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Tiles Needed
Tile count for an area, with wastage.
Tiles needed
147
Area incl. wastage13.2 m2
Tiles per m211.1
Formula
tiles = ceil(area x (1 + wastage) / tile area)
ceil(12 x 1.1 / 0.09) = 147
Add more wastage for diagonal lays, large-format tiles, or busy patterns.