Divide the area you want to cover in rectangular sections as pictured. Make all measurements in mm.We recommend to add a minimum of 10% wastage to your order. Select your wastage from the drop down menu. As a rule of thumb larger tiles and a more geometric look (e.g. the hexagon tiles that overlaps both horizontally and vertically) require a higher waste percentage.The calculator base the calculations on the tiles being applied in the direction as pictured of the single tile sheet. If you intend to position your tiles in the opposite direction, simply swap width with height.