How to Cut Countertop Quartz

Installing a quartz countertop can greatly improve the look and feel of your kitchen or bathroom. Quartz is an engineered stone made from crushed quartz, resins, and pigments that is molded into slabs. It is an attractive, durable, and low-maintenance material. When installing a quartz countertop, you will likely need to cut and shape sections to properly fit your space. With the right tools and techniques, cutting quartz countertops is a manageable DIY project.

Gather the Necessary Materials

Cutting quartz countertops requires using specific tools to make clean, precise cuts without damaging the material. Here is the equipment you will need:

  • Quartz countertop slab
  • Tape measure
  • Marker or pencil
  • Straightedge
  • Electric or pneumatic angle grinder
  • Diamond blade made for cutting stone
  • Water source
  • Eye and ear protection
  • Dust mask
  • Gloves

Make sure you have a sturdy work table that can support the weight of the slab. Prepare the workspace by removing any objects or debris that could get in the way.

Measure and Mark the Countertop

First, take detailed measurements of the space where the countertop will be installed. Measure the length and width of the countertop area. For sections that will go against a wall, measure the length where the countertop meets the wall, taking into account any corners or angles. Transfer these measurements to the quartz slab and use a marker or pencil to mark your cut lines.

Double check all measurements before marking to ensure accuracy. It helps to have someone assist with holding the straightedge while you mark. Make straight, confident lines using a straightedge. Mark a few inches longer than the actual cut to leave room for error.

Set Up Proper Cutting Equipment

Cutting quartz produces a lot of dust, so you’ll want to limit dust inhalation as much as possible. Wear a protective dust mask and eye protection whenever operating the grinder. Wear ear protection to guard against loud noise. Use thick, durable gloves when handling the slab.

Ensure your work area is clear to allow plenty of room for cutting. Set up the slab on a flat work table and secure it so it won’t shift while cutting. Clamp down a straightedge along your cut line so the blade will follow your marked cutting line.

An angle grinder with a diamond blade specifically made for cutting stone works best to cut quartz slabs. The diamond edges stay sharp for clean cuts through the thick quartz material. Connect the grinder to a water source which will help suppress some of the dust produced while cutting.

Make Straight Cuts Following the Cut Lines

With safety gear on, water running, and your cut line prepped, you can start cutting. Hold the grinder firmly with both hands maintaining full control. Hold blade straight and flat against the quartz. Allow the diamond blade to cut slowly through the quartz without forcing it.

Apply light, consistent pressure and guide the grinder steadily along the cut line. Don’t rush the cut or force the blade. The blade should do the work as it cuts through the quartz. Stay focused to keep your cut straight and accurate.

For longer cuts, stop periodically to verify you are still following the marked line. Make minor adjustments to realign with the cut line if needed. Avoid twisting or turning off the cut line for the cleanest cuts. Continue guiding the blade from start to finish until the cut is complete.

Make Curved and Irregular Cuts

For curved countertop edges or cutouts around sinks, the cutting technique is essentially the same. Outline the curved shapes with a marker using a template made of thin material that flexes. Cut just outside the line with the grinder in smooth arcs following your outline.

Interior cutouts can be a bit trickier. Use the grinder to make relief cuts just inside the corners of the cutout shape. Carefully tap along the cutline with a hammer and chisel to finish freeing the cutout shape. Clean up rough edges with the grinder.

Work slowly and patiently for irregular curved or interior cuts. Mark lines carefully and double check measurements for accuracy. Relief cuts and gentler hammer and chisel use can help control cracking. Finishing with the grinder leaves smooth edges.

Observe Safety Precautions When Cutting

Cutting quartz produces a dusty work environment. Wear a respirator and eye protection at all times when operating the grinder. Keep water running on the blade which helps minimize airborne dust. Have a vacuum ready to contain dust.

Wear ear protection as cutting quartz can be quite loud. Quartz has a hard, brittle makeup and cutting blades can snap shards off the slab. Wear thick gloves when handling pieces to avoid sharp edges. Keep your work area clear of debris and wipe any water accumulation to avoid slips or falls.

Go slowly with blades, applying light, steady pressure rather than force. The diamond edges are sharp enough to cut quartz without excessive speed or force. Avoid awkward hand positions and maintain good balance in case the blade jumps. Keep full control of the running grinder for safe operation.

Observe common sense safety practices, take your time, and maintain proper tool handling. Careful preparation, marking, and cutting will help ensure accurate cuts and safe cutting of quartz countertops.

Tips for Cutting Quartz Countertops

Here are some additional pointers to help your quartz cutting go smoothly:

  • Mark cut lines a few inches longer to allow room for error
  • Use a straightedge guide to ensure straight cuts
  • Cut quartz face down whenever possible
  • Allow blade to cut steadily without forcing through material
  • Periodically check cut line is staying straight
  • Make relief cuts for interior cutouts before chiseling
  • Keep plenty of room around work area and slab
  • Clean up dust and debris frequently while cutting
  • Wear thick work gloves when handling cut quartz pieces
  • Apply sealant to cut edges to limit absorption

Frequently Asked Questions About Cutting Quartz Countertops

Many homeowners have additional questions when it comes to cutting quartz for countertops. Here are answers to some commonly asked questions:

Can I cut quartz countertops myself or do I need a professional?

With the right tools, cutting quartz countertops is a DIY-friendly process. The main specialized tool needed is a diamond blade grinder made for cutting stone. As long as you follow safe practices and proper technique, cutting quartz yourself can save on installation costs.

What kind of blade do I need to cut quartz?

You will need a diamond-edge blade specifically designed for cutting stone materials like granite, marble, and quartz. Diamond blades have small diamond pieces along the cutting edges to grind through the quartz. Don’t use a wood-cutting blade which can chip and fracture quartz.

How do I make angled or curved cuts in quartz?

Use a template material to trace smooth curved shapes onto the quartz. Follow the line freehand with the diamond blade grinder. Make relief cuts on the inside corners of angles before chiseling away excess quartz. Shape and smooth the final edges with the grinder.

Can quartz crack or break when cutting?

If excessive pressure is applied, quartz can crack or snap because of its rigid makeup. Always cut with light, steady pressure rather than forcing the blade through the material to limit cracks. Make relief cuts before removing chunks from cutouts.

How long does it take to cut quartz?

Cutting time depends on the tools used and complexity of the job. Simple straight cuts may take under a minute. Cutting a large sink area or multiple pieces could take an hour or more. Be patient and allow the blade to work steadily without rushing.

How do I cut a hole in quartz for a sink?

First mark the outline of the sink cutout area. Use a grinder to make relief cuts just inside the corners. Carefully tap out the sink section with a hammer and chisel then smooth the edges with the grinder. Make sink cutouts before securing the full countertop.


Cutting quartz countertops involves careful marking, specialized diamond cutting blades, and focus on straight lines. With these techniques, you can accurately cut quartz for beautiful custom countertop installations. Be sure to plan all needed cuts and allow plenty of time to make them. Follow standard safety practices such as eye and ear protection and controlling dust. Your custom quartz countertop will look professionally installed after making clean accurate cuts during the fabrication process.