How it works
Use the same units shown on each field. This area-based estimate ignores grout-joint width and assumes rectangular tiles. Layout, offcuts, pattern matching and damaged tiles can change the amount needed. Ten percent waste is a starting point, not a guarantee; ask your installer about complex or diagonal layouts.
The formulaTiles = round up [area × (1 + waste ÷ 100) ÷ tile area]
Tile area (sq ft) = length (in) × width (in) ÷ 144
Tile area (sq ft) = length (in) × width (in) ÷ 144