How to Cut a 135-Degree Angle on a Miter Saw?

Picture yourself in a well-lit woodworking workshop, surrounded by the soothing scent of fresh-cut wood. You’re in a project that demands precision beyond the ordinary 90-degree angles. The need for a 135-degree angle cut arises, and your woodworking skills are suddenly tested.

It’s an intricate task that requires finesse, precision, and a keen eye for detail. Unveiling the secrets to achieving that elusive 135-degree perfection on your miter saw. In this article we are going to dicuss (How to Cut a 135-Degree Angle on a Miter Saw) in detail.

Why 135-Degree Angles Matter?

Imagine the satisfaction of crafting corners that fit seamlessly together, creating stunning frames, intricate moldings, or unique geometric designs. With the knowledge and techniques, we’ll explore, you’ll be equipped to tackle woodworking projects with newfound confidence and artistry.

So, don your safety gear, set up your miter saw, and prepare to uncover the craftsmanship of cutting 135-degree angles in all their intricate glory.

Cutting a 135-Degree Angle: Step by Step

A 135-degree Angle on a miter saw may seem daunting, but it becomes a straightforward task with the proper guidance and technique. Whether you’re working on a woodworking project or need to join two pieces at an unconventional angle, these five simple steps will help you achieve precision and accuracy.

Step 1: Safety First

Before you start any cutting, safety should be your top priority. Put on safety goggles and hearing protection to shield yourself from potential debris and noise. Also, ensure that your miter saw is placed on a stable surface and is in good working condition.

Step 2: Set Up Your Miter Saw

Begin by unlocking the miter saw’s rotating arm and tilting mechanism. Most miter saws have preset stops at common angles, but for a 135-degree cut, you’ll need to set the saw manually. To do this:

  • Unlock the miter angle adjustment knob.
  • Gradually turn the saw to the left until you reach 45 degrees.
  • Then, turn it an additional 90 degrees to the left, giving you a total angle of 135 degrees. Ensure the angle is precise by using a protractor or angle finder.

Step 3: Mark Your Material

Measure the material you want to cut and mark the starting point of your 135-degree angle. Use a pencil or a fine-tip marker, and make a clear, visible line to guide your cut.

Step 4: Make the Cut

With your material marked and your miter saw set to 135 degrees, it’s time to cut. Follow these steps:

  • Hold your material firmly against the fence and the saw’s base, ensuring it won’t move during the cut.
  • Start the saw and, in a slow, controlled motion, lower the blade onto the marked line.
  • Keep your hands away from the blade path and maintain a steady pace as you cut through the material.

Step 5: Check the Cut

Once the cut is complete, carefully inspect the angle to ensure it matches your intended 135-degree angle. Use a square or protractor to verify the accuracy. If adjustments are needed, make them accordingly and recut the material if necessary.

Making a 135-Degree Angle with Two Cuts

It can be challenging due to the limitations of many miter saws. An alternative approach involves making two separate cuts and combining the pieces to form the desired 135-degree angle. Here’s how you can do it:

Materials and Tools Needed:

  • Miter saw
  • Workbench or sawhorses
  • Safety gear (safety glasses, hearing protection)
  • Measuring tape
  • Pencil or marker
  • Two pieces of material (e.g., wood) that you want to join at a 135-degree angle
  • Wood glue
  • Clamps
  • Square or protractor

Step 1: Measure and Mark

Start by measuring and marking the 135-degree angle on each piece of material you want to join. Use a measuring tape and a protractor to ensure accuracy. Make clear, visible marks on both pieces.

Step 2: Set Up Your Miter Saw

Set your miter saw to a 45-degree angle. Most miter saws can easily make 45-degree cuts. Make sure the saw is securely positioned on your workbench or sawhorse.

Step 3: Make the First Cut

Place the first material on the miter saw base, aligning it with the saw’s fence. Position the marked line at the edge of the saw’s cutting area. Hold the material firmly, start the saw, and slowly lower the blade to cut. This will create a 45-degree angle on the first piece.

Step 4: Make the Second Cut

Repeat the process for the second piece of material, setting your miter saw to a 45-degree angle. Ensure that the angle matches the marked line on this piece.

Step 5: Test the Fit

After making both cuts, you should have two pieces with 45-degree angles. Place them together to form a 90-degree angle. Use a square or protractor to measure the angle between them. If it’s not precisely 90 degrees, adjust the cuts as needed until you achieve a perfect 90-degree angle.

Step 6: Join the Pieces

Apply wood glue to the angled edges of the two pieces and press them together to form a 90-degree angle. Use clamps to hold them firmly in place while the glue dries. Follow the manufacturer’s instructions for the glue drying time.

Step 7: Check the Final Angle

Once the glue has dried, measure and confirm that the angle between the two joined pieces is 135 degrees using a square or protractor.

Why Use a Miter Saw for Angale Cuts?

A miter saw is an excellent tool for making angle cuts in various materials, primarily used for cutting wood. Still, it can also be used for cutting materials like plastic or certain metals. Here are several reasons why you would use a miter saw for angle cuts:

  • Precision: Miter saws are designed for precision and accuracy. They allow you to easily make highly accurate angle cuts, which is crucial in woodworking and other applications where precision matters.
  • Speed: Miter saws are efficient and can make angled cuts quickly. This is especially beneficial when you have multiple cuts, as it saves you time and effort compared to using hand tools.
  • Versatility: Miter saws can make a wide range of angle cuts. They can cut angles from 0 degrees (straight cuts) to typically up to 45 degrees on either side (for a total range of 90 degrees). Some compound miter saws can cut even more complex angles like slopes in addition to miter angles.
  • Consistency: Miter saws allow you to maintain consistent and repeatable angle cuts. This is particularly important in woodworking when you need identical cuts for things like frame pieces or moldings.
  • Safety: Miter saws come with safety features like blade guards, fences, and hold-down clamps that help prevent accidents and keep your hands away from the cutting area, making them safer than some other cutting methods.
  • Clean Cuts: Miter saws typically provide clean and smooth cuts, reducing the need for extensive sanding or finishing after the cut.
  • Ease of Use: Miter saws are relatively easy to use, making them accessible to beginners and experienced woodworkers. The setup is straightforward, and with some practice, you can achieve precise cuts consistently.
  • Portability: Many miter saws are designed to be portable, making them suitable for on-site work and various projects where you need to move the tool around.

Safety Precautions

Before operating a miter saw or any power tool, it’s crucial to prioritize safety. Here are some safety precautions to keep in mind:

  • Hearing protection: Miter saws can be loud, so use earplugs or earmuffs to safeguard hearing.
  • Dust mask or respirator: Prevent inhalation of sawdust and airborne particles.
  • Read the Manual: Familiarize yourself with the manufacturer’s instructions and guidelines for your miter saw model.
  • Work in a Well-Ventilated Area: Proper ventilation helps disperse dust and fumes from the saw.
  • Secure the Workpiece: Ensure your material is firmly clamped or secured against the miter saw’s fence to prevent it from moving during the cut.
  • Maintain a Clear Work Area: Remove obstructions or debris around the miter saw to prevent tripping hazards or interference during operation.
  • Check the Blade and Saw: Ensure the saw blade is sharp, clean, and in good condition. Dull blades can cause kickbacks. Ensure all safety guards, including the blade guard, are in place and functioning correctly.
  • Proper Body Position: Stand to the side of the blade, not directly in front of it. Keep your body positioned to the side of the saw’s cutting path.
  • Keep Hands Away from the Blade: Never reach across or behind the saw blade while it’s in motion. Use a push stick or a hold-down clamp for small workpieces to keep your hands at a safe distance.
  • Check Power and Cord Placement: Ensure the power cord is out of the way and won’t interfere with your cutting motion. Use a grounded outlet or extension cord rated for your miter saw’s power requirements.
  • Start the Saw Safely: Wait until the saw blade has reached full speed before making your cut. Avoid engaging the blade with the material while in the “up” position.
  • Use Appropriate Support for Long Materials: When cutting longer pieces, use additional supports, such as sawhorses or rollers, to prevent the material from sagging or falling during the cut.
  • Never Remove Offcuts While the Blade Is Spinning: Wait for the blade to come to a complete stop before clearing away any cut-off pieces.
  • Double-Check Your Angle Settings: Before cutting, ensure that your miter saw is accurately set to the 135-degree angle.
  • Follow the 135-degree Cutting Procedure: As mentioned in the previous responses, execute the cut following the specific steps for cutting a 135-degree angle on your miter saw.
  • Stay Focused: Pay full attention to your work. Avoid distractions and maintain a clear mind while operating the miter saw.
  • Practice Caution with Materials: Be cautious when working with warped or irregularly shaped materials, as they may behave unpredictably during the cut.
  • Education and Training: If you’re new to using a miter saw, consider seeking guidance or training from an experienced woodworker or professional.

Properly Setting Up a Miter Saw for a 135-Degree Angle Cut

You must follow meticulous steps to set up a miter properly for a precise 135-degree angle cut. Before you begin, ensure you are equipped with the necessary safety gear. Here are the steps:

  1. Hearing protection: Verify that your miter saw is in good working condition and on a stable surface.
  2. Miter Angle Adjustment:
    • Unlock the miter angle adjustment on your saw.
    • Gradually turn the saw to the left until it reaches 45 degrees, a common preset stop.
    • Rotate the saw an additional 90 degrees to the left, totaling a miter angle of 135 degrees. Use an angle finder or protractor to ensure accuracy.
  3. Bevel Angle:
    • Set the bevel angle to 0 degrees, ensuring the blade is straight up and down without any bevel angle.
  4. Measure and Mark:
    • Measure and mark your material.
    • Securely place it on the saw base against the fence.
  5. Safety First:
    • Exercise caution throughout the cutting process.
    • Maintain a steady pace and use a push stick or hold-down clamp as needed.
  6. Inspect the Cut:
    • After the cut, measure and confirm that the angle matches the intended 135 degrees using a square or protractor.


Setting up a miter saw to make a precise 135-degree angle cut is a meticulous process that demands attention to detail and a strong focus on safety. Following the step-by-step instructions outlined above can achieve the desired angle accurately and safely. Remember to wear the appropriate safety gear, double-check your measurements, and maintain a clear work area. 

A miter saw’s versatility and precision make it an invaluable tool for woodworking and various DIY projects. It allows you to create precise angles for frames, moldings, and other intricate pieces. Whether you are experienced or mastering the art of angle cuts on a miter saw will elevate your craftsmanship and open up new possibilities in your woodworking endeavors.

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