18 vs 20 Inch Chainsaws: A Comprehensive Guide

Published Categorized as Chainsaw Buying Advice, What Size Chainsaw

Choosing the right chainsaw size is crucial for efficient and safe tree cutting. A chainsaw is an indispensable tool for professional arborists and DIY enthusiasts. The two most common sizes are 18-inch and 20-inch chainsaws. In this article, we’ll compare 18 and 20 inch chainsaws to help you make an informed decision.

Table of Contents

18 vs 20 Inch Chainsaws: A Comprehensive Guide

Cutting Performance

When it comes to cutting performance, both 18-inch and 20-inch chainsaws have their strengths and weaknesses. The 20-inch chainsaw is capable of cutting thicker branches and logs, making it ideal for heavy-duty tasks. On the other hand, the 18-inch chainsaw is more versatile and can handle a wider range of tasks with ease. It is also lighter and more maneuverable than its 20-inch counterpart, making it easier to handle for extended periods of time.

Power and Engine Size

The engine size of a chainsaw determines its power output. Generally, the 20-inch chainsaw has a larger engine than the 18-inch model, giving it more power. However, this doesn’t mean that the 18-inch chainsaw is underpowered. It still has enough power to handle most tasks, especially if you choose a model with a high-performance engine. When considering the engine size, you should also consider the weight of the chainsaw. A heavy chainsaw with a large engine can be challenging to handle for extended periods, while a lighter chainsaw is easier to use.


Maintenance is an important aspect to consider when choosing a chainsaw. A chainsaw with a larger engine will require more frequent maintenance than a smaller model. This is because the larger engine produces more wear and tear on the chainsaw’s internal components. On the other hand, a smaller engine is easier to maintain, making it a better choice for occasional users.


The price of a chainsaw can vary greatly, depending on the size and features. A 20-inch chainsaw will typically be more expensive than a 18-inch model. This is because the larger engine and more advanced features add to the overall cost of the chainsaw. However, the higher cost can be worth it if you plan to use the chainsaw frequently for heavy-duty tasks.


In conclusion, choosing between an 18-inch and 20-inch chainsaw depends on your needs and preferences. If you’re looking for a versatile and easy-to-handle chainsaw, the 18-inch model is the way to go. However, if you plan to tackle heavy-duty tasks, a 20-inch chainsaw may be the better choice. Before making a decision, consider factors such as cutting performance, power and engine size, maintenance, and price.

By Dave Cross

Hi, I'm Dave. I’ve been sawing for more than 40 years. I feel most at home when I’m surrounded by nature and my saws, but occasionally, I’ll share some of my know-how and experience on Cross Saw Mill.

Leave a comment

Your email address will not be published. Required fields are marked *