how to work out how many square meters of tiles i need?
['Find the area of the room. Length x Width = Area. ... ', 'Find the area of a single tile in square feet. Add the width of the grout lines. ... ', 'Divide the area of the room by the area of a single tile.', 'Add 10% for waste. Consider adding up to 30% for intricate designs and larger tiles.', 'Round up.']