About this tool
Compute the number of square tiles needed to cover a rectangular floor. Add a waste percentage (default 10 %) to account for cuts and breakage.
Formula
tiles = ceil((roomArea_sqin / tileArea_sqin) × (1 + waste/100))
Worked example
12 × 10 ft room, 12-inch tiles, 10 % waste → ceil(120 × 1.10) = 132 tiles.
Notes
Diagonal layouts and tight rooms often need 15–20 % waste. Rectangular tiles need a different formula based on orientation.