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How To Measure Chainsaw Bar 10 Easy & Quick Steps

Chainsaws are dangerous tools that need to be handled with care. If the chain is too long, it can get stuck or wrapped around your arm and cause serious injury. The chain will not cut through wood properly if it is too short it will break.

So, before you start cutting any trees down, make sure you know how to measure a chainsaw bar so that your saw doesn’t end up being useless. Check your chainsaw and then follow these simple steps to measure so you can find the right size.

10 Simple Steps on About How to Measure Chainsaw Bars

In today’s society, it is important to know how to measure a chainsaw bar for your own safety. Here’s what you’ll need to do in order to find out what size of chainsaw bar you have:

Step 01: Check Your Owner’s Manual

The first step is to unplug the chainsaw (obviously) to measure a chainsaw bar. You should also check your owner’s manual and see what size of bar your saw requires. You can then use this information throughout the rest of the steps on how to measure a chainsaw bar.

Step 02: Find Out Where You Need To Take Measurements

You should know where to take your measurements from. If you have a 14-inch bar, measure from the middle of the bar hole to the tip of the teeth on both sides. Bar length is 15 inches bar longer and will be measured from one side to another.

It’s important that you only measure the saw-do not include any extension bars that you may have. When a bar measures 18 3/4″ in length, it has a called length of 20″.

Step 03: Gather Your Measuring Tools

In order to measure the chainsaw bar, you’ll need a ruler or a tape measure. You should also have a pencil and paper so you can write down your measurements as you go.

Step 04: Unscrew the Bar Nut

The next step is to unscrew the chainsaw chain bar nut. This is important so you can measure and see what size of chainsaw bar you need. You should be able to easily unscrew this with a wrench or screwdriver.

Step 05: Measure Cutting Length

Once you’ve figured out what size of effective cutting length or called length you have, write it down. Make sure to measure the effective cutting length which is measured from one side of the teeth to another. For example, an effective cutting length for a 14-inch bar is a 14-inch cutting length.

Step 06: Measure True Bar Length

Although you may have the size of the chainsaw bar, it’s important to measure the “true bar length.” This is the length of the bar that emerges with no attachments. Put a metal ruler against the flat part of the bar for this bar to enter.

Step 07: Measure Depth of Drive Link

The depth of the drive link is the depth of where it goes in. You should use a ruler or tape measure to find out if you have .404, .325, or .300 inch. These numbers are located on the right side of the bar usually.

Step 08: Record Your Measurement

Now that you’ve finished measuring your chainsaw bar, it’s time to record all of your measurements. Write down the length of the cutting teeth as well as where you took each measurement from. This will be important so you can find the right size chainsaw bar for your saw.

Step 09: Calculate Blade Length

Now you can calculate what actual length size chainsaw bar you will need by adding your two measurements together (length plus depth).

If your chainsaw doesn’t have a depth chain gauge, you can estimate the depth of the bar by dividing your length measurement by two. That is also what will need to be done for saws that don’t have a chainsaw blade length wear indicator.

Step 10: Purchase a New Chainsaw Bar

If your number falls within the range of chain measurements sizes for the chainsaw bars that are available, then you’ll be ready to purchase a new bar. You can also ask the store clerk if they have any other chainsaw bar sizes for your saw.

Now that you know how to measure chainsaw replacement bar, it will be easier for you to find the right size for your saw. Be sure to take accurate measurements and write them down. This will ensure that you won’t have to repeat this process the next time you need to change your chainsaw body bar.

Chainsaw Bar Measurement Safety Precautions

Although this article explains how to measure chainsaw bars, there are important safety precautions tips that you should take when doing so.

How to Measure Chainsaw Bar Videos

Tip #1: Examine the user manual

It could be dangerous if you don’t know the right size of chainsaw body bar and called length to get. So, check your owner’s manual before doing any measurements or buying anything.

It’s important that you get the right measurement for your bar so that it doesn’t get too short or too longer bar. This can cause injury and possible damage to the saw.

Tip #2: Wear Safety Gear

When measuring or working on chainsaws, it’s important to always wear safety gear. This includes wearing gloves, glasses, and a hard hat. You should also avoid any loose clothing or jewellery that could get caught in the machinery.

Tip #3: Use the Correct Tools

It’s also important to use the correct tools when measuring chainsaw’s bar and chainsaw bar groove. This includes using a wrench or screwdriver to unscrew the chain link nut as well as a ruler or tape measure for taking measurements.

If you don’t have the correct tools, you could end up injuring yourself or damaging the saw.

Tip #4: Keep Children and Pets Away

It’s important to keep children and pets away when working on chainsaws. Chainsaws should only be used by one person and should never be touched or moved when they’re in use.

You also don’t want kids or animals to get hurt while you’re working on the saw. Plus, it’s just a good practice to always do.

Tip #5: Don’t Over Tighten

When you’re finished taking your measurements, be sure to not over tighten the chain link nut. This can damage the saw and make it difficult to adjust in the future. You should only use your hand to tighten it as much as possible.

Types of Chainsaw Bar

There are a few types of chainsaw bars. You should check the manual for your saw to find out what kind you have so you can pick the right one. Here are some types of chainsaw bars:

Sprocket Nose Bar

This bar has a sprocket-shaped nose that helps keep the chain in alignment. It’s also designed to reduce wear on the saw chain and prolong its life.

Solid Nose Bar

This bar is made from a single piece of metal and doesn’t have a sprocket-shaped nose. It’s designed for heavy-duty use and is more durable than other types of bars.

Carving Bar

A carving bar is used for making cuts in wood. It’s designed with a smaller nose to help make precise cuts, but it also makes it harder to cut larger trees.

Narrow Nose Bar

A narrow nose bar has a shorter nose than the standard bars. It’s for lighter cuts in trees and is also known as a limbing bar.

Wide Nose Bar

This bar has a wider nose than the standard types of bars and is mostly used for making larger cuts in trees.

Frequently Asked Questions

There are other questions that people often ask about measuring chainsaw bars. Here are some of the most common ones:

How Do You Measure The Bar On A Stihl Chainsaw?

To measure the bar on a Stihl chainsaw, turn it over to find out the model number. Then, check your instruction manual for this information:
The dimensions in millimeters are the length and diameter of the bar. To get these measurements, take a ruler or tape measure and place it across the rod at both ends. If the bar has a sprocket-shaped nose, be sure to measure from the inside of the curve.

What Is The Most Common Chainsaw Bar Length?

The most common length is 12 to 22 inches. For homeowners, 12- to 18-inch bars are most commonly used.

Do All Chainsaw Guide Bars Look The Same?

No, not all chainsaw guide bar look the same. There are different types of bars with different shapes and sizes. You should check your user’s manual to see what type of bar your saw uses.

Is It Possible To Put Any Bar On A Chainsaw?

It’s possible to put any bar on a chainsaw as longer bars as it’s the correct size.
However, if you don’t use the correct chainsaw chain pitch bar, you could damage the saw and make it difficult to adjust in the future. You should only use your hand to tighten the chainsaw chain pitch link nut as much as possible.

Can I Cut Down A Tree By Myself With a Chainsaw?

Yes, but it’s safer to have an adult help you. Chainsaws are very dangerous and should only be used by one person. Also, children and pets should never touch or move a chainsaw when it’s being used.


Now you know how to measure chainsaw bars. It’s important to get the correct size bar or it can cause injury. Also, you should only use your hand to tighten the chain nut as much as possible.

Just remember these tips when working on your chainsaw and keep children and pets away from it when it’s in use.


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