How to Cut a Premade Quartz Countertop

Installing a premade quartz countertop can greatly upgrade the look and functionality of your kitchen. However, sometimes modifications are needed to properly fit the countertop to your space. Learning how to cut a quartz countertop allows you to customize it to your exact specifications. With the right tools and techniques, cutting quartz countertops is very doable as a DIY project.

Getting Started with Cutting Quartz Countertops

Cutting a quartz countertop requires careful planning and preparation. Here are some tips to get started:

  • Choose the right blade. You’ll need a diamond-grit blade designed for cutting stone. Look for one with a continuous rim instead of segmented. Go for a 4-5 inch diameter for control.
  • Mark your cut lines. Use a straightedge and sharp pencil. Mark along the entire cut path for accuracy.
  • Gather safety gear. Wear safety goggles, ear protection, gloves, and a N95 dust mask. The cutting process creates a lot of silica dust.
  • Work outdoors if possible. Cutting indoors will produce a lot of dust. Outdoors is better for ventilation. Lay a plywood platform over sawhorses.
  • Run water over the cut. Either use a partner to pour water, or rig up a hose to run over the cut line. This controls dust.

With the right prep, you’ll be ready to start cutting your quartz countertop.

Cutting a Straight Line in Quartz

For simple straight cuts like shortening the length or width of your countertop, follow these steps:

  • Position your circular saw on the marked cut line. Ensure the blade teeth rotate into the scrap side, not the piece you’re keeping.
  • Set the blade depth so it cuts just slightly deeper than the countertop thickness.
  • Have your partner pour a steady stream of water over the cut line during the entire cutting process.
  • Make several passes along the cut, lowering the blade slightly each time. Go slow and steady.
  • Check that the cut is complete by tapping along the cut line. Make additional passes if needed.
  • Once cut, smooth the edges with 120-150 grit sandpaper. Vacuum up all dust.

Making straight line cuts is relatively straightforward. The key is going slow and using ample water to control dust.

Cutting Out Spaces in Quartz for Sinks and Cooktops

Many quartz countertop installations require cutting out sections to accommodate sinks, cooktops, and other appliances. Here are some tips:

  • Trace the shape of the sink or appliance onto the countertop using a template.
  • Drill a starter hole inside the tracing. This gives the blade entry access.
  • Use a jigsaw with a diamond grit blade to cut out along the traced line. Go slowly and keep the blade cooled with water.
  • Make relief cuts at corners to allow the blade to turn smoothly. This prevents cracking.
  • Use 120-150 grit sandpaper to smooth cut edges. Carefully sand rounded inside corners.
  • Test fit the sink or appliance. Make any final adjustments needed with the jigsaw or sandpaper.

Cutting custom openings requires more precision but is very doable with a steady hand and the right tools. Take your time and don’t rush this part of the process.

Cutting Irregular Shapes and Curves in Quartz

For unique countertop designs, you may need to cut curves, angles, or other irregular shapes. Here are some techniques:

  • Draw the shape onto the quartz with a pencil. Make the lines dark and thick for visibility.
  • Use a jigsaw with an ultra-fine tooth blade to cut the shape. Move slowly and carefully.
  • Pour water over the blade constantly to prevent overheating and cracking.
  • At sharp angles, drill small starter holes so the blade can turn smoothly.
  • For broad curves, relieve the waste side occasionally so the blade won’t bind.
  • Use a band sander or sanding drum on a rotary tool for detailed sanding.
  • Smooth all cut edges carefully with 150-220 grit sandpaper.

Cutting irregular shapes takes practice. Invest in quality jigsaw blades and go slowly for the cleanest cuts in quartz. Test the fit often to ensure accuracy.

Tips for Getting Clean Cuts in Quartz

Follow these tips for making the cleanest cuts possible in your quartz countertop:

  • Ensure your circular saw or jigsaw blade is designed for stone and very sharp.
  • Change blades often. Dull teeth will chip and crack the quartz.
  • Cut with the finished side face down to reduce chipping on the visible edge.
  • Move slowly and steadily for the entire cut. Rushing causes mistakes.
  • Keep blades constantly cooled with water to prevent overheating.
  • For sinks, practice first on scrap pieces to master rounded corners.
  • Sand cut edges thoroughly with 120, 150, and 220 grit papers for a polished finish.
  • Vacuum dust frequently and wear a mask. Long-term silica exposure is dangerous.

Patience and the right tools are key to achieving clean, smooth cuts in quartz countertops. Take your time and don’t force the blades too quickly to avoid chipping.

FAQs About Cutting Quartz Countertops

Should I use a wet saw to cut quartz?

You can, but a good circular saw with a diamond blade also works well. The key is keeping the blade cooled and lubricated. Have a partner pour a steady stream of water over the cut for best results.

What speed should I cut quartz at?

Cut slowly, only a few inches per minute. Rushing the cut leads to cracking and chipping. Take your time for clean results.

How do I round the corners on a sink cutout?

Use a jigsaw with rounded bottom blades made for curves. Move slowly and carefully, relieving the waste side as needed. Finish with sandpaper.

What type of blade should be used?

Use a diamond-grit circular saw blade or jigsaw blade designed specifically for cutting stone materials. Segmented blades don’t work as well for quartz.

Is it okay to cut quartz outside?

Yes, cutting quartz outside is ideal to ventilate silica dust. Just be sure to sweep up all dust on the ground when finished for safety.

Can I cut quartz countertops with a handheld circular saw?

Yes, a good quality corded circular saw with a diamond blade designed for stone can cut quartz nicely. Keep it cooled with water and cut slowly.


With the right preparations and tools, DIYers can cut quartz countertops successfully. Mark all cut lines precisely, and work slowly with diamond-grit blades designed for stone. Keep blades constantly cooled with water to prevent cracking. For clean results, sand edges thoroughly and always vacuum dust. Patience and careful technique allows you to achieve a custom-fit quartz countertop installation.