Milwaukee M18 Cordless Lithium-Ion 6-1/2" Circular Saw - vs Ryobi One P505 18V Lithium Ion Cordless 5 1/2"
Updated July 2026 — Milwaukee M18 Cordless Lithium-Ion 6-1/2" Circular Saw - wins on price and weight, Ryobi One P505 18V Lithium Ion Cordless 5 1/2" wins on power and rpm.
The Milwaukee M18 offers superior durability and performance for professional use, while the Ryobi One P505 is a budget-friendly option for DIY enthusiasts.
Why Milwaukee M18 Cordless Lithium-Ion 6-1/2" Circular Saw - is better
Power
Milwaukee has a more powerful motor for tough materials.
Build Quality
Milwaukee features magnesium construction for durability.
Cutting Depth
Milwaukee's 6-1/2" blade allows for deeper cuts.
Why Ryobi One P505 18V Lithium Ion Cordless 5 1/2" is better
Price
Ryobi is significantly cheaper.
Weight
Ryobi is lighter and more portable.
User Features
Ryobi includes extra handle for better control.
Overall score
Specifications
| Spec | Milwaukee M18 Cordless Lithium-Ion 6-1/2" Circular Saw - | Ryobi One P505 18V Lithium Ion Cordless 5 1/2" |
|---|---|---|
| Motor Power | 3500 RPM | 4700 RPM |
| Blade Size | 6-1/2" | 5-1/2" |
| Weight | 10 lbs | 7 lbs |
| Durability | High | Medium |
| Price | $94.00 | $44.89 |
Dimension comparison
Price Comparison
The Ryobi One P505 is significantly more affordable than the Milwaukee M18. Priced at $44.89, the Ryobi is about 52% cheaper than the Milwaukee, which costs $94.00. This price difference may appeal to budget-conscious consumers or those seeking a reliable tool for light to moderate tasks without a significant financial investment. While the Milwaukee offers advanced features suited for heavy-duty applications, the Ryobi provides solid performance at a lower price point, making it an attractive option for DIY enthusiasts and homeowners.
Power and Performance
In terms of power, the Ryobi One P505 has a higher RPM at 4,700 compared to the Milwaukee M18's 3,500 RPM. This translates to faster cutting speeds, which can be beneficial for quick jobs or when working with softer materials. However, the Milwaukee is designed to handle tougher materials, making it ideal for professional applications like plumbing and framing. The difference in RPM indicates that while Ryobi may offer more speed, Milwaukee excels in durability and cutting through hard materials, appealing to different user needs.
Design and Build Quality
The Milwaukee M18 boasts a durable magnesium construction, enhancing its longevity and blade protection. Its ergonomic grip is designed for comfort during extended use, ensuring controlled cuts. Conversely, the Ryobi features a GRIPZONE overmold on its handles for improved handling, along with a transparent lower guard for visibility during cuts. While both tools have user-friendly designs, the Milwaukee’s robust materials may be more suitable for professionals looking for a long-lasting tool, whereas the Ryobi's design focuses on ease of use and visibility for casual users.
Cutting Capability
When it comes to cutting capability, the Milwaukee M18 is equipped with a 6-1/2" blade, allowing for deeper cuts compared to the Ryobi's 5-1/2" blade. This larger blade size enables the Milwaukee to tackle more substantial materials and achieve greater depth in cuts. The Ryobi does offer an adjustable bevel capability up to 50 degrees, providing versatility for various angles. This feature makes the Ryobi suitable for DIY projects that require angled cuts, while the Milwaukee is better suited for heavy-duty tasks requiring deeper cuts.
Portability
Both tools are cordless, making them highly portable for various projects. The Ryobi One P505 is designed with mobility in mind, allowing users to easily transport it around their property for demolition or construction tasks. On the other hand, the Milwaukee's lightweight design is complemented by its powerful performance, making it equally portable while retaining robust cutting capabilities. For users who prioritize mobility alongside performance, both tools stand out, but the Ryobi may be more appealing due to its lower weight and compact design.
User-Friendly Features
The Ryobi One P505 includes features such as an extra side handle for improved control and a tool-less blade change compartment, making it user-friendly for those who may need to switch tasks quickly. In contrast, the Milwaukee M18 emphasizes durability with its magnesium guards and ergonomic grip. While both tools are designed with the user in mind, Ryobi’s additional features cater to ease of use, making it more accessible for DIYers and casual users, whereas Milwaukee’s focus on durability may appeal to professional users.
Brand Reputation and Sales Rank
Both Milwaukee and Ryobi are reputable brands in the power tool market, but they cater to different segments. The Milwaukee M18 has a sales rank of 17,973, indicating its popularity among users looking for high-performance tools. Ryobi, with a sales rank of 18,485, is also well-regarded, particularly among DIY enthusiasts. Milwaukee’s strong emphasis on durability and professional-grade tools gives it an edge for serious users, while Ryobi’s affordability and accessibility attract a broader audience for home projects.
Which should you buy?
Choosing between the Milwaukee M18 and the Ryobi One P505 ultimately depends on your specific needs. If you require a powerful, durable tool for professional use, the Milwaukee M18 is the superior choice, offering robust performance and build quality. However, if affordability and ease of use are your top priorities for home projects, the Ryobi One P505 presents a compelling option at a significantly lower price. Assessing your intended use will help you make the right decision between these two excellent circular saws.

