Free tool
How many tiles do I need?
Get a tile count and box total for a floor, walls or a kitchen splashback, with wastage built in.
Your room
Your product300×600mm tiles · 6/box (from tile size) · 10% wastageChange
From your tile size — tiles are sold by the m², about 1.1 m² a box. Check yours.
14 boxes (80 tiles)
- Floor area
- 13 m²
- × 10% wastage
- 14.3 m²
- ÷ 300×600 mm tile (0.18 m² each)
- 80 tiles
- ÷ 6 per box (~1.1 m² boxes)
- 14 boxes
about 4 tiles spare
How we work it out
- We work out the area to be tiled: the floor, the walls (all the way up or part way), or each wall of a splashback measured on its own. Doors and windows come off wall areas.
- A wastage allowance is added on top for cuts, breakages and awkward corners before we work out the tile count.
- Tile count is based on your tile's exact size in millimetres, converted to square metres per tile.
- The final count is rounded up to whole boxes as sold, since most suppliers only sell tiles by the box.
Frequently asked questions
How many tiles do I need per m²?
It depends entirely on tile size. A 300x300mm tile covers 0.09 m², so you'd need about 11 tiles per m² before wastage. A larger 600x600mm tile covers 0.36 m², so just under 3 per m². Enter your tile size above for an exact figure.
Do I need to add wastage for tiling?
Yes - 10% is a sensible default for a straightforward rectangular room. Complex layouts, diagonal patterns, small bathrooms with lots of cuts around fittings, or a first-time tiler should budget 15-20% to be safe.
How many tile boxes should I buy?
Always round up to the next whole box, then check the batch number matches across boxes - tile colour can vary slightly between production runs, which is much more noticeable if you have to buy a top-up box later.
Should I measure floor or wall area for tiles?
Floor tiling uses the plain floor area (length x width). Wall tiling uses the same wall-area calculation as paint, with standard doors and windows subtracted. If the tiles stop part way up, as in a lot of bathrooms, choose Part way up and enter the height from the floor.
How many tiles do I need for a kitchen splashback?
Measure each wall that gets tiles along its length, and the height from the worktop to where the tiles stop - 0.6 m is typical, or 0.45 m if the wall units come lower. A 2.4 m run at 0.6 m is 1.44 m², which with 10% wastage is 141 metro tiles of 75 x 150 mm, or 2 boxes. Choose Splashback above and add each wall separately, with its own height if the tiles go higher behind the hob.
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