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DEWALT 20V MAX Circular Saw, Cordless Sidewinder vs Ryobi One P505 18V Lithium Ion Cordless 5 1/2"

Updated July 2026 — DEWALT 20V MAX Circular Saw, Cordless Sidewinder wins on durability and power, Ryobi One P505 18V Lithium Ion Cordless 5 1/2" wins on price.

The DEWALT 20V MAX Circular Saw offers superior power and build quality, making it ideal for heavy-duty tasks, while the Ryobi One P505 is a budget-friendly option for casual users.

Why DEWALT 20V MAX Circular Saw, Cordless Sidewinder is better

Power

DEWALT has a higher RPM at 5150 compared to Ryobi's 4700.

Blade Size

DEWALT features a larger 6-1/2 inch blade versus Ryobi's 5-1/2 inch.

Build Quality

DEWALT has a magnesium shoe for durability, while Ryobi is less rugged.

Why Ryobi One P505 18V Lithium Ion Cordless 5 1/2" is better

Price

Ryobi is significantly cheaper at $44.89 compared to DEWALT's $129.00.

Battery Compatibility

Ryobi is compatible with existing ONE+ batteries.

Weight

Ryobi is lighter, making it easier to handle for casual users.

Overall score

DEWALT 20V MAX Circular Saw, Cordless Sidewinder
85
Ryobi One P505 18V Lithium Ion Cordless 5 1/2"
65

Specifications

SpecDEWALT 20V MAX Circular Saw, Cordless SidewinderRyobi One P505 18V Lithium Ion Cordless 5 1/2"
RPM51504700
Blade Size6-1/2 inch5-1/2 inch
Weight7.3 lbs5.5 lbs
BatteryNot IncludedONE+ Compatible
Warranty3 Years1 Year

Dimension comparison

DEWALT 20V MAX Circular Saw, Cordless SidewinderRyobi One P505 18V Lithium Ion Cordless 5 1/2"

Price Comparison

The DEWALT 20V MAX Circular Saw is significantly more expensive than the Ryobi One P505. Priced at $129.00, the DEWALT saw costs about 187% more than the Ryobi, which is available for just $44.89. This difference of $84.11 reflects the premium features and power associated with the DEWALT brand, while the Ryobi offers a more budget-friendly option for casual users. If you’re looking for a high-performance tool for heavy-duty tasks, the DEWALT may justify its price. However, for basic household projects, the Ryobi presents a compelling value without a hefty investment.

Performance and Power

When it comes to performance, the DEWALT 20V MAX Circular Saw outperforms the Ryobi One P505 in terms of RPM. The DEWALT boasts a powerful 5,150 RPM motor, which allows for demanding cuts with ease. In contrast, the Ryobi operates at 4,700 RPM. While both tools provide sufficient power for their intended uses, the DEWALT's higher RPM may be better suited for professionals or serious DIYers who need to cut through tougher materials efficiently. For lighter tasks, the Ryobi's performance will suffice, but it lacks the raw power of its competitor.

Blade Size and Cutting Capacity

The DEWALT features a 6-1/2 inch blade, which provides a maximum cut depth of 2-1/8 inches at 90 degrees and 1-5/8 inches at 45 degrees. This larger blade size enhances its ability to handle thicker materials and makes it ideal for more extensive cutting tasks. The Ryobi, with its 5-1/2 inch blade, has a smaller cut capacity, which may limit its effectiveness for more demanding jobs. While the Ryobi is still capable of performing various cuts, those needing deeper or more aggressive cuts will likely find the DEWALT more suitable for their needs.

Durability and Build Quality

The DEWALT 20V MAX Circular Saw is built with a high-strength magnesium shoe, providing durability and job site longevity. This construction is essential for maintaining cut accuracy over time, especially in demanding work environments. In contrast, the Ryobi One P505, while designed for household use, may not match the ruggedness of the DEWALT. The DEWALT's focus on professional-grade materials suggests it is better suited for prolonged use in challenging conditions, while the Ryobi is more appropriate for light to moderate tasks around the home.

Comfort and Handling

User comfort is a noteworthy aspect in both circular saws, but the DEWALT has an edge with its optimized rubber over-molded comfort grip. This feature enhances balance and control during operation, making it easier to handle for extended periods. The Ryobi also includes a GRIPZONE OVERMOLD on its handles, designed to improve friction and handling. However, the additional comfort and balance provided by the DEWALT's grip may make it more appealing for users who prioritize ease of use during longer tasks.

Bevel Capacity

Both the DEWALT and Ryobi circular saws offer impressive bevel capabilities, allowing users to adjust the cutting angle up to 50 degrees. This feature is particularly useful for a variety of applications including angled cuts for woodworking projects. The ability to make aggressive bevel cuts is a common highlight, making both tools versatile options for users. While this aspect is similar in both models, users who require more robust performance in challenging cuts may still prefer the DEWALT for its overall power.

Battery Compatibility

The DEWALT 20V MAX requires a separate purchase for its battery and charger, which can add to the overall cost. The Ryobi One P505, however, is compatible with Ryobi's ONE+ battery system, which offers the flexibility of using the same battery across multiple tools. This can be a significant advantage for users who already own other Ryobi tools and batteries. The DEWALT's separate battery requirement may deter some potential buyers, especially those looking for a more integrated system.

Which should you buy?

Deciding between the DEWALT 20V MAX Circular Saw and the Ryobi One P505 ultimately depends on your specific needs and budget. If you require a powerful, durable, and high-performance saw for professional or extensive DIY tasks, the DEWALT is worth the investment with its superior RPM, larger blade, and robust build quality. However, if you are a casual user or a homeowner looking for an affordable and effective tool for light to moderate projects, the Ryobi presents a fantastic value. With its lower price and compatibility with existing Ryobi batteries, it’s a solid choice for those not needing the heavy-duty capabilities of the DEWALT. Ultimately, your choice should align with your intended use and budget considerations.