Corded vs Cordless Circular Saw: Pros and Cons (2025)

A circular saw is one of the most versatile tools in any workshop or job site — but should you go corded or cordless? Both have real advantages depending on where and how you work. This comparison pits the DEWALT DWE575SB (corded) against the DEWALT DCS391B (cordless) to help you make the right call.

The Short Answer

• Choose corded if: You work primarily in a workshop or garage with easy access to power outlets, tackle heavy-duty cutting tasks regularly, and want maximum consistent power without worrying about battery life.
• Choose cordless if: You work on job sites, outdoors, or in spaces without easy outlet access, and value the freedom to move without a cord getting in the way.

Brand/Product Overview

DEWALT DWE575SB (Corded) Overview

The DEWALT DWE575SB is a 7-1/4 inch corded circular saw that has become a benchmark in the mid-range segment. Powered by a 15-amp motor, it delivers consistent, unwavering power for ripping through dimensional lumber, sheet goods, and engineered materials. At just 8.8 pounds, it is one of the lighter corded saws on the market, making it easier to handle on extended cutting sessions.

The DWE575SB features a lightweight magnesium shoe for improved accuracy and a dust blower that keeps the cut line clear. It is a workhorse built for both professionals and serious DIYers who spend a lot of time making cuts.

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DEWALT DCS391B (Cordless) Overview

The DEWALT DCS391B is an 18V cordless circular saw from the DEWALT 20V MAX system (note: 20V MAX is the peak voltage; working voltage is 18V). It uses a 6-1/2 inch blade and a 460 MWO motor that provides solid cutting power for most framing, decking, and trim work. The DCS391B is sold as a bare tool, meaning you need an existing 20V MAX battery to run it.

Weighing in at 7.2 pounds without a battery, it is nimble and easy to carry across a job site. The 50-degree bevel adjustment and clear sightlines to the cut line make it a practical choice for everyday cutting tasks.

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Head-to-Head Comparison

Power and Cutting Performance

| Metric | DWE575SB (Corded) | DCS391B (Cordless) | |---|---|---| | Power Source | 15-Amp AC | 18V Battery | | Blade Size | 7-1/4 inch | 6-1/2 inch | | No-Load Speed | 5,200 RPM | 5,150 RPM | | Max Cutting Depth (90°) | 2-1/2 inch | 2-1/4 inch | | Max Bevel | 57 degrees | 50 degrees |

The corded DWE575SB wins on raw power and sustained performance. A 15-amp motor never throttles down — it delivers full power on the first cut and the hundredth. The larger 7-1/4 inch blade also cuts deeper, which matters when cutting thicker stock. The cordless DCS391B holds up admirably for framing and general cuts but can slow down when pushing through dense hardwood or making repeated cuts in quick succession. Winner: DWE575SB (Corded) — unmatched sustained power and deeper cutting capacity.

Portability and Convenience

The DCS391B is the clear winner here. Without a cord to manage, you can move freely around a workpiece, carry the saw up a ladder, or work at the far end of a job site without hunting for an outlet or running extension cords. Cord management is a real fatigue factor on large projects.

The DWE575SB requires access to power and introduces cord management as a task in itself. On large decks or framing projects, constantly repositioning around a cord slows you down. Winner: DCS391B (Cordless) — freedom of movement is a genuine productivity advantage.

Cost and Ongoing Expenses

The DWE575SB typically costs $80-$100 and is ready to use out of the box. The DCS391B bare tool runs $90-$110, but you must add a 20V MAX battery ($60-$100 for a quality 5Ah pack) and charger ($30-$40) if you do not already own them, bringing the total to $180-$250.

However, if you already own DEWALT 20V MAX batteries from other tools, the DCS391B is a cost-effective addition. Winner: DWE575SB (Corded) — lower total cost of ownership for new buyers without an existing battery platform.

Best Use Cases

The corded saw excels in stationary setups — a workshop, garage bench, or any location with power access. It is ideal for high-volume cutting of sheet goods, ripping lumber, or any task requiring sustained heavy-duty performance.

The cordless saw is purpose-built for job sites, renovation work, outdoor projects, and anywhere mobility matters. For finish carpentry, decking, or roofing work, the ability to move freely is invaluable. Winner: Depends on use case — corded for shop work, cordless for field work.

Which Should You Buy?

Choose the DEWALT DWE575SB (Corded) if:

• You work primarily in a garage, workshop, or near power outlets
• You cut dense materials or make high volumes of cuts in a session
• You want the best power-to-price ratio without battery expenses
• Extension cord management is not a concern in your workspace

Choose the DEWALT DCS391B (Cordless) if:

• You work on job sites, outdoors, or in spaces without easy outlet access
• You already own DEWALT 20V MAX batteries from other tools
• Portability and freedom of movement are priorities for your projects
• You need to carry the saw to elevated areas or across large distances

Frequently Asked Questions

Is a cordless circular saw as powerful as a corded one? For most DIY and light professional tasks, modern cordless saws like the DCS391B deliver adequate power. For sustained heavy-duty cutting — ripping long sheets of plywood or cutting dense hardwood repeatedly — a corded saw maintains consistent power better.

What size blade does each saw use? The DWE575SB uses a 7-1/4 inch blade, while the DCS391B uses a 6-1/2 inch blade. The larger blade provides a deeper cutting capacity.

Can I use any circular saw blade in these saws? Both saws accept standard blades of their respective sizes (7-1/4 inch and 6-1/2 inch). Make sure any blade you buy matches the arbor size (5/8 inch for both DEWALT models).

How long does a DEWALT 20V MAX battery last when cutting? With a 5Ah battery, the DCS391B can typically make 100-200 cuts through 2x4 lumber. Runtime depends heavily on the material being cut and the depth of cut.

Bottom Line

The corded DEWALT DWE575SB and cordless DCS391B are both excellent saws built to DEWALT's high standards — the choice comes down to where and how you work. The corded model delivers unbeatable consistent power and value for shop and garage use. The cordless model wins on flexibility and portability for job sites and outdoor projects. If you work near power outlets, go corded for better value and power; if you need to move freely, invest in the cordless model.

For more circular saw options, see our full roundup of the best circular saws for DIY.

Last updated: March 2025. Prices subject to change. As an Amazon Associate we earn from qualifying purchases.