The Best 20 V Cordless Circular Saw
Our research reveals top 20V cordless circular saws based on expert review consensus and verified buyer feedback. Compare motor, blade, battery, ergonomics to find the perfect saw for your construction or DIY projects
By Michelle Mendoza
Updated September 12, 2026
Whether you are framing a deck, cutting plywood, or remodeling, a 20 V cordless circular saw offers the perfect blend of portability and power to tackle any tasks.
As battery technology evolves, these tools can contend with corded counterparts, providing card-like cuts on worksites without being tied to an outlet.
To help you choose the best 20 V cordless circular saw for your workshop, our team evaluated specifications, analyzed expert reviews, and scrutinized verified buyer ratings to find the clearest options.
The result is a curated list of top models, each awarded a BP Score based on consistent criteria. Keep reading for our top picks, a detailed buying guide and answers to your most common questions.
Our research covers every factor you care about: motor type, blade diameter, bevel, and flexibility, whether you are a DIY weekend warrior or a professional contractor. Below you’ll find the picks, sorted by overall value.
The guide that follows will break down the important decision factors.
| Award | Product | BP Score About BP ScoreThe BP Score is our own rating from 0 to 10, based on performance, design and build, ease of use, and value. It reflects independent research and is never influenced by manufacturers, retailers, or affiliate commissions. Learn more › | Price | |
|---|---|---|---|---|
| Best Overall |
SXBSXB 7-Inch Brushless Circular Saw for Dewalt
|
9.9/10 | $86.99 | Buy |
| Best Value |
DEKOPRO 20V 6-1/2-Inch Cordless Circular Saw
|
9.9/10 | $89.99 | Buy |
| Best Budget |
BLACK+DECKER BDCCS20B 5-1/2" Cordless Circular Saw
|
9.8/10 | $74.99 | Buy |
| Best Premium |
DEWALT DCS391B 20V 6-1/2-Inch Circular Saw
|
9.8/10 | $159.00 | Buy |
SXBSXB 6-Inch Cordless Circular Saw
|
9.7/10 | $56.99 | Buy | |
DEWALT DCS571B 4-1/2-Inch Circular Saw
|
9.7/10 | $134.00 | Buy | |
CRAFTSMAN CMCS500B 6-1/2" Cordless Circular Saw
|
9.5/10 | $84.99 | Buy | |
DEWALT DCS590B 7-1/4 in. Circular Saw
|
9.4/10 | $178.00 | Buy |
SXBSXB 7-Inch Brushless Circular Saw for Dewalt
This bare-tool circular saw works with Dewalt 20V batteries, offering a brushless motor and 8000 RPM for efficient cutting. It includes two blades and accessories, with a 0-45° bevel range for versatile cuts. Ideal for those already invested in the Dewalt battery platform.
Pros
- Brushless motor for longer runtime and less maintenance
- High 8000 RPM speed for fast cuts
- 0-45° bevel adjustment for angled cuts
- Compatible with Dewalt 20V batteries (DCB200 series)
- Includes two 7-inch blades, parallel guide, and safety gear
Cons
- Battery and charger not included (bare tool)
DEKOPRO 20V 6-1/2-Inch Cordless Circular Saw
This cordless circular saw offers a 4500 RPM no-load speed and a 6.5-inch carbide-tipped blade for efficient cutting across hardwood and softwood. Its ergonomic handle reduces fatigue, while the adjustable bevel and laser guide aid precision for DIYers and worksite tasks.
Pros
- Powerful cordless performance
- Laser guide for accurate cuts
- Comfortable ergonomic handle
- Adjustable bevel for versatility
- Comes with two batteries and charger
Cons
- Heavier than some cordless models
- Limited to 6.5-inch blade size
BLACK+DECKER BDCCS20B 5-1/2" Cordless Circular Saw
This compact circular saw from BLACK+DECKER is ideal for DIYers who need a versatile tool for quick cuts around the house. Its tool-free adjustments and 5-1/2 inch blade make angled cuts and depth changes easy, and the PowerConnect battery system adds convenience.
Pros
- Tool-free depth and blade adjustments
- Pivoting shoe for extra control
- Compact and lightweight design
- High torque motor for cutting power
- Compatible with PowerConnect battery system
Cons
- Battery not included, bare tool only
- Limited to 5-1/2 inch blade size
DEWALT DCS391B 20V 6-1/2-Inch Circular Saw
This cordless sidewinder circular saw combines a 5150 RPM motor with a lightweight magnesium shoe for durability and precise cuts. Its 0-50 degree bevel capacity and keyless blade change make it a versatile choice for demanding woodworking and construction tasks, though the battery is sold separately.
Pros
- Powerful 5150 RPM motor for demanding cuts
- Lightweight magnesium shoe for durability and accuracy
- Comfortable rubber over-molded grip for control
- Keyless blade change with spindle lock for convenience
- Wide 0-50 degree bevel range for versatile applications
Cons
- Battery and charger not included
- Limited cut depth of 2-1/8 inches at 90 degrees
SXBSXB 6-Inch Cordless Circular Saw
This bare-tool circular saw is designed to run on Dewalt 20V batteries, offering a brushless motor that spins up to 6900 RPM. With adjustable bevel and depth settings plus included accessories, it provides solid cutting performance for job sites and DIY projects.
Pros
- Compatible with Dewalt 20V batteries
- Brushless motor delivers up to 6900 RPM
- 0 to 45 degree bevel adjustment
- Includes two blades, guide, and safety gear
- Safety lock prevents accidental startup
Cons
- Battery and charger not included
DEWALT DCS571B 4-1/2-Inch Circular Saw
This compact circular saw from DEWALT's ATOMIC series features a brushless motor and electronic blade brake for efficient cutting. Its 4-1/2-inch blade can cut 2x material at 90 degrees and 1x lumber at 45 degrees, making it suitable for light framing and trim work. The removable auxiliary handle and onboard dust port add versatility.
Pros
- Brushless motor for efficient cuts
- Electronic blade brake for safety
- Bevels up to 45 degrees
- Onboard dust port for cleanliness
- Compact and lightweight at 6.53 lbs
Cons
- Tool only, battery and charger sold separately
- Small 4-1/2-inch blade limits cutting depth
CRAFTSMAN CMCS500B 6-1/2" Cordless Circular Saw
A bare-tool circular saw from Craftsman's V20 cordless line, this model delivers a 4200 RPM motor and a tool-free bevel shoe for up to 50-degree angled cuts. Its compact, lightweight build and metal shoe prioritize durability and user comfort. Ideal for those already invested in Craftsman's V20 system looking for a capable 6-1/2" saw for cutting framing lumber and more.
Pros
- Powerful 4200 RPM motor for fast cuts
- Tool-free bevel shoe for quick angle adjustments
- Durable metal shoe for longevity
- Compact and lightweight reduces user fatigue
- Comfortable overmolded handle
Cons
- Battery and charger sold separately
DEWALT DCS590B 7-1/4 in. Circular Saw
This cordless circular saw from DEWALT delivers high power with a brushless motor spinning up to 5,500 RPM, and its electric brake minimizes blade coasting for precise cuts. It offers a generous depth of cut up to 2-9/16 inches at 90 degrees, making it suitable for heavy-duty tasks.
Pros
- Most powerful 20V MAX circular saw
- Up to 368 cuts per charge
- Electric brake for clean cuts
- 2-9/16 in. depth of cut at 90°
- Brushless motor for efficiency
Cons
- Heavy at 9.15 lbs
- Tool only, battery and charger sold separately
Best 20 V Cordless Circular Saw Buying Guide
Motor Type: Brushless vs Brushed
The motor is the heart of a cordless saw. Brushless motors run more efficiently, deliver more torque, and maximize battery runtime. If you use the tool regularly, a brushless design is ideal.
Brushed motors are serviceable but tend to heat up and lose power over time. For maximum performance, brushless is the modern standard in high-end saws. For a deeper comparison, see our selections on best battery circular saw.
Brushless models also preserve battery in extended use, allowing users to finish more cuts per charge. Most 20V circular saws today adopt brushless motors for that durability.
Blade Diameter and Cutting Depth
The size of the blade directly impacts the depth of cut and the type of tasks you can perform.
6-1/2 inch blade can cut up to 2×6 lumber; 7-1/4 inch blade can cut deeper and handle thicker material or miter bases. If weight is a concern, a smaller blade reduces the tool profile.
For heavy work, many consider a model with 7-1/4 inch blade. Also, check the metal cutting circular saw guide if you cut metal occasionally.
Battery Compatibility and Runtime
Most 20V saws use an interlocking battery platform. If you already own a specific brand, continue for battery policy. Evaluate the battery amp-hours: larger batteries deliver longer runtime but add weight. For all-day use, high capacity is best.
If you need guidance, read our best compact circular saw overview.
Also consider whether the tool is sold as bare (tool only) or includes battery and charger. If starting fresh, a kit saves initial cost. Several saws here are battery-included.
Ergonomics and Weight
A comfortable handle helps control. Many users find blade placement: sidewinder vs worm-drive feel can affect fatigue. Lightweight models significantly reduce arm strain after long cuts. For great balance and stylish care, best lightweight circular saw page offers details.
The weight of the lens ~ 6 to 8 lb with battery is optimal for many. >
Safety and Bevel Adjustments
Look for electric brake, lock-off switch, and clear lower guard retraction. Bevel capacity most models achieve 0, 51 degree tilt for spinning. Saw adjustments make the overall process safer. To learn basics, best circular saw for beginners is a good resource.
Why You Should Trust Us
BestProducts reviews are independent and evidence-based. We analyze each product on consistent metrics, and we assign a BP Score from 0 to 10 based on research. No product trials given. We do not conduct own product trials.
Our evaluations are grounded in research, published data and expert review, and verified buyer feedback. This transparency ensures our recommendations are reliable and neutral.
We also closely compare five product data: motor, battery and blade. Our editorial team is not affiliated with any brand, so advice is unbiased.
Final Thoughts
Best Overall: DEKOPRO 20V Cordless Circular Saw achieves top BP Scores plus in our class, offering a 6-1/2 blade.
Best Universal Battery: SXBSXB 7-Inch Brushless Circular Saw works perfectly on Dewalt 20V and offers high RPM for cutting.
Best Value: Black+Leaf 20V 5-1/2 is a budget pick.
Best Compact: DEWALT 20V 4-1/2 ATOMIC is easy to handle.
Frequently Asked Questions
Which blade size is best for 20V saws?
6-1/2 inches is typical. For deeper cutting 7-1/4 inch blade yields more depth but heavier weight. Consider heaviness. 6-1/2 provides a compact tool.
Should I buy brushless or brushed?
Brushless is more efficient, durable, and delivers longer runtimes. Brushes wear but initial cost is lower, but difficult time.
Can I use third-party batteries?
Some saws brand specify only original; but third-party categories exist with less hazard. Not recommended for optimum work.
Are 20V circular saws capable of horizontal?
Yes, they cut wood, plywood. For any thick metal may require special metal cutting circular saw approach. 80% of work is construction.
How long does a battery last?
Depending on capacity, 4Ah battery lasts around 50-80 cuts across 2×4 lumber. Battery type influences attitude.
About the author
Michelle is BestProducts's saw writer, weighing cut accuracy, blade quality, dust control, and safety features. She helps woodworkers get clean, repeatable cuts at every budget.