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How to Measure a Chainsaw Bar

When it comes to maintaining and replacing parts on your chainsaw, knowing how to measure a chainsaw bar is an essential skill. Whether you’re a seasoned professional or a DIY enthusiast, understanding the correct measurements will ensure that you select the right replacement bar for your chainsaw. In this guide, we will walk you through the step-by-step process of measuring a chainsaw bar.

Why Measure a Chainsaw Bar?

Before we dive into the measurement process, let’s understand why it’s important to measure a chainsaw bar accurately. The chainsaw bar is the long, flat metal piece that guides the cutting chain. It plays a crucial role in determining the size and power of your chainsaw. By knowing the correct measurements, you can choose the appropriate replacement bar that fits your chainsaw perfectly.

Tools Required

Before you begin measuring, gather the following tools:

  • Tape measure or ruler
  • Marker or pen
  • Flat surface

Step-by-Step Guide

Follow these steps to measure your chainsaw bar accurately:

Step 1: Safety First

Before starting any work on your chainsaw, ensure that it is turned off and the engine is cool. This will prevent any accidents or injuries during the measurement process.

Step 2: Remove the Bar

Take off the cutting chain and remove the bar from your chainsaw. Place it on a flat surface, ensuring that it is clean and free from any debris or dirt.

Step 3: Measure the Length

Using a tape measure or ruler, measure the length of the chainsaw bar from one end to the other. Start from the point where the bar enters the chainsaw body and measure all the way to the tip. Take note of the measurement in inches or centimeters.

Step 4: Measure the Width

Next, measure the width of the chainsaw bar. Place the tape measure or ruler on the top of the bar and measure the distance between the outer edges. Record this measurement as well.

Step 5: Determine the Pitch

The pitch refers to the distance between the drive links on the cutting chain. It is an important measurement to consider when selecting a replacement bar. Check the markings on the side of the bar or consult the manufacturer’s manual to determine the pitch. Common pitch sizes include 3/8″, 0.325″, and 0.404″.

Step 6: Consider the Gauge

The gauge refers to the thickness of the drive links on the cutting chain. It is another crucial measurement to consider when choosing a replacement bar. Check the markings on the side of the bar or consult the manufacturer’s manual to determine the gauge. Common gauge sizes include 0.050″, 0.058″, and 0.063″.

Step 7: Select the Replacement Bar

Now that you have all the measurements, it’s time to select the right replacement bar for your chainsaw. Ensure that the new bar matches the length, width, pitch, and gauge of your original bar. You can find this information in the chainsaw’s manual or consult a professional if you’re unsure.


Measuring a chainsaw bar is a simple yet crucial task that ensures you select the right replacement for your chainsaw. By following the step-by-step guide outlined in this article, you can confidently measure your chainsaw bar and make an informed decision when purchasing a replacement. Remember to prioritize safety and consult the manufacturer’s manual or seek professional advice if needed. With the correct measurements, you’ll have your chainsaw up and running smoothly in no time.

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