How to Cut Glass Tile Backsplash

Installing a glass tile backsplash can add a beautiful, elegant touch to any kitchen. Glass tiles come in a dazzling array of colors, shapes, and sizes, allowing you to create a truly custom look. However, working with glass tile requires special care, especially when it comes time to cut the tiles to fit your design. With the right tools and techniques, you can accurately and safely cut glass tile for your backsplash installation.

Selecting the Right Glass Tile for Your Project

When selecting glass tile, you’ll first want to decide on the look you’re trying to achieve. Glass tile backsplashes can range from subtle and sophisticated to bold and vibrant. Consider the overall style of your kitchen – modern, traditional, farmhouse, etc. – and choose glass tile colors and shapes that will enhance that aesthetic.

You’ll also want to look at the size of the glass tiles. Small mosaics with tiny 1-inch tiles can create a busy, intricate pattern. Large 6-inch tiles make more of a statement, with fewer seams. A mix of sizes can add interest. Just be sure to get tiles that are all the same thickness for even installation.

Finally, consider the finish. Glass tiles come in glossy, frosted, or iridescent finishes. Glossy tiles have the most shine and reflectivity, while frosted mutes the color slightly with a satin sheen. Iridescent tiles change color depending on the lighting and viewing angle.

Once you’ve settled on the right tile for your backsplash vision, order about 10-15% extra to account for cuts, waste, and future repairs.

Tools Needed for Cutting Glass Tile

Cutting glass tile is not the same as cutting ceramic or porcelain tile. You cannot simply score and snap glass tile. Specialized cutting tools are required to make clean, precise cuts.

Glass Cutter

A glass cutter is essential for cutting glass tile cleanly. This specialized tool has a small carbide or diamond cutting wheel that “scores” the glass surface. You apply firm, even pressure as you roll the wheel along a straight line.

Opt for a cutter with an oil-filled barrel reservoir that lubricates the wheel. Lubrication prevents binding, tearing, or chips in the glass.

Glass Nippers

Once glass is scored with the cutter, a pair of glass nippers is used to snap the tile along the scored line. The nippers bite into the glass and create a clean break.

Look for nippers with comfort grips, spring-loaded handles, and precision ground jaws. Make sure they are specifically designed for cutting glass.

Wet Saw

A wet saw with a diamond glass blade can make precise cuts in glass tile, such as for notches, holes, or mitered edges. The water prevents the blade from overheating the glass.

Wet saws are more expensive and messy, but worth the investment if you’ll be doing a lot of glass tile cutting.

Safety Equipment

Always wear safety glasses when cutting glass to protect your eyes from flying shards. Waterproof gloves will protect your hands from sharp edges. A dust mask is also recommended to prevent inhaling glass dust particles.

How to Cut Glass Tile with a Glass Cutter and Nippers

Step 1: Measure and mark your cut line using a ruler and permanent marker. Remember to account for spacers by marking about 1/16 inch inside the actual cut edge.

Step 2: Position the glass tile on a flat, stable surface. Place a piece of scrap wood or rubber under the tile to cushion it.

Step 3: Align the cutting wheel on your glass cutter precisely along the cut mark. Ensure the cutter reservoir is filled with cutting oil.

Step 4: Maintaining a 45° angle, roll the glass cutter firmly along the cut line. Apply smooth, even pressure for the entire length of the cut.

Step 5: Flip the tile over and score the backside as well, tracing over the existing cut mark. Scoring both sides of the glass prevents splintering.

Step 6: Place the nippers on one end of the score line. Apply gentle, even pressure with a rocking motion to bite into the glass.

Step 7: Once the nippers create a small nip, continue biting along the scored line until the tile separates.

Step 8: If needed, use a piece of sandpaper or silicon carbide stone to smooth any rough edges. Be gentle to prevent damaging the tile edges.

Cutting Holes or Notches in Glass Tile

Cutting notches from glass tile, such as for outlets or plumbing fixtures, takes some added care. Here is a step-by-step method:

Step 1: Measure and mark the dimensions of the notch on the tile. Remember to account for spacers.

Step 2: Use the glass cutter to score straight lines defining all sides of the notch. Score on the front and back.

Step 3: Place the tile on a stable surface over a piece of rubber or wood. Position the nippers in the interior corner of the notch.

Step 4: Gently nibble out small bits of glass working toward the center of the notch. Take your time. Don’t rush.

Step 5: Once you’ve nibbled out the center, carefully nibble from the outer corners to the edges to remove the notch cleanly.

Step 6: Carefully smooth rough edges with sandpaper. Test fit the cut tile to ensure an accurate opening.

Cutting Curves and Shapes in Glass Tile

Cutting curved shapes in glass tile can be tricky. Whenever possible, it’s best to use factory-cut shaped tiles in your design rather than trying to cut curves onsite yourself.

However, if you need to cut a curved shape from standard rectangular tiles, here are a few options:

  • Use a wet saw with a diamond glass blade to gently cut smooth curves in the tile. Let the blade do the work. Don’t force or rush the cut.
  • For tighter curves, shape the curve using multiple straight scored lines and nippers rather than trying to cut a smooth arc.
  • Layer your design to fit the space rather than cutting the glass. For example, cut rectangular tiles into trapezoid shapes to build concentric curves.
  • Consider mixing glass mosaics or smaller tiles into a pattern to fill unique spaces rather than cutting larger tiles.

Cutting Tiles for Outlets, Switches, and Valves

Tile around electrical boxes, switches, valves, and plumbing requires careful measurement and precision cutting. Here are some tips:

  • Always turn off power and water supplies before cutting tile in these areas.
  • Measure carefully and account for the lip of the box and the thickness of your tile and adhesive.
  • Cut tile just slightly larger than your measurements to test the fit. You can always nip away more glass to perfect the opening, but can’t add it back.
  • Use nippers and gentle pressure rather than forcing tiles to fit around boxes. This avoids cracking tiles.
  • Blend cuts carefully to make openings less visible. Cut partial tiles and filler pieces to continue patterns around openings.
  • If making multiple identical cuts, stack tiles and score all pieces together before nipping.
  • Take your time and don’t rush the nibbling process. Small careful bites work better than aggressive chomps.

Cutting Glass Tile Around Obstacles and Odd Shapes

Cutting glass tile backsplashes for uneven walls, pipes, or unique spaces takes planning. Avoid forcing tiles into place or making hasty freehand cuts. Here are some tips:

  • Make cardboard templates of any odd-shaped areas before cutting tiles. Test fit the templates to ensure proper fit.
  • Transfer the template outline to the tiles and mark cutting lines. Remember to account for adhesive and grout lines.
  • Stack tiles in an alternating pattern and make all necessary cuts before installing. This ensures uniformity.
  • Cut partial tiles, small filler shapes, and tiles into trapezoids to fill irregular areas rather than freehand shaping.
  • Use nipping rather than wet saw cutting for detailed shaping so you can incrementally achieve an exact fit.
  • Take your time cutting difficult shapes. Don’t rush through it. Step away if you become frustrated.
  • Have extra tiles on hand in case any break during detailed cutting. It happens, so be prepared.

Tips for Cutting Glass Tile Like a Pro

Follow these pro tips as you cut glass tile for an expert-quality finished product:

  • Work slowly and patiently especially when nibbling out detailed notches or curves. Rushing leads to cracks and uneven shaping.
  • Keep your glass cutter oiled and your nipper jaws sharp for clean cuts. Replace if needed.
  • If a tile piece cracks or breaks irreparably, don’t frustrate yourself trying to salvage it. Discard it and move to the next.
  • Set tiles to be cut on a towel or rubber mat rather than hard surfaces to prevent cracking and chipping.
  • Invest in quality cutting tools. Don’t try to cut glass tile with a cheap cutter or dull nippers.
  • Practice first on glass tile scraps or inexpensive extra tiles. Perfect your technique before moving to your final cuts.
  • Ensure your workspace is free of clutter, dust, and distractions. You need precision and focus when cutting glass tile.
  • Keep a small brush handy to whisk away glass dust as you work so it doesn’t interfere with scoring lines or nipper grips.
  • Discard chipped or cracked tiles. Don’t use damaged tiles in your project even on hidden edges.
  • If you make an imperfect cut, put that tile on an inside corner or non-visible edge rather than in focal areas.

With the right preparation, tools, and techniques, you can make accurate cuts in glass tile for beautiful finished results. Just remember to be patient, precise, and proceed with care. The time and diligence will pay off when your hand-cut glass tile backsplash is installed.

Frequently Asked Questions About Cutting Glass Tile

Cutting glass tile adds beauty and elegance to any backsplash or accent wall. However, it requires specialized tools and careful techniques. Here are answers to some frequently asked questions about cutting glass tile:

Can I score glass tile just once rather than both sides?

No. Scoring both sides prevents chips and spiderweb cracking through the interior of the tile. The small amount of extra time is worth it.

My tiles are cracking and chipping when I try to cut or nip them. What am I doing wrong?

Most likely your cutting wheel is not well-oiled or your nipper jaws are dull. Dull tools require extra force that can crack the tile. Replace or sharpen them.

What’s the best way to cut small notches for outlets and switches?

Mark the outline and score all sides with a cutter. Use nippers to gently nibble out bits working from the center outwards. Take your time nibbling rather than forcing large chunks.

Can I just tap the tile along the scored line rather than using nippers?

Tapping or snapping is risky and often leads to uneven sharding rather than a clean edge. Invest in quality nippers designed for controlled glass breaking.

What type of blade do I need for a wet saw to cut glass tile?

Always use a high-quality diamond glass blade specifically designed for wet cutting glass tile. Don’t attempt to cut glass with a ceramic tile blade.

Any tips for drilling holes in glass tile?

Invest in a specialized glass and tile drill bit made with a tungsten carbide tip. Drill slowly at about 600rpm while lubricating the surface with water or oil. Let the bit do the work.

Why are my straight cuts in glass tile turning out crooked or uneven?

Apply even pressure when scoring, keep your cutter perfectly straight, and nip carefully and smoothly without twisting or torquing the tile. Practice your technique on scraps first.

Help! I cracked my last few tiles right before finishing this project. What do I do?

Order 5-10% extra tiles from the start for exactly this reason. If you don’t have spares, check with the manufacturer – they may sell individual replacements, or find the closest match possible.

How can I cut glass tiles around an uneven wall or existing materials?

Make cardboard templates of the unique shapes first and test for proper fit. Then transfer outlines to the tiles, score, and nibble out them out carefully.


Installing a custom cut glass tile backsplash can take your kitchen design to the next level with beautiful light reflections, color, and added elegance. With the right cutting tools – including a quality glass cutter, nippers, and possibly a wet saw – you can create any shape needed for your project. Have patience, work carefully, and don’t rush the process for clean, professional results. Always order extra tiles to account for mistakes, breaks, and repairs down the road. And remember to enjoy the creative process – part of the reward of a glass tile backsplash is being able to stand back once installed and take pride knowing you cut each intricate shape by hand.