Find out how many tiles you need for your room based on room size, tile size, and a waste allowance for cuts.
Enter your room's length and width, the size of the individual tiles you plan to use, and a waste percentage to account for cuts and breakage. Optionally enter a price per tile to estimate total material cost. Click "Calculate Tiles Needed" to see your results.
Room area = room length × room width. Area per tile is calculated in square feet from the tile's dimensions in inches (length × width ÷ 144). Tiles needed = ceiling of [(room area ÷ tile area) × (1 + waste%)].
A 12 ft by 10 ft room (120 sq ft) tiled with 12-inch by 12-inch tiles (1 sq ft each) and a 10% waste allowance needs about 132 tiles. At $2.50 per tile, that comes to roughly $330 in materials.
How much waste allowance should I use? A standard straight-lay pattern typically needs about 10%, while diagonal layouts or rooms with many corners and cuts often need 15-20%.
Does this include grout or adhesive? No, this calculator estimates tile quantity and cost only; grout and adhesive coverage vary by product, so check the manufacturer's coverage chart separately.
Total area divided by a single tile's area, plus a waste allowance (typically 10%).
Larger tiles are harder to cut efficiently around odd angles.
Slightly — wider grout lines mean fewer tiles needed for the same area.