Tile quantity calculator
Work out how many tiles to buy for a floor or wall from the area and tile size, with a cutting-waste allowance.
Result
Tiles required
How to use this calculator
- Measure the area to be tiled.
- Enter your tile's length and width in centimetres.
- Read the number of tiles to order.
Assumptions
- Does not account for grout line width — for most tile sizes this has a negligible effect on quantity.
- Assumes a standard grid layout; diagonal or herringbone layouts need a higher waste allowance.
Technical details: what the fields mean
- Area to tile
floorAreaM2 - Total area to be tiled, in square metres.
- Tile length
tileLengthCm - Tile length, in centimetres.
- Tile width
tileWidthCm - Tile width, in centimetres.
- Waste allowance
wastePercent - Extra tiles for cuts, breakages and pattern matching. 10% suits a simple layout; use 15–20% for diagonal layouts or large-format tiles.
Methodology
Tiles = (area × (1 + waste%)) ÷ tile area, where tile area = (length ÷ 100) × (width ÷ 100). Rounded up to a whole tile.
Worked example
10m² floor, 60cm × 60cm tiles, 10% waste
Inputs: floorAreaM2=10, tileLengthCm=60, tileWidthCm=60, wastePercent=10
Result: 31 tiles required
Practical guidance
- Buy tiles from the same batch number — shade can vary noticeably between production batches.
- For a diagonal layout, increase the waste allowance to 15–20% to cover the extra corner cuts.
Common mistakes
- Entering tile dimensions in millimetres instead of centimetres.
- Using a flat 10% waste allowance for a complex or diagonal layout, which usually needs more.
FAQs
How many 60x60cm tiles do I need for 10m²?
31 tiles, allowing the default 10% waste for cuts.
How much extra should I order for a diagonal tile layout?
15–20% waste is more realistic than the 10% default for a simple grid layout, due to the extra corner cuts.