How to Cut a 135 degree Angle with a Miter Saw? 4 Simple Steps Guide (2023)

How to Cut a 135 degree Angle with a Miter Saw

Are you a woodworker and in need of a precise cut?

If so, you’ve come to the right blog!

Today, I will show you how to achieve an exact 135 degree angle on your miter saw with just a few easy steps.

Before beginning the process, it’s important to ensure that your mitre saw is properly set up. Ensure that the blade guard, fence, and bevel are all in their correct positions and that they are secure and not loose.

If necessary, adjust or tighten any components using an Allen wrench or similar tool. Once everything is in place and secure, you can begin setting up your miter saw for cutting your 135-degree angle.

So grab your tools, and let’s get started!

Safety Considerations

Before beginning the process of cutting a 135-degree angle on a miter saw, it is important to take into consideration all safety procedures. Begin by wearing all necessary protective gear, such as goggles or face shields, gloves, and earplugs.

Ensure all guards are in place before starting the tool and that any debris caused by the process is properly swept away to avoid potential slip hazards. Be sure you have secured a firm footing on the ground and have a straight line of vision from your cutting point when operating the device.

Start with the saw setting level and slowly make adjustments at small angles until you reach 135 degrees.

Tools and Materials Needed to Cut a 135 Degree Angle

For cutting a 135-degree angle, you will need the following tools and materials:

  • Miter saw
  • Clamps
  • Measuring tape
  • Marker or pencil for marking the wood

In addition, you will want to get some safety gear to keep yourself from getting injured while using a miter saw. These include goggles, earplugs, dust masks, and protective gloves. You may also want a dust collector vacuum cleaner to keep your work area free of airborne dust.

How to Cut a 135 Degree Angle with a Miter Saw – Step-by-Step

Step # 1 – Setting Up the Miter Saw

Setting up a miter saw correctly is essential to cutting angled cuts that are precise and accurate. Follow the instructions for your specific make and model, as miter saws will vary slightly depending on the manufacturer.

Begin by ensuring the saw is properly connected to an appropriate power supply. Use a power outlet with a Ground

Fault Circuit Interrupter (GFCI) to minimize the risk of electric shock if using a corded miter saw.

Position the saw at 90 degrees with the blade’s right side tilted away from you. Check your saw’s manual for details on how to set this angle, as adjusting techniques may vary by brand or model.

Make sure that when you adjust elevation, it is set appropriate for whatever type of cut you’re making – such as sliding/multi-purpose, trim, crosscut, or bevel cuts – and rotate if necessary.

To make a 135-degree angle cut (or any angle adjustment other than what comes preset in your saw), loosen the knob used for angle adjustments located at the very front of the base plate or guard assembly; this varies depending on your machine but sometimes requires an Allen wrench or Phillips head screwdriver to loosen and release it.

Refer to your user manual’s specifications for how many degrees you need to move from 90 degrees until your desired final setting is reached; tighten adjusted knobs once finished adjusting them accordingly.

Repeat these steps for setting up a perpendicular fence alongside any angled end cuts that correlate to bevel attachment settings to help ensure accuracy when trimming materials down the edge.

Step # 2 – Measuring and Marking the Cut

Measuring and marking the cut is the first step to cutting a 135 degree angle on a mitre saw. Begin by finding the center point of one end of the material you will be cutting.

The next step is to mark two lines, each forming an angle bisector from the point. The lines need to meet at a 90-degree angle from each other, so use a square to mark these two points.

Then measure along the lines from this center point and make two further marks. These should form 135-degree angles and be the reference points for cutting your board or material.

Once these are marked, your miter saw should be set at 22 degrees thirty minutes (22.5 degrees) for cutting a 135-degree outside corner or eleven degrees fifteen minutes (11.25 degrees) for an inside corner joint.

Make sure your miter saw is properly calibrated before beginning work on any project involving precise angles such as this one.

Step # 3 – Cutting the Angle

Cutting a 135-degree angle with a miter saw requires precise measurements and the right technique.
Start by adjusting the mitre saw to that angle. Align the table of your saw with the angle marked on a protractor.

Be sure to measure from both sides of the blade to be sure you get a precise measurement.

Once you’re confident that your angles are correct, double-check your measurement with a carpenter’s square or a hand-held compass.

Next, place a matching piece of wood into position against the table saw edge so that one end is aligned in the corner between two adjoining boards.

Mark each side of the wood piece at equal distances at either end and connect them with a ruler for accuracy.

This will help you maintain accuracy when cutting along this edge and should provide an exact duplicate of any pre-made corners on adjoining boards or pieces of trim work.

Once you have marked your cuts, secure each piece with either clamps or securing screws and proceed to cut using slow, even strokes while keeping an eye on both your saw blade and your marking lines as it progresses through the cut line.

Once finished, smooth any rough spots using fine grit sandpaper before finishing with primer or paint if desired.

Source: Youtube

Step # 4 – Finishing the Cut

Once the angle is adjusted and locked, it’s time to finish making the cut. With the blade guard retracted and your hands out of the way, engage the saw motor and ensure that you are in a comfortable position with a good view of where you are cutting.

With your eyes still on the angle mark, slowly lower the blade and guide it along, following through until you reach the end of your cut. Make sure you firmly grip both handlebars as you make your cut for optimal control.

When finished, turn off the motor, retract what’s left of the blade guard, unplug or switch off power to your saw, and carefully remove any leftover waste from your workspace.

Frequently Asked Questions (FAQs)

What is a 135-degree angle?

A 135-degree angle is formed by two straight lines intersecting at the same point and form an angle of 135 degrees.

Can I use a protractor to measure the angle for cutting on a miter saw?

Yes, a protractor can measure mitre saw cut angles. Align the protractor at the zero-degree mark with the saw’s cutting edge on the base plate. Afterward, rotate the protractor to the right angle and adjust the saw’s angle to match.

Is it necessary to use a laser guide when cutting a 135-degree angle on a miter saw?

No, laser guides aren’t required to cut a 135 degree angle, although they can help with precision.

What blade should I use when cutting a 135-degree angle on a miter saw?

A miter saw blade for cutting at a 135 degree angle depends on the material. In most cases, a fine-toothed, cross-cutting blade is all that’s required to make quick work of wood, whereas a blade made specifically for metal or another material may be required.


Now that you know how to cut a 135-degree angle on a mitre saw, it’s time to practice. If your first few cuts aren’t perfect, don’t worry – patience and practice make perfect! You can make small adjustments as you go, and you will soon have the hang of it.

When you are cutting a 135-degree angle, always double-check that the miter saw is locked in place before turning it on. Wear protective gear like gloves and safety glasses whenever you use power tools like this one.

Don’t forget also to double-check that the cut pieces are the correct length and that their angles are truly at 135 degrees once finished. With care and precision, you can make professional-level cuts with no problem!




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