floor tile calculator, wall tile calculator, tiles per square meter.
How to use this calculator
- Enter tiling a, length, width or height, openings to deduct and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
tiles = area ÷ ((tile length + joint) × (tile width + joint))
Worked example
Using the values pre-filled in the calculator above:
- Tiling a: Floor
- Length = 4 m
- Width or height = 3 m
- Openings to deduct = 0 m²
- Tile size: 600 × 600 mm
- Grout joint = 3 mm
- Cutting waste = 10 %
- Tiles per box = 4
the calculator returns:
- Tiles required: 37
- Boxes to buy: 10
- Tiles per m²: 2.75
- Area to tile: 12 m²