Model#: DEWNDCS391B

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Brand new items;Full manufacturer warranty available
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New items with possible minor cosmetic damage; CPO 120 day money back guarantee
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Dewalt DCS391B 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw (Tool Only)

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  • Note: Battery & Charger sold separately
New $129.00
Recon $99.00
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Product Overview


The DCS391B 20V MAX 6-1/2 in. Circular Saw with a 6-1/2 in. carbide tipped blade operates on a powerful 5150 RPM motor with a 0 to 50-degree bevel capacity on a lightweight and durable magnesium shoe.
  • Powerful 460 MWO, 5,150 RPM motor delivers power and speed to make the most demanding cuts with ease
  • Optimized rubber overmolded comfort grip delivers optimal balance and control
  • 6-1/2 in. carbide-tipped blade for cutting 2 times material at 90-deg. and 45-deg. and more cuts per charge
  • High strength and lightweight magnesium shoe provides jobsite durability for long-term cut accuracy
  • 0-50-deg. bevel capacity allows for aggressive bevel cuts for a multitude of applications
  • 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw - DCS391B
  • Tool Only - Batteries and Charger Sold Separately
Compliance and Restrictions
warning: This product can expose you to Lead, which is known to the State of California to cause Cancer and Birth Defect/Reproductive Harm. For more information go to


Cordless: Yes
Length: 8.5 in.
Width: 15.5 in.
Height: 10.5 in.
Weight: 7 lbs.
Arbor Size: 5/8 in
Batteries Included: 0
Battery System: 20V MAX
Battery Type: Li-Ion
Bevel Capacity: 0-50 degrees
Blade Diameter: 5-1/2 in
Blade Position: Left
Bluetooth Compatibility: No
CSA Safety: No
Case Included: No
Charger Included: No
Depth Adjustment: No
Depth of Cut (45 Degrees): 2in x 8 in
Depth of Cut (90 Degrees): 4 in x 6 in
ETL Safety: No
Keyless/keyed Blade Change: Keyed Change
Motor Type: Brushed
No-Load Speed (SFM): 3700
Power Source: Cordless
UL Safety: No
Voltage: 20V
Wifi compatibility: No



4.7 / 5.0
128 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (94)
No, I would not recommend this to a friend (1)
Easy To Use (90)
Powerful (82)
Value (11)
Lightweight (10)
Lack of Power (2)
Not Durable (1)
Loud (1)
Short Run Time (if applicable) (1)
Best Uses
Home Repair (61)
Small Projects (10)
Frequent Use (6)
Jobsite (6)
Great tool for diyers
I bought this a year ago and have been very happy with the usefulness of this saw.
I wish I went with the 7.5” saw but the 6.5” has worked well.
This review was collected as part of a promotion
June 26, 2019
Originally posted at
Most used tool
I use and abuse the Dewalt skill saw not like it was intended for but it keeps on going.
This review was collected as part of a promotion
June 26, 2019
Originally posted at
Light weight and powerful
Got this for Christmas it has all the power to rip a 8 foot 4x4 with out any stalls
This review was collected as part of a promotion
June 25, 2019
Originally posted at
Great for small projects
Very handy for small projects around the house. I paired with a 4ah battery and it lasted for the whole day
This review was collected as part of a promotion
June 25, 2019
Originally posted at
Easy to handle.
I like this saw because it is light weight and easy to handle. It's well built, and so convenient, being cordless.
May 24, 2019
Originally posted at
Best Uses
Home Repair
I am very happy with my purchase.
May 23, 2019
6 months ago
Describe Yourself:
Avid Do-it-Yourselfer
Light and easy-to-use
I bought this saw to replace my Dad's old saw from the 70s what a difference.
May 15, 2019
Originally posted at
Has done everything and more
I have a small shop in my garage and I couldn't be happier. With a 4 amp hour battery*, I can work on a project and never have to worry about losing power. Saw cuts well and nimble too. I love this tool almost as much as the Dewalt jig saw I bought!!

*battery purchased separately
May 2, 2019
Originally posted at
Great tool
I have used this tool a lot over the last year since i bought it. I am very happy with the tool the only thing that I would have to make known is that when using this tool make sure that you are using a stronger longer lasting battery. If you don't then it binds up with simple cuts.
March 22, 2019
Originally posted at
6 1/2 in 20 volt circular saw
Light, quick, and great for small jobs
February 17, 2019

Questions & Answers

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Browse 23 questions Browse 23 questions and 36 answers
Does this saw include the blade?
John on Apr 19, 2016
BEST ANSWER: Yes, it comes with a framing blade.
Will 1.5 amp batteries run this saw or do you need 3amp?
hydro on Apr 6, 2016
BEST ANSWER: Yes, the 1.5 ah 20v Max batteries will work on Dewalt model dcs391b. It is recommended to use the 3.0 ah or larger batteries due to power consumption.
Can you change the depth of the blade with this saw?
Ryan B on Apr 3, 2017
BEST ANSWER: Yes, it is infinitely adjustable. It is just a quick turn clamp that you loosen and tighten by hand a the desired depth.
Does it come with wrench for blade?
A shopper on Oct 26, 2016
BEST ANSWER: It doesn't come with a wrench, has an allen key to remove the blade that is attached to the saw.
I have a he dewaltt DW 936 18 volt trim saw and wanted to purchase this also, but wondered if this saw is also a trim saw,nor more of a heavier duty saw.
Captain D on May 23, 2016
BEST ANSWER: That unit will be more heavy duty than a comparable trim saw.
What AMP battery should I order for the Dewalt DCS391 20V cordless saw?
James V on Jun 12, 2018
BEST ANSWER: If you plan on using the saw for a serious project where you will be doing a fair amount of cutting, you should go with the 5Ah (DCB205), or at a minimum, the 4 Ah (DCB204). Hope this helps.
Will a 20 volt 1.3ah battery work in this saw. Those are the batteries that came with my impact driver.
Captain D on May 23, 2016
BEST ANSWER: Yes, all of the 20V MAX batteries are interchangeable.
will the saw cut ipa wood successfully?
Honey on Jun 24, 2015
BEST ANSWER: Yes, it will work on IPE wood.
It came with batery and charger?
A shopper on Nov 20, 2017
BEST ANSWER: No, bare tool.
Do you ship to Maldives?

Thsnk you
Musa663 on Jun 2, 2016
BEST ANSWER: CPO only ships within the United States at this time.

New Vs. Reconditioned

What's the difference between New and Factory-Reconditioned?

Factory-Reconditioned products have been returned to the manufacturer and are restored to like-new operating condition; they go through a rigorous testing and inspection process. Plus, they offer a significant savings vs. new.
  • Reconditioned products may have minor cosmetic blemishes or scratches that do not affect item performance.
  • Reconditioned products may not come with all of the consumables the new version comes with (bits, sanding pads/papers, cases, etc.).
  • Both come with a manufacturer warranty and are covered by our Money Back Guarantee; New is 30 days, Reconditioned is 120 days.
Condition: New Factory Reconditioned
Features: Same Same
Specs: Same Same
Includes: 20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw - DCS391B,
Tool Only - Batteries and Charger Sold Separately
20V MAX Cordless Lithium-Ion 6-1/2 in. Circular Saw (Tool Only) - DCS391BR,
Tool Only - Batteries and Charger Sold Separately
Availability: In Stock In Stock
Warranty: 3 Year 1 Year
Price: $129.00 $99.00
You Save: N/A $30.00 (23%)


Most DEWALT® Tools purchased on or after January 1, 2004 come with a warranty package that includes:

Three-Year Limited Warranty. DEWALT will repair, without charge, any defects due to faulty materials or workmanship for three years from the date of purchase. This warranty does not cover part failure due to normal wear or tool abuse. For further detail of warranty coverage and warranty repair information, visit or call 1-800-4-DEWALT (1-800-433-9258). This warranty does not apply to accessories or damage caused where repairs have been made or attempted by others. This warranty gives you specific legal rights and you may have other rights which vary in certain states or provinces.

One-Year Free Service Contract. DEWALT will maintain the tool and replace worn parts caused by normal use, for free, any time during the first year after purchase.

90-Day Money Back Guarantee. If you are not completely satisfied with the performance of your DEWALT Power Tool, Laser, or Nailer for any reason, you can return it within 90 days from the date of purchase with a receipt for a full refund - no questions asked.