Ryobi One P505 18V Lithium Ion Cordless 5 1/2" vs Ryobi P506 One+ Lithium Ion 18V 5 1/
Updated July 2026 — Ryobi P506 One+ Lithium Ion 18V 5 1/ leads on price and weight.
The Ryobi P505 offers a more budget-friendly option for general tasks, while the P506 provides enhanced precision with its laser guide. Choose based on your specific needs.
Why Ryobi One P505 18V Lithium Ion Cordless 5 1/2" is better
lower price
P505 is $44.89 compared to P506's $69.00
lighter weight
P505 is easier to handle for casual users
basic functionality
P505 is sufficient for general DIY tasks
Why Ryobi P506 One+ Lithium Ion 18V 5 1/ is better
laser guide
P506 includes a laser for precise cuts
depth of cut
P506 offers a depth of cut of 1-9/16 inches
advanced features
P506 has enhanced usability for professionals
Overall score
Specifications
| Spec | Ryobi One P505 18V Lithium Ion Cordless 5 1/2" | Ryobi P506 One+ Lithium Ion 18V 5 1/ |
|---|---|---|
| Battery Compatibility | 18V ONE+ | 18V ONE+ |
| Laser Guide | No | Yes |
| Cutting Depth | 1.5 in | 1.5625 in |
| Bevel Adjustment | 50 degrees | 50 degrees |
| Weight | Light | Heavier |
Dimension comparison
Overview of the Products
When comparing the Ryobi One P505 and the Ryobi P506, price and functionality stand out as key differentiators. The Ryobi P505 is priced at $44.89, making it about 17% cheaper than the Ryobi P506, which retails for $69.00. Both models are part of the Ryobi ONE+ system, which means they work with the same 18-volt batteries, allowing users to choose either model based on their budget and specific needs for a circular saw.
Design and Build Quality
The Ryobi P505 features a GripZone overmold on its handles, enhancing grip and comfort during use. This ergonomic design allows for better handling, particularly in challenging conditions. Meanwhile, the P506 also includes the GripZone feature, but it goes a step further with an integrated laser guide for enhanced cutline visibility. While both tools are designed for portability and ease of use, the P506's additional laser guide may appeal to users who prioritize precision in their cuts.
Cutting Performance
Both saws operate at an impressive 4,700 revolutions per minute, ensuring efficient cutting through various materials. The Ryobi P505 boasts an adjustable bevel that can be set to 50 degrees, allowing for diverse cutting angles. In contrast, the P506 also supports angled cuts up to 50 degrees and provides a depth of cut of 1-9/16 inches. This similarity indicates that both models are capable of performing a wide range of cutting tasks, though the P506's laser guide may provide an edge in terms of accuracy.
Portability and Usability
The Ryobi P505's cordless design allows users to tackle projects throughout their property without being tethered to an outlet. This model weighs less and relies on Ryobi's 18V batteries, which are compatible with multiple tools in the ONE+ system. Although the P506 is also cordless and compatible with the same battery lineup, it is slightly heavier due to its added features. Users might lean towards the P505 for simple DIY tasks, while the P506 may be better suited for those who require more advanced features for precision work.
Additional Features
While both circular saws share fundamental features, the P506 offers unique advantages. The P505 does not include a laser guide but has a transparent lower guard for visibility while cutting. The P506, however, incorporates a laser guide that enhances cutting accuracy. Additionally, both models come with a blade and a blade wrench, but the P506’s features may justify its higher price for users seeking greater precision.
Target Audience
The Ryobi P505 is designed for budget-conscious DIYers or homeowners who need a reliable tool for general woodcutting tasks. Its lower price point makes it an attractive option for those who may not require advanced features. Conversely, the P506 targets users who prioritize precision and are willing to invest more for additional capabilities. This model may appeal to professionals or serious hobbyists who need more than just basic functionality.
Price Comparison
The Ryobi P505 is available for $44.89, while the Ryobi P506 is priced at $69.00. This difference of $24.11 highlights a significant price gap, making the P505 the clear choice for those on a tighter budget. However, users should consider the value added by the P506’s laser guide and enhanced usability. The P506 is approximately 54% more expensive than the P505, and potential buyers should weigh whether the additional features justify the higher cost.
Which should you buy?
Deciding between the Ryobi One P505 and the Ryobi P506 ultimately depends on your specific needs and budget. If you are looking for an economical, straightforward circular saw for general tasks, the P505 is an excellent choice at $44.89. However, if you require enhanced cutting precision and are willing to spend more, the P506 with its laser guide may be worth the investment at $69.00. Consider your typical projects and whether the additional features of the P506 align with your requirements before making a final decision.

