How to Measure Chainsaw Bar Length? Ultimate Guide

Measuring the bar of your chainsaw is important for making sure it is correctly installed and is the right length for your intended use. If the bar is too long, it will increase the weight of the chainsaw and make the chainsaw difficult to control. On the other hand, a bar that is too short may limit the power of the chainsaw and reduce your productivity. Knowing how to measure chainsaw bar correctly is important for getting the most out of your chainsaw.

How To Measure Chainsaw Bar

Steps of Measure Chainsaw Bar

In this guide, we will walk you through the steps of properly measuring a chainsaw bar. Follow these steps of measuring the chainsaw bar.

Step 1: Remove the Bar and Chain

To begin the process of measuring your chainsaw bar, start by turning off and unplugging the chainsaw, or remove the battery if it’s a cordless model.

Remove the Bar and Chain

Next, carefully separate the bar and chain from the saw. Being extra cautious and following these steps is key to ensure a safe and successful measurement.

Step 2: Measure the Chainsaw Bar Length

Steps to Measure the Bar Length of a Chainsaw:

1. Using a reliable measuring tool like a tape measure or ruler, measure the bar length from the chainsaw housing to the farthest point of the bar.

2. Make sure to only measure the chainsaw bar and not the entire chainsaw cutting system.

Measure the Chainsaw Bar Length

3. For accurate reading, get the measurement nearest to the inch.

4. Be precise and careful when taking the measurement to ensure accuracy.

Common Chainsaw Bar Length List:

Here is the table of common chainsaw bar lengths:

Chainsaw Bar LengthRecommended Use Cases
8-12 inchesLight duty (pruning and trimming)
14-16 inchesMedium duty (use for cutting small trees & limbs)
18-20 inchesHeavy duty (cutting for larger trees and logs)
22-24 inchesProfessional grade (use for large scale cutting and felling trees)


If you get the measurement “13 5/8 inches

If the measurement reads “13 5/8 inches”, then the bar cutting length is “14 inches”. The cutting length can be referred to as the usable length, or effective length, or called length. Chainsaws usually come with cutting lengths of “14, 16, 18, and 20 inches”. This may be different only according to the manufacturer.

Step 3: Measure the Bar Mount

To find the right size bar for your chainsaw, you need to measure the distance between the bar mount holes.

1. Gather ruler/caliper.

2. Measure the distance between the center of one hole to the center of the other.

3. Record the measurement.

Measure The Bar Mount

This measurement will help make sure that your new bar will fit your saw properly, giving you the best results.

Step 4: Check for Compatibility

Before buying your new chainsaw bar, check it is fit for your chainsaw. Check the manufacturer’s specifications for bar length and bar mount hole spacing. This information is only available in chainsaw user manual guides. Additionally, double-check that the bar is designed for your specific chainsaw model to ensure maximum compatibility.

Step 5: Choose the Right Replacement Bar

Once you have the measurements and know the manufacturer’s recommendations, it’s time to choose the right replacement bar for your chainsaw. With a variety of retailers to choose from, including home improvement stores, chainsaw dealerships, and online retailers, you’ll be sure to find the perfect bar for your chainsaw needs. Be sure to double-check the measurements and manufacturer’s recommendations before making your purchase.

Step 6: Install the Replacement Bar

Installing your new bar on your chainsaw is the final step. Carefully follow the manufacturer’s instructions for installation. Make sure to securely tighten the bar nuts, but not too tight, as over-tightening can damage the bar or chainsaw. After completing installation, now time to use the chainsaw with a new bar.


Measuring a chainsaw bar is a straightforward process that, when done correctly, can help you find the perfect replacement bar for your saw. To get the most accurate results, make sure you measure the bar length and bar mount hole spacing accurately. Additionally, it is important to consult the manufacturer’s recommendations before making a purchase, so you can be sure you are getting the right bar for your saw. With the right replacement bar, your chainsaw will be good again.