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Free Tile Calculator: Tiles and Boxes for a Room

Work out how many tiles and boxes to buy for a floor, with an allowance for cuts and breakage.

Room and tile

Tiles to buy
0
Boxes
Floor area
Area of one tile

Ask the shop for the number of tiles in a box, because it changes with the brand and size.

How the count is worked out

Tiles = floor area × (1 + extra %) ÷ area of one tile, rounded up. Boxes = tiles ÷ tiles in a box, rounded up.

Example: a 12 × 10 ft room is 120 sq ft, or 11.15 m². With 10% extra, that is 12.26 m². A 600 × 600 mm tile covers 0.36 m², so you need 35 tiles, or 9 boxes of 4.

Diagonal laying and rooms with many corners need more cuts, so use 15% or more. Buy from one batch, because the shade can vary, and keep a few spare tiles for repairs.

Questions people ask

How many tiles do I need for a room?
Divide the floor area by the area of one tile, add about 10% for cuts and breakage, and round up. A 12 × 10 ft room needs about 35 tiles of 600 × 600 mm.
How much extra should I buy?
About 10% for a simple room, and 15% or more for diagonal laying or a room with many corners. Keep some spare tiles for later repairs, because the same shade can be hard to find.
How many tiles are in a box?
It differs by brand and size. Many 600 × 600 mm boxes hold 4, but check with your shop and enter the number here.

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