How to Cut a Quartz Countertop for a Cooktop

Cutting a hole in your quartz countertop for a cooktop installation may seem daunting, but with proper planning and the right tools, it can be done successfully as a DIY project. Here is a step-by-step guide to cutting quartz for a cooktop.


Quartz countertops are popular in kitchens today for good reason – they are durable, stain-resistant, and come in a variety of colors and patterns. However, despite their hardness, quartz countertops can be cut with the right tools. Cutting out a section to install a cooktop requires careful measurement, steady hands, safety precautions, and patience. With time and care, a homemade quartz cooktop cutout can look nearly seamless.

Before You Begin Cutting

Purchase cooktop before cutting: It is crucial to purchase your cooktop before cutting the quartz so that you have the exact cooktop dimensions. Cooktops come in standard and custom sizes.

Get professional advice: Consult with a countertop installation company before attempting to cut the quartz yourself. They can provide expert guidance on tools, techniques, and safety precautions.

Protect floors and surfaces: Cutting quartz produces debris and dust. Lay tarps or plastic sheeting and tape down to protect floors, walls, and other surfaces.

Assemble tools: You will need a circular saw with a diamond blade, protective eyewear, respirator mask, and vacuum. Have isopropyl alcohol and a microfiber cloth to clean cut edges.

Use proper support: Cutting on a sturdy table or sawhorses is better than cutting on the installed countertop. Use C-clamps to secure the quartz during cutting.

How to Measure and Mark the Cutout Area

Precisely marking the cutout area is critical for a clean cutout.

  • Place the cooktop upside down on the countertop and trace its outer edges with a permanent marker.
  • Mark the corners so you can realign it precisely.
  • Mark inside the outline for the cutout, about 1/8″ from the edges of the cooktop. This gap allows for installation.
  • Double check all measurements before cutting. Measure twice, cut once!

Cutting the Quartz Countertop

Follow these steps for a smooth cutting process:

  • Make small starter holes – Drill a 1⁄4” hole at each corner mark inside the cutout outline. This gives the saw blade an entry point.
  • Cut outer edges – With the circular saw and diamond blade, begin at a starter hole and cut along the inside perimeter of the cutout outline. Take it slowly to keep the line straight.
  • Cut out center – Make relief cuts from the starter hole to the edges of the outline. Remove the cutout center section.
  • Check fit – Place cooktop into the cutout to test the fit. Use a manual tile nipper or diamond file to shave or smooth any tight spots.
  • Clean edges – Carefully wipe away debris with isopropyl alcohol and a microfiber cloth. Examine edges for sharp spots and smooth them with sandpaper.

Finishing the Installation

Once the quartz countertop cutout is completed cleanly, finish the cooktop installation following the manufacturer’s instructions. Here are some final tips:

  • Apply clear silicone caulk around the top edges of the cooktop to seal it.
  • Take careful measurements to ensure a minimal gap between the cooktop and countertop.
  • Make any necessary backsplashes, caulking, or other mods for a seamless look.
  • Use cooktop edge trim or metal strips if needed to get a polished appearance.

With good prep, tools, safety, and technique, a DIY quartz countertop cutout can be a weekend project that saves on professional installation fees. Patience and care will result in a cooktop cutout that looks like it was done by the experts.

FAQs about Cutting Quartz Countertops

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

You will need a circular saw with a diamond blade made for cutting natural stone. A carbide or multi-purpose blade cannot cut quartz cleanly. You will also need eye protection, respirator mask, gloves, painter’s tape, isopropyl alcohol, microfiber cloths, and a shop vacuum.

How can I get a clean cut in quartz?

Mark the outline precisely, cut slowly with a diamond circular saw, and use starter holes at the corners. Make relief cuts and remove the center piece carefully. Smooth edges with sandpaper or a diamond file. Clean debris thoroughly.

Should I cut quartz countertop before or after installation?

It is best to cut the countertop hole before installing the full countertop. Cutting quartz on sawhorses allows better control and avoids vibration.

What size diamond blade do I need?

Use at least a 4-1/2″ diamond blade on a circular saw. The blade diameter should be greater than the thickness of the quartz slab. A 4-1/2″ blade can cut through 1-1/4″ thick quartz.

Can I do this myself or do I need a pro?

With caution, you can cut your quartz countertop yourself, but getting guidance from a professional fabricator is wise. Hire a pro if you prefer not to do it.

How do I get a smooth finish around the cutout?

Check for rough edges and use a diamond file or handheld tile nipper to smooth them. Apply clear caulk around the top edges of the cooktop for a polished look.


Cutting a hole in quartz countertop for a cooktop can certainly be a DIY project. With attention to detail, the right cutting tools, and safety precautions, an attractive custom cutout can be achieved. Patience is required to get perfectly straight edges and a snug fit. Get advice from countertop pros, measure precisely, and clean up debris thoroughly. The result will be a gorgeous, seamless look that makes the effort worth it.