Tile Calculator

Calculate how many tiles you need for your floor or wall project. Account for waste and see total tiles needed.

Tiles Needed is a straightforward area division: Room Length times Room Width gives the floor area in square feet, Tile Length times Tile Width (converted from inches) gives the area of a single tile, and dividing the first by the second — rounded up, since a partial tile still means buying a whole one — gives the raw tile count. Room Length and Room Width scale the result identically, since they're multiplied together the same way; a bigger tile has the opposite effect, shrinking Tiles Needed because more of the floor is covered per piece. Waste Percentage plays no role in Tiles Needed itself — it only enters the second output, Tiles to Buy, which multiplies the raw count by (1 + waste/100) and rounds up again. That two-step design means Tiles Needed always tells you the bare minimum for full floor coverage with zero cuts, while Tiles to Buy is the number to actually take to the store. The 10% default waste factor is a reasonable starting point for a simple rectangular room in a straight running-bond pattern; diagonal layouts, herringbone patterns, rooms with lots of jogs or fixtures, or larger tile formats with fewer usable cut pieces all justify pushing waste higher, often to 15-20%.