DEWALT DCS391B Saw Review
Our verdict
The DEWALT DCS391B is the most in-demand circular saw in this lineup, with 11,000 reviews at 4.6 stars and 2,000 units bought last month. Its 20V MAX platform and 5100 RPM blade speed make it the default recommendation for anyone shopping cordless circular saws.
Check price on AmazonBest for
Anyone already running DEWALT 20V MAX tools, or buyers who want the most proven and widely purchased cordless circular saw in the market.
Skip if
You need a full-size 7.25-inch blade for heavy framing, or you prefer a corded saw for maximum sustained power without battery management.
- Power Source Battery Powered
- Voltage 20 Volts
- Speed 5100 RPM
- Weight 3.16 Kilograms
- Material High Speed Steel
- Capacity 6.5 Inches
Our scorecard
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Owner rating4.6/5
4.6 average across 11,000 owner ratings
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Popularity4.9/5
11,000 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other power tools and workshop machinery we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
The DEWALT DCS391B runs on the DEWALT 20V MAX battery platform and spins a 6.5-inch high-speed-steel blade at 5100 RPM. The item weight is 3.16 kilograms. No motor wattage is published in the listing specs. This is a tool-only purchase that relies on the buyer's existing 20V MAX battery stock.
The numbers behind this saw are exceptional for the category. 11,000 owner reviews at 4.6 stars and 2,000 units bought last month put the DCS391B in its own tier by demand and track record. No other saw in this batch comes close on review volume or recent sales velocity, which makes it the straightforward choice for buyers who are undecided.
Based on specs and verified owner reviews, the 5100 RPM blade speed is the highest figure among any saw in this batch, giving it a performance edge for fast rip cuts and crosscuts through dimensional lumber. The $129.00 price is strong value given the depth of the DEWALT 20V MAX ecosystem.
Pros
- 5100 RPM is the highest blade speed in this batch
- 11,000 reviews at 4.6 stars is the strongest combined demand and quality signal here
- 2,000 units bought last month confirms it is the top-selling saw in this group
- 20V MAX platform offers the broadest DEWALT battery compatibility
- $129.00 is competitive pricing for a 6.5-inch 20V cordless saw
Cons
- Tool-only listing adds cost if you are not already in the DEWALT 20V ecosystem
- 6.5-inch blade is smaller than a full-size 7.25-inch saw for heavy structural framing
- Motor wattage is not published in the listing specs
Specifications
| Power Source | Battery Powered |
|---|---|
| Voltage | 20 Volts |
| Speed | 5100 RPM |
| Weight | 3.16 Kilograms |
| Material | High Speed Steel |
| Capacity | 6.5 Inches |
Performance notes
Battery powered 20V MAX platform. Blade speed is 5100 RPM with a 6.5-inch high-speed-steel blade. Item weight is 3.16 kilograms. No motor wattage is listed in the published specs.
What buyers say
Owners consistently praise the DCS391B for its speed, reliability, and seamless fit into their existing DEWALT battery fleet. The most common complaint is that the tool-only bundle raises the total entry cost for buyers new to DEWALT who need a battery and charger as well.
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Frequently asked questions
Does the DEWALT DCS391B come with a battery?
No, it is a tool-only listing. You need a compatible DEWALT 20V MAX battery and charger, sold separately.
What is the blade speed of the DCS391B?
The listed specs show 5100 RPM.
Need help comparing the DCS391B to another saw?
Email us at hello@toolgalaxy.com.