To determine how many tiles you need for a specific project in square meters, you will need to measure the area that you plan to tile and calculate the total square footage. You will also need to consider the size of the tiles you plan to use, as well as any cuts or waste that may be generated during the installation process.

Here is a general formula you can use to calculate the number of tiles you will need in square meters:

(Area to be tiled in square meters / Size of tiles in square meters) + 10% (for cuts and waste) = Number of tiles needed

For example, if you are tiling a backsplash that measures 1.2 meters by 0.6 meters (0.72 square meters) and you are using 100mm by 100mm tiles (0.01 square meters each), you will need the following number of tiles:

(0.72 square meters / 0.01 square meters) + 10% = 72 tiles + 7.2 tiles (for cuts and waste) = 79.2 tiles

Keep in mind that this is just a rough estimate, and you may need to make adjustments based on the specific details of your project. It is always a good idea to order a few extra tiles to have on hand in case of any mistakes or breakage during the installation process.