how to measure a circular saw blade

Are you ready to take your DIY projects up a notch? Then it’s time for you to learn how to measure a circular saw blade. Choosing the right one can make all the difference when it comes to getting that perfect cut, but don’t worry – we’ve got everything covered in this blog post. So let’s dive in and learn more about what goes into selecting the ideal circular saw blade – no guesswork required.

Table of Contents:

Measuring the Blade

Having knowledge of how to measure the blade of your circular saw is crucial to ensure that you acquire the correct replacement or upgrade. The following are some key measurements that you should be aware of when measuring your circular saw blade:


This is probably the most important measurement, as it determines what size blades will fit on your saw. To measure this accurately, use a ruler and place it against the outer edge of one side of the blade. Measure from one end to another and then double this number to get an accurate diameter measurement.


This refers to how wide a cut can be made with each pass through wood or other materials with your circular saw blade. To measure kerf width, use callipers and place them around two teeth at opposite ends of the blade. Make sure they’re snug but not too tight so that they don’t distort any readings; then, take note of their position relative to each other in order to determine kerf width.


Bore size refers to how large (or small) an opening there is in the centre hole, at which point your arbour attaches to your saw motor shafts—this needs to match up exactly with whatever new blades you buy for compatibility purposes. Use callipers again here; simply insert them into either side until they reach their maximum depth and make note of where they stop relative to each other in order for accuracy’s sake when buying new blades later on down the line.


a circular saw blade on the wooden table

Lastly, count up all those little points along both sides (top and bottom) edges – these are called “teeth” – which help create smoother cuts by breaking up material more easily than if there were fewer teeth present on either side (top and bottom). Counting these accurately will also ensure that whatever new blades you purchase have the necessary number of teeth per inch (TPI) for optimal performance when cutting different types/thicknesses of materials, such as hardwoods versus softwoods, etc.

Measuring the blade is an essential step to ensure that you select the appropriate size saw blade for your DIY project. With this information, you can now move on to choosing the right blade for your needs.

Key Takeaway: Measuring a circular saw blade requires taking note of its diameter, kerf width, bore size and teeth per inch. Use callipers and a ruler to get accurate measurements for the best results when replacing or upgrading blades.

Choosing the Right Blade

When it comes to circular saws, the type of blade you choose can make a big difference in the quality and accuracy of your project. There are several different types of blades available for use with circular saws, each designed for specific tasks.

Rip Blades

Rip blades are designed to cut along the grain or lengthwise on wood boards. They have fewer teeth than other blades and those teeth are angled so that they can quickly rip through wood fibres. This makes them ideal for cutting long boards into shorter pieces or making rough cuts on plywood sheets.

Crosscut Blades

Cutting wood using an electric cutting device

Crosscut blades have more teeth than rip blades and their teeth are shaped differently as well; they’re usually flat-topped with alternating bevelled edges, which allow them to slice across the grain instead of ripping it apart as a rip blade would do. These types of blades are great for making precise cuts on finished lumber, such as trimming door frames or window sills, where accuracy is important.

Combination Blades

Combination blades combine features from both crosscut and rip blades, giving you some versatility when tackling projects that require multiple types of cuts in one go. The combination blade has an alternating top bevel (ATB) tooth design which allows it to perform both crosscutting and ripping operations without having to switch out your blade every time you need a different type of cut.

Speciality blades come in all shapes and sizes, depending on the job you’re doing. There are even diamond-tipped ones specifically made for cutting tile. If you know exactly what material(s) you’ll be working with, these speciality sawblades may be worth looking into since they will provide superior performance compared to general purpose models due to their specialised design characteristics tailored towards certain materials such as masonry, plastic, or aluminium.

In conclusion, choosing the right blade is essential if you want accurate results from your circular saw projects – whether it’s ripping long boards into smaller pieces or making precise cuts on finished lumber. Therefore, take some time before starting any project to determine which type best suits your needs.

Key Takeaway: Choosing the right blade is essential for accurate results from your circular saw projects. Consider a rip, crosscut or combination blade, depending on the job and material you are working with. Speciality blades may be worth looking into if they fit your needs better.

FAQs in Relation to How to Measure a Circular Saw Blade

How do I know what size a circular saw blade is?

an electric cutter for cutting wood

Choosing the right size circular saw blade for your project is essential. The size of the blade you need will depend on what type of material you are cutting, as well as the thickness and hardness of that material. Generally speaking, a larger diameter blade should be used when cutting thicker materials such as hardwoods or metals. A smaller diameter blade can be used to cut thinner materials like plywood or particle board. It’s important to check your saw manual for specific recommendations on which blades to use for different types of cuts. Additionally, it’s always best practice to wear safety glasses and other protective gear when using power tools like circular saws.

How do you determine blade size?

Blade size is determined by the width of the cutting edge and its length. Generally, blades are measured in inches or millimetres. The wider the blade, the more material it can cut at once; however, a longer blade may be necessary for deeper cuts. When choosing a blade size, consider what type of material you will be cutting and how thick it is. If possible, test out different sizes to find which one works best for your project. Additionally, make sure that your saw has enough power to handle larger blades before investing in them.

Can I use a 5-inch blade on a 5.5-inch circular saw?

Yes, you can use a 5-inch blade on a 5.5-inch circular saw. However, it is important to note that the blade must be compatible with the saw and that there may be some limitations in terms of cutting depth or speed depending on the size difference between the two components. Additionally, always make sure to read and follow all safety instructions when using any power tool.

How do I know what circular saw blade to buy?

Choosing the right circular saw blade can be a daunting task. It’s important to consider the material you’re cutting, as well as the size and type of blade needed for your project. For woodworking projects, look for blades with carbide-tipped teeth that are designed specifically for cutting wood. If you’re working with metal or plastic, opt for a diamond-coated blade or one made from high-speed steel (HSS). Additionally, make sure to select a blade size that matches your saw’s arbour size and is suitable for the depth of cut required. With these tips in mind, you’ll be able to find the perfect circular saw blade for any job.


When it comes to measuring a circular saw blade, you want to make sure that you get the right size for your project. It’s important to take accurate measurements and choose the correct blade for your needs. With these tips in mind, you can be confident that your next project will go off without a hitch. Don’t forget to practice safety when working with any power tools, and always keep up with regular maintenance of your circular saw blades, so they stay sharp and ready for use. Now that you know how to measure a circular saw blade, why not give it a try?

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