Tile calculator
Find out exactly how many tiles you need for floors, walls, or backsplashes. Enter surface dimensions and tile size — we'll account for grout joints and waste.
Inputs
Room size
Tile size
Results
Room area
Enter your measurements to see the result
square metres (m²)
Tiles (with 10% waste)
—
pcs
Boxes (10 tiles/box)
—
boxes
Net tiles
—
pcs (no waste)
Tile area
—
cm²/tile
⚠ Floor tiling — default 10% waste (floor tiling is mostly straight cuts along the perimeter). Add 10–15% more on top for herringbone or diagonal patterns.
Frequently asked questions
How many tiles do I need for a room?
Divide your room area by the area of a single tile (including the grout joint). For example, a 12 m² room with 60×60cm tiles needs about 33 tiles before adding waste allowance.
How much extra tile should I buy for waste?
Add 10% extra for straight-laid tiles, and 15% for diagonal, herringbone, or patterned layouts to account for cuts and breakage.
What size grout joint should I use?
Size the joint from the tile you bought. ANSI A108.02 requires the joint to be at least three times the size variation between tiles, and never less than 1/16 inch (1.6 mm). For offset layouts of tile longer than 15 inches, the average joint must be at least 1/8 inch (3.2 mm) for rectified tile and 3/16 inch (4.8 mm) for calibrated tile. The calculator defaults (3 mm floor, 2 mm wall) are only starting points.
How many tiles come in a box?
Box quantities vary by manufacturer and tile size, but 10 tiles per box is common for medium-format floor tiles. Always check the specific product packaging.