Milwaukee M18 Cordless Lithium-Ion 6-1/2" Circular Saw - vs Ryobi P506 One+ Lithium Ion 18V 5 1/
Updated July 2026 — Milwaukee M18 Cordless Lithium-Ion 6-1/2" Circular Saw - wins on price and weight, Ryobi P506 One+ Lithium Ion 18V 5 1/ wins on sales rank and rpm.
The Milwaukee saw offers superior durability and cutting power, making it a better choice for heavy-duty tasks, while the Ryobi is more budget-friendly.
Why Milwaukee M18 Cordless Lithium-Ion 6-1/2" Circular Saw - is better
Cutting Power
Milwaukee delivers 3,500 RPM for tough materials.
Build Quality
Constructed with magnesium for superior durability.
Versatility
Ideal for a wide range of applications.
Why Ryobi P506 One+ Lithium Ion 18V 5 1/ is better
Price
Ryobi is $25 cheaper.
RPM
Ryobi has a higher RPM of 4,700.
Weight
Ryobi is lighter and easier to handle.
Overall score
Specifications
| Spec | Milwaukee M18 Cordless Lithium-Ion 6-1/2" Circular Saw - | Ryobi P506 One+ Lithium Ion 18V 5 1/ |
|---|---|---|
| Motor Power | 3500 RPM | 4700 RPM |
| Build Material | Magnesium | Plastic |
| Ergonomics | Soft-grip | GRIPZONE |
| Battery System | M18 | RYOBI ONE+ |
| Cut Depth | 2.5 inches | 1.56 inches |
Dimension comparison
Overview of the Products
When comparing the M18 Cordless Lithium-Ion 6-1/2" Circular Saw from Milwaukee and the Ryobi P506 One+ Circular Saw, both tools cater to users looking for cord-free convenience. The Milwaukee model, priced at $94.00, offers robust cutting power at 3,500 RPM, while the Ryobi saw is available for $69.00 and boasts a higher RPM of 4,700. This price difference of about 17% makes the Ryobi a more budget-friendly option, but it also raises questions about performance and features.
Cutting Power and Performance
The Milwaukee saw delivers 3,500 RPM, which is adequate for various cutting tasks, especially when dealing with tough materials like LVL headers. Its powerful motor ensures quick and efficient cuts, making it a reliable choice for professionals. On the other hand, the Ryobi P506 has a maximum RPM of 4,700, allowing for faster cuts. The enhanced cutline visibility provided by the integrated laser guide also aids in achieving precise cuts. Users who prioritize speed may find the Ryobi's higher RPM beneficial.
Build Quality and Design
In terms of build quality, the Milwaukee saw is constructed with magnesium upper and lower guards, ensuring superior durability and blade protection. This robust design makes it ideal for heavy-duty use. The soft-grip handle further enhances user comfort and control during operation. Conversely, the Ryobi saw features a GRIPZONE overmold for optimal grip and comfort but does not emphasize the same level of rugged durability as the Milwaukee. Those looking for a tool that can withstand tough job site conditions might lean towards the Milwaukee model.
Ergonomics and User Comfort
Both saws prioritize user comfort, but they achieve this through different designs. The Milwaukee's ergonomic soft-grip handle is designed for superior balance and control, facilitating longer usage without discomfort. In contrast, the Ryobi's GRIPZONE overmold provides a secure hold, which is especially important during angled cuts. While both tools are designed with user comfort in mind, the Milwaukee’s focus on balance and control may appeal more to users who engage in extended cutting tasks.
Versatility and Applications
The Milwaukee circular saw is touted as highly versatile, suitable for plumbing, electrical, framing, finishing, and carpentry tasks. Its powerful motor and durable design allow it to handle a wide range of materials. The Ryobi saw also offers versatility, with a 50-degree bevel cut capacity and compatibility with all RYOBI 18-Volt ONE+ System batteries. However, its smaller blade size of 5-1/2 inches compared to the Milwaukee's 6-1/2 inches may limit its capability for larger cuts. Those needing versatility for various applications might find the Milwaukee a better fit.
Battery and Power System
Both tools are sold as bare tools, meaning they do not include batteries or chargers. The Milwaukee saw is part of the M18 system, while the Ryobi saw is compatible with the extensive RYOBI ONE+ 18-Volt system. The latter's compatibility with all RYOBI batteries means users can interchange batteries across many tools, potentially reducing the overall investment in power systems. However, the Milwaukee's M18 system is also well-regarded, ensuring a reliable performance for those who already own compatible batteries.
Sales Rank and Market Performance
The Milwaukee saw has a sales rank of 17,973, positioning it well within its category, indicating a solid demand among users. In comparison, the Ryobi P506 has a higher sales rank of 100,142, suggesting it is less popular among buyers. This difference may reflect user preferences for quality and performance, with the Milwaukee model being favored for its durability and cutting power. Buyers looking for a well-regarded tool may prefer the Milwaukee based on its stronger market performance.
Pricing and Value for Money
With a price of $94.00 for the Milwaukee and $69.00 for the Ryobi, the Ryobi is the more economical choice, costing about 17% less. However, the distinction in price reflects differences in performance and durability. While the Ryobi offers higher RPM and is suitable for lighter tasks, the Milwaukee provides a more robust design and superior cutting capabilities. Consumers must weigh the value of lower upfront costs against the potential long-term benefits of investing in a higher-quality tool.
Which should you buy?
Choosing between the Milwaukee M18 Cordless Lithium-Ion 6-1/2" Circular Saw and the Ryobi P506 One+ Circular Saw ultimately depends on your specific needs. If you prioritize cutting power, durability, and ergonomic design for extensive tasks, the Milwaukee is the better option despite its higher price. However, if you seek a more budget-friendly tool with decent performance for lighter applications, the Ryobi could serve you well. Consider your usage requirements and budget to make an informed decision.

