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BLACK+DECKER 20V 5-1/2" Cordless Circular Saw, vs Ryobi One P505 18V Lithium Ion Cordless 5 1/2"

Updated July 2026 — BLACK+DECKER 20V 5-1/2" Cordless Circular Saw, wins on sales rank and price, Ryobi One P505 18V Lithium Ion Cordless 5 1/2" wins on rpm.

The Ryobi One P505 offers a more affordable option with good performance, while the BLACK+DECKER excels in torque and tool-free features.

Why BLACK+DECKER 20V 5-1/2" Cordless Circular Saw, is better

Price

BLACK+DECKER is more expensive.

Torque

BLACK+DECKER has a high torque motor.

Tool-Free Features

BLACK+DECKER allows tool-free blade changes.

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

Price

Ryobi is significantly cheaper.

RPM

Ryobi operates at 4,700 RPM.

Bevel Adjustment

Ryobi has a 50-degree bevel adjustment.

Overall score

BLACK+DECKER 20V 5-1/2" Cordless Circular Saw,
70
Ryobi One P505 18V Lithium Ion Cordless 5 1/2"
85

Specifications

SpecBLACK+DECKER 20V 5-1/2" Cordless Circular Saw,Ryobi One P505 18V Lithium Ion Cordless 5 1/2"
Motor TypeHigh TorqueStandard
Bevel Angle45/90 degreesUp to 50 degrees
Tool-Free ChangeYesYes
Grip TypeStandardGRIPZONE Overmold
Battery CompatibilityPOWERCONNECTOne+

Dimension comparison

BLACK+DECKER 20V 5-1/2" Cordless Circular Saw,Ryobi One P505 18V Lithium Ion Cordless 5 1/2"

Price Comparison

When it comes to pricing, the Ryobi One P505 is significantly cheaper than the BLACK+DECKER 20V 5-1/2" Cordless Circular Saw. The Ryobi is priced at $44.89, while the BLACK+DECKER is available for $74.99, making it about 67% more expensive. This substantial price difference may appeal to budget-conscious consumers or those who are just starting out with DIY projects. The lower price point of the Ryobi could allow buyers to allocate funds for additional accessories or more batteries, enhancing overall value.

Performance and Power

Both tools deliver impressive performance, but they cater to slightly different needs. The BLACK+DECKER features a high-torque motor that is designed for a range of DIY tasks, while the Ryobi boasts a speed of 4,700 revolutions per minute, which is comparable to many corded circular saws. This speed allows the Ryobi to handle various cutting tasks efficiently. For users who prioritize a powerful motor, the BLACK+DECKER might be the better choice, but the Ryobi's high RPM could appeal to those who value speed and versatility in their cutting projects.

Blade and Cutting Capabilities

The blade capabilities of both circular saws are tailored for different applications. The BLACK+DECKER comes with a versatile 5-1/2 inch blade, designed for fast cutting and ease of use in various DIY tasks. It features tool-free depth adjustment and a bevel detent at 45 and 90 degrees, making it convenient for angled cuts. On the other hand, the Ryobi also includes a 5-1/2 inch blade and offers an adjustable bevel that can be set up to 50 degrees, providing wider cutting flexibility. This additional angle capability may give the Ryobi an edge for users looking to tackle more complex cuts.

Design and Ergonomics

In terms of design and ergonomics, both products offer features aimed at improving user comfort and control. The BLACK+DECKER includes a compact design for ease of use and a pivoting shoe for additional control. It also allows for tool-free blade changes, which can save time during projects. Conversely, the Ryobi is equipped with a GRIPZONE overmold on its handles, enhancing grip and control. The extra side handle on the Ryobi is strategically placed on the left side, providing improved visibility for the user during cuts. This ergonomic focus may make the Ryobi more appealing for users who prioritize comfort during extended use.

Battery Compatibility

Battery compatibility is another significant factor to consider. The BLACK+DECKER operates on a 20V MAX* POWERCONNECT battery system, which is interchangeable with other tools in the POWERCONNECT line, although the battery is not included with the tool. The Ryobi, on the other hand, works with the One+ line of 18V batteries, which includes models like the P100, P102, P103, P104, P105, P107, and P108, also sold separately. For those who already own Ryobi batteries, this compatibility could offer added convenience and savings, making it easier to expand their tool collection without needing additional batteries.

Portability and Use Cases

Both circular saws are designed to be portable, but they may serve different user scenarios. The BLACK+DECKER is compact and aimed primarily at DIY enthusiasts looking to tackle home repairs and projects. Its high torque motor makes it suitable for various applications, from simple cuts to more demanding tasks. Conversely, the Ryobi's lightweight design and powerful 4,700 RPM make it ideal for users who need to move around their property for demolition projects or various DIY construction needs. Each tool has its niche, with the BLACK+DECKER focusing on home improvements and the Ryobi catering to more mobile cutting needs.

Sales Rank and Popularity

The sales rank of each product provides insight into their popularity among consumers. The Ryobi One P505 has a sales rank of 18,485, which indicates it is quite popular in the market. In contrast, the BLACK+DECKER holds a sales rank of 102,120, suggesting that it is less favored compared to the Ryobi. This discrepancy could reflect consumer preferences for price, features, or brand loyalty, with the Ryobi likely appealing more to budget-conscious shoppers looking for reliable performance.

Which should you buy?

Choosing between the BLACK+DECKER 20V 5-1/2" Cordless Circular Saw and the Ryobi One P505 ultimately depends on your specific needs and budget. If you're looking for a more affordable option with good performance, the Ryobi, priced at $44.89 and featuring a high RPM and adjustable bevel, is an excellent choice. However, if you prioritize higher torque and tool-free features for a range of DIY tasks, the BLACK+DECKER at $74.99 may serve you better. Consider your existing battery compatibility and the type of projects you'll be undertaking to make the best decision for your toolkit.