If you have a look at our wall tiles, you'll see their description provides both a square metre cost and if sold in a carton how many square meters it covers. Work out your room's square meterage to see how many cartons you'll need. Remember you can measure the box of the room and then minus doorways and windows to get close to the mark. You can always return unused tile cartons after you finish the project. - MitchellMc
How to calculate for tiling quantity:
Let’s use an example. If the floor area is 2130 W and is 2800 L multiply these two amounts to get your floor area in square meters.
2.130 x 2.800 = 5.964 (let’s round it up to 6 square meters to simplify)
6 meters divided by the coverage area of 1 box of tiles. One carton of 600 x 600 tiles will cover 1.08 square meters
6 / 1.08 = 5.55 ( to round up you will need 6 boxes to cover the area and you have extra should errors occur ) - redracer01