Both a standard circular saw (7 1/2-inch blade) or angle grinder (4 1/2-inch blade) make clean, easy cuts and involve similar techniques. In either case, be sure to use a diamond blade made for masonry and stone. It's best to set the paver on a non-slip mat (such as rubbery all-purpose grip mat) to help hold it in place during cutting. You can also clamp the paver to your work surface, if desired.
Mark the cutting line across the top face of the paver, using a pencil and a square or straightedge. Transfer the line to the bottom face of the paver.
Place the paver onto a non-slip mat atop your work surface. Adjust the saw blade to cut a shallow depth (1/8-1/4 inch), if using a circular saw.
Cut along the marked line, starting with a shallow cut at the surface, then make several passes, adjusting the depth of the saw with each pass until you reach a depth of about 1/2 to 1 inch.
Flip the paver over and repeat the same cutting process on the bottom face.
Set the paver flat on your work surface, and gently but firmly, tap the waste portion of the paver with a hammer to break the paver along the cutting line.
A wet saw makes a clean cut all the way through a paver. Saws that are capable of cutting pavers are simply large versions of the wet saws you can rent for cutting ceramic tile. Water sprays onto the blade during the cut to minimize heat and dust.
Mark the cutting line on the top face of the paver, using a pencil and a square or straightedge.
Place the paver on the saw sled, making sure it is resting fully against the back lip of the sled. Line up the paver's cutting line with the saw blade, then slide the sled all the way back.
Turn on the saw and let it come up to full speed. Water should flow over the blade whenever the saw is running.
Hold the paver firmly against the sled, keeping your hands well away from the saw blade. Push the sled slowly and steadily toward the blade until the blade cuts through the paver.
Slide the sled back, remove the paver pieces, and turn off the saw.
Sometimes called a guillotine, a brick splitter is a non-power tool that operates somewhat like a log splitter—except that it cuts bricks and pavers. It is sometimes preferred over other methods because it produces no dust and is much quieter than a power saw. If you're cutting concrete pavers, which tend to be harder than brick, make sure the splitter you rent is designed for concrete. Brick splitters typically do not work with stone pavers.
Mark the cutting line on the top face of the paver, using a pencil and a square or straightedge.
Position the paver on the base of the tool so the marked line is aligned with the splitter's cutting edge.
Pull down sharply on the handle of the tool to split the paver.
If your layout calls for relatively few cut pavers, you can do this work with a masonry chisel and hammer.
Mark the cutting line across the top face of the paver, using a pencil and a square or straightedge. Transfer the line to the remaining three sides of the paver.
Carefully tap the chisel with the hammer to cut a shallow groove (about 1/8 inch deep) along the cutting line on all four sides of the paver. Do not strike too hard, or the paver may break irregularly.
Set the paver face-up on a flat, sturdy surface. Position the chisel edge into the groove at the center of the paver face. Hit the chisel sharply with the hammer to break the paver along the grooved line.