Step-By-Step Guide For Cutting Glass (Safely) At Home

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If you’re planning to cut glass at home, there are a few things you need to know in order to do it safely. What tools will you need? How do you set up your work area? And most importantly, how do you cut the glass itself?

To cut glass at home, you’ll need a sturdy work surface, solvent, a glass cutter, safety glasses, sandpaper, and gloves. Thoroughly clean the glass with solvent, score it where you want to make the cut, snap the glass along the score line, and smooth down any sharp edges with the sandpaper. 

Now that you’ve got the general idea, let’s take a closer look at everything you need to know to cut glass safely at home. This step-by-step guide will cover the basics of choosing the right tools and how to cut the glass. We’ll also go over how to trim and finish your glass piece to get a professional-looking result.

Gather Materials and Prep the Glass for Cutting

Glazier woman worker cutting glass in workshop

Cutting glass is relatively simple, but it’s important to have the right tools and materials before you start. You’ll need the following items:

Glass Cutter

Glass cutters come in various styles, but they all have a small, sharp wheel that scores the glass. Some glass cutters, like this Toyo Tap Wheel (on Amazon), have a built-in oil reservoir that keeps the cutting wheel lubricated.

Cutting Oil

Lubricant helps the cutter wheel to glide smoothly over the glass surface for a cleaner, more precise cut. It also prevents scratches or marring during cutting.

While you can use kerosene or mineral oil if you don’t have cutting oil, investing in a quality product specifically designed for glass cutting is a always good idea. An oil like this one by Impresa (on Amazon) will make the job easier and produce better results.

Glass Cleaner or Solvent

Using a glass cleaner or solvent to clean the glass before you cut will help remove any dirt, oil, or residue that could interfere with the cutting process and lead to a less precise edge.

Measuring Tape or Ruler

To make precise cuts, you’ll need a measuring tape or ruler to measure the dimensions of the glass. Marking the correct spot on the glass will help to ensure straight cuts.

Marking Pencil or Marker

You’ll use this to mark the starting and stopping points for your cuts. These markings will help you line up your cuts and ensure a precise edge.

A regular marker should do the trick, but a glass-specific marking pencil or marker, like this one from Pasler (on Amazon), is best because it won’t smear or smudge and is easy to remove.


Dowels help to stabilize the glass and keep it from wobbling as you snap it along the score, which can cause an inaccurate break or lead to shattered glass.

Framing Square

The straight edges of a framing square (on Amazon) make marking and measuring your cuts easy, and its 90-degree angles ensure your cuts are precise. 


After scoring the glass with the cutter, sandpaper (on Amazon) will help to remove any small shards or pieces of glass that may have broken off during cutting to create a smooth, finished edge.

Square-Jaw Pliers

The shape of square-jaw pliers (on Amazon) allows for a more stable grip on the glass than other pliers and ensures that the glass will not slip while cutting, which could cause injuries.

Work Gloves

Work gloves like this cut-resistant pair (on Amazon) protect your hands from the sharp edges of the glass and keep your hands from coming into contact with any chemicals or solvents you may use while cutting.

Stable Work Surface

A stable and secure work surface is important because if the glass moves around while cutting, it could easily shatter, or cuts may be imprecise.

Measure, Mark and Lubricate the Glass

Before starting, prep the glass with cutting oil or glass cleaner/solvent to ensure a clean surface and accurate results. Inspect your cutting wheel to ensure it’s sharp — a dull wheel will make it more difficult to score the glass and result in a less precise cut.

Prepare your work surface by making sure it’s stable and level. Once you have your tools and materials set up, you’re ready to cut your glass.

Measuring the Glass

Glazier worker measuring glass in workshop

Use a measuring tape, ruler, or framing square to measure the dimensions of the glass piece you’ll be cutting. You will use these measurements to mark the cut line on the glass. 

It’s important to be as precise as possible when measuring, as even a slight error can result in an inaccurately cut piece of glass.

Marking the Glass

Once you have your measurements, use a marking pencil or marker to mark the start and stop points for your cuts to help line up your cut and ensure a precise edge.

You can also draw a score line if you prefer a visual guide when scoring the glass. A score line is optional, but it can be helpful, especially if you’re new to cutting glass.

Lubricating the Glass

The last step before cutting the glass is lubricating it to help the cutter wheel slide along the cutting surface for a cleaner cut.

When applying the oil, concentrate on the areas where you’ll be making the cuts. A few drops should do the trick.

Score and Break the Glass

Hold the cutter wheel at a 90-degree angle to the surface of the glass and apply pressure while moving the wheel along the score line. You should hear a slight grinding noise as you score the glass.

Once you’ve scored the glass, use your dowel rod or another blunt object to apply pressure to the glass along the score line to break the glass cleanly along the line. 

Be careful not to put your hands too close to the breaking point, as the glass edge is very sharp and can cause cuts.

Finishing Touches: Trim, Sand and Clean Glass

After breaking the glass along the score line, use your square-jaw pliers to trim any slivers. Be careful not to grip the pliers too tightly, as you could shatter the glass.

Once you’ve trimmed the glass, use fine-grit sandpaper to smooth any rough edges. Start with a light touch and increase the pressure if needed.

The last step is to use a glass cleaner or another mild solvent to remove any oil or residue from the surface of the glass. Then, rinse and dry the glass thoroughly before using it.

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