Cutting porcelain tile is something that you can do yourself to save money. You can cut your tiles with only a little practice. You can buy a tile cutter at any home improvement store. A simple, hand operated tile cutter will work. You can also purchase motorized tiles cutters for this job.
Step 1 - Tile Placement
Place the tile cutter on a sturdy surface in front of you. Put the porcelain tile against the tile stop at the end of the cutter. Ensure that the pressure is distributed evenly so that you cut a straight line.
Step 2 - Cutting the Tile
Place the blade on the tile edge closest to you. Press the lever down and then roll the blade to the other end of the cutter. One final push down will ensure that the cut goes through to the end of the tile. The key to cutting porcelain tile without chipping it is not to use too much force. People think you need to press down hard, but just a little pressure should do the trick. The gentle pressure will avoid tile damage.
Source: www.DoItYourself.com
