How to Cut a Hole in Quartz Countertop

Cutting a hole in a quartz countertop can seem daunting, but with the right tools and techniques, it can be done successfully. Quartz is an engineered stone made from natural quartz crystals and resin that creates a very durable surface. While quartz is incredibly strong, it can be cut and shaped with specialized tools. Follow this step-by-step guide to properly cut a hole in your quartz countertop for a sink or other fixture.

Determine the Location and Size of the Cutout

The first step is to determine where the hole needs to be cut. Refer to the sink or fixture specifications for the exact measurements. Mark the location on the countertop with a pencil. Use a ruler or template to outline the full size of the cutout. Make sure to double check your measurements – it’s better to take extra time measuring than to cut the hole in the wrong place.

When cutting the hole, make it 1/8″ larger than the sink overall dimensions. This will account for any variances and allow you to position the sink just right. Having a cutout slightly larger than the sink is better than having one too small.

Gather the Right Quartz Cutting Tools

Cutting a hole in a quartz countertop requires specialty diamond-tipped tools designed for cutting stone. The main tools you’ll need are:

  • Diamond-grit hole saw – Use a quartz-specific hole saw bit made for drill press or angle grinder. Choose the right size bit that matches your desired hole size.
  • Diamond cutoff wheels – These are used for straight cuts with an angle grinder. Get a few in case they wear down.
  • Diamond router bits – Special bits for cutting curves and edges freehand with a router. Carbide bits will not work.
  • Straight edge – Used as a guide for cutoff wheels to ensure straight cuts.
  • Angle grinder – Power tool to use with diamond cutoff wheels for straight cuts.
  • Power drill/drill press – For hole saw to cut main sink hole. A drill press achieves the best accuracy.
  • Eye protection – Goggles or safety glasses to prevent eye injury from debris.
  • Ear protection – Cutting quartz is very loud, so wear hearing protection.
  • Dust mask – For protection against quartz dust particles. Have proper ventilation.
  • Gloves – Protect your hands from the diamond grit. Leather gloves work best.

Getting the right safety gear and using the proper diamond-tipped cutting tools is crucial for cutting quartz successfully. Never try cutting quartz with regular steel bits or blades.

How to Cut the Quartz Countertop Hole

Once you have all the right equipment, follow these steps for cutting the hole:

Step 1 – Drill Pilot Hole

Using a standard drill bit on a regular drill, drill a pilot hole in the center of the outlined area. This pilot hole will allow the quartz hole saw bit to start without walking or slipping.

Step 2 – Cut the Main Hole with Hole Saw

Attach your diamond hole saw bit to the drill press or angle grinder. Lower it straight down into the pilot hole. Let the tool do the work using light pressure. Don’t force it. Cut halfway down, then flip the countertop over and cut from the other side to meet in the middle. This helps prevent chipping.

Step 3 – Clean Up and Smooth the Cut Edges

Examine the hole for any rough spots. Use the diamond router bit to smooth and round the cut edge. Make sure the sink or fixture will fit properly within the hole.

Step 4 – Cut Out Template Holes

If needed, use the diamond wheel cutters on an angle grinder to cut any adjacent template holes for faucets, soap dispensers, etc. Use a straight edge as a guide to ensure straight cuts.

Step 5 – Polish the Cut Edges

Finally, use a diamond polishing pad to buff and polish all cut edges. This will give the hole a nice finished look. Take your time and work around the entire perimeter.

Once all cuts are made cleanly and the edges polished, you can install the sink or fixture into the quartz countertop hole. Be very careful when positioning it to avoid damaging the countertop. Use caulk or adhesive sparingly to secure everything in place nicely.

Tips for Cutting Quartz Countertops

  • Always review the tool safety guides and wear appropriate protection.
  • Work slowly and let the diamond tools do the cutting. Don’t force anything.
  • Keep tools sharp. Replace worn diamond cutting wheels and bits.
  • Cut from both sides when possible to get the cleanest edge.
  • Support the countertop on a stable worktable, never attempt to cut a countertop while still installed.
  • Have someone help hold the countertop steady while cutting long straight sections.
  • Keep the countertop face down with protective padding to avoid scratching.
  • For clean results, make several light passes when polishing rather than applying heavy pressure.

Cutting quartz countertops requires the right approach, but with patience and the proper tools, you can get professional-looking results. Always exercise caution when operating power tools to avoid injury or damaging the countertop.

Frequently Asked Questions About Cutting Quartz Countertops

Can I cut a quartz countertop myself?

Yes, it’s possible to cut holes and openings in a quartz countertop yourself using specialized diamond-grit cutting tools. With the right equipment and proper technique, you can achieve clean, professional results. It’s an advanced DIY project that requires caution.

What tools do I need to cut a hole in quartz?

You need diamond-cut blades and bits, including a quartz hole saw, diamond router bit, diamond cutoff wheels, and an angle grinder or drill press. Never try to cut quartz with regular steel tools. Carbide tools will also damage quartz.

What safety gear should be used?

Always wear eye protection, ear protection, a dust mask, and gloves when cutting quartz. Proper ventilation is also a must due to the amount of dust produced. Never cut quartz countertops while they are installed.

Can I use a jigsaw to cut quartz?

No, you should never attempt to cut quartz with a jigsaw. The coarse, frictional motion and pressure from a jigsaw blade will likely crack and chip the quartz. Only use diamond-cut abrasive tools designed for use on stone.

How should I finish the cut edges?

Use a diamond polishing pad to buff and polish the cut edges around the hole. Take your time and work the pad around the entire perimeter for best results. This smoothes the edge and gives it a nice sheen.

What mistakes should be avoided?

Don’t cut freehand – always use a straight edge as a guide. Don’t force the tools, apply light even pressure. Don’t cut corners when purchasing proper diamond tools. Don’t cut near the sink area while the countertop is installed.


Cutting an opening or hole in a quartz countertop can allow you to install a sink, soap dispenser, or other fixture directly into your countertop. While an advanced DIY project, it is possible to get clean, professional results with the right tools and techniques. The key things to remember are using specialized diamond-cut bits and blades, taking safety precautions, working slowly, and finishing the cut edges smoothly. With care and patience, you can add custom holes to your quartz countertop.