How to Drill Hole into Quartz Countertop

Gather the Right Tools

  • Diamond-tipped drill bit – You’ll need a drill bit designed for drilling into stone. Look for one marketed for quartz or granite. Use the size needed for your hole.
  • Masking tape – To prevent the drill bit from slipping.
  • Water spray bottle – The water helps cool the drill bit.
  • Ruler or template – To mark the hole location.
  • Electric drill – A regular power drill on a low setting will work.

Prepare the Countertop Surface

  • Clear the countertop around the desired hole location so you have ample workspace.
  • Mark the center of the hole using a ruler or template. Make a small indent with the drill bit so it doesn’t slip.
  • Place strips of masking tape crisscross over the hole location to further prevent drill slippage.

Drill the Hole

  • Start drilling on a slow speed setting, applying light pressure.
  • Spray water over the hole as you drill to keep the bit cool.
  • Drill partway through, then flip the countertop over to finish from the other side. This prevents chip out.
  • Drill slowly through the remaining thickness until the hole breaks through.

Clean and Finish the Hole

  • Smooth any rough edges with a file or sandpaper.
  • Wash away all quartz dust and dry thoroughly.
  • Apply sealant to the edges of the hole if desired to prevent moisture damage.

Drilling Tips for Quartz

  • Take your time and don’t rush the drilling process. Slow speeds and steady pressure are key.
  • Ensure your drill bit is designed for quartz. Standard bits can crack the stone.
  • Keep the bit lubricated and cool with water to prevent burning the quartz.
  • Backing the countertop with scrap wood prevents chip out when the drill breaks through.
  • Holes with smooth, rounded edges are less likely to crack over time.
  • Resealing the quartz hole edges helps prevent damage from moisture.

Drilling into quartz countertops doesn’t have to be an intimidating process. With the proper diamond-tipped bit, careful hole marking, slow drilling speed, and cooling water, you can add custom holes without damaging the countertop. Just take your time and remember that quartz requires patience for a clean, smooth hole.

Frequently Asked Questions About Drilling Into Quartz Countertops

Can I drill into quartz myself or do I need a professional?

You can drill into quartz yourself as long as you use the right tools and techniques. The process is totally doable for a DIYer. Just be sure to invest in a diamond-tipped drill bit made for quartz and take it slowly. Rushing can crack the quartz.

What size drill bit do I need for a quartz countertop?

Use a diamond-tipped drill bit in the exact size needed for your hole. Most quartz fabricators recommend starting with a smaller pilot hole first before using larger bits to get a clean opening. Don’t use a masonry bit – it will damage quartz.

Where can I buy drill bits for quartz?

You can find diamond drill bits made specifically for quartz at most hardware stores, home improvement centers, or online retailers carrying granite and quartz fabrication tools. Look for bits marketed as diamond core bits for quartz or engineered stone.

How fast should I drill into a quartz countertop?

Drill on a low speed setting, applying light, even pressure. Rushing the process by drilling too quickly can crack the quartz. Take your time and use water to keep the bit cool. Slow and steady is best for clean quartz holes.

Can I drill into quartz with a regular drill?

You can use a standard power drill for quartz countertop holes. Just be sure to use diamond-tipped bits designed for quartz, start on low speed, and keep pressure light to avoid cracking the stone. Don’t use a masonry bit.


Drilling into quartz countertops is doable with some careful preparation and the right techniques. By using the proper diamond-tipped drill bits, drilling slowly, lubricating with water, and preventing slippage with masking tape, you can add custom holes without damaging the quartz. Just remember to have patience and let the tools do the work by applying light pressure and steady drilling speed. With the right approach, you can successfully drill into quartz yourself and enjoy the results of custom holes tailored to your space.