Tile Calculator
Calculate the number of tiles your floor needs, including a waste allowance.
m²
cm
cm
%
Tiles needed
245tiles
Area per tile
0.09 m²
With waste
244.4
Formula
Tile area = (Width ÷ 100) × (Height ÷ 100) • Tiles = ⌈Floor area ÷ Tile area × (1 + Waste ÷ 100)⌉
About this calculator
To tile a floor, divide the room area by the area of a single tile to get the base count, then add a waste allowance for cuts, off-cuts and breakages. Tile dimensions are entered in centimetres and converted to square metres, so a 30 × 30 cm tile covers 0.09 m². The result is rounded up because you cannot buy a fraction of a tile.
Frequently asked questions
Around 10% for a simple straight layout. Allow 15% or more for diagonal patterns, busy room shapes or large-format tiles.
You can only buy whole tiles, so any fractional requirement is rounded up to ensure you have enough to finish.
Enter tile width and height in centimetres; the calculator converts them to square metres to match the floor area.
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