DEWALT DCS378B Saw
- Saw
- 8 inches
- 535 watts
- Battery
- Better rated than 85%
A 20V DEWALT saw with a 535 watt motor and 8 inch cutting capacity for portable metal cutting. Best value if you already own 20V MAX batteries.
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How it ranks among the 265 saws we track
4.8★ across 256 Amazon ratings, Bayesian-smoothed toward the category average.
256 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
100+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 265 saws we track - how the scorecard works · full saws data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The DEWALT DCS378B is a 20V cordless saw with a 535 watt motor and 570 RPM blade speed, built with an alloy steel construction and an 8 inch cutting capacity.
DEWALT's 20V MAX platform covers everything from drills to saws, and the DCS378B slots in as a battery-powered cutting tool rated for 570 RPM. The 8 inch capacity figure and alloy steel build point to a saw meant for cutting metal stock such as pipe or rod rather than framing lumber. As with most bare-tool DEWALT listings, the battery and charger are typically sold separately.
- 20V MAX cordless power source
- 535 watt motor rated output
- 8 inch cutting capacity
- 4.8 rating across 256 reviews
Who it's for
This fits tradespeople and DIYers already invested in the DEWALT 20V battery system who need a portable saw for metal cutting jobs. It is not the right pick for someone starting from zero on batteries, since none is confirmed included in this listing.
Strengths and trade-offs
Drawn from this product's published specifications.
- Runs on DEWALT 20V MAX batteries
- 535 watt motor for portable cutting
- Alloy steel construction
- Battery and charger not confirmed included
- 570 RPM is slow versus a circular saw
- 8 inch capacity limits larger stock
Performance notes
A 535 watt motor spinning at 570 RPM is a low, steady speed compared to a circular saw, typical of a cutting tool built for control over metal rather than raw speed through wood. The alloy steel build adds durability for repeated cuts on site. The 8 inch capacity sets the upper limit on stock diameter or width this saw can handle in one pass.
Specifications
| Brand | DeWalt |
|---|---|
| Model | DCS378B |
| Capacity & performance | |
| Capacity | 8 inches |
| Speed | 570 rpm |
| Power & efficiency | |
| Motor Power | 535 watts |
| Power Source | Battery |
| Voltage | 20 volts |
| Construction & materials | |
| Material | Alloy Steel |
Other DeWalt saws
How it compares
This product against the closest alternatives we track in saws.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| DEWALT DCS378B SawThis product | 4.8 / 5 | 256 | 4.2 / 5 |
| SKIL 5280-01 SawSkil | 4.7 / 5 | 14,300 | 4.6 / 5 |
| DEWALT DCS391B SawDeWALT | 4.6 / 5 | 11,000 | 4.5 / 5 |
| Milwaukee 2719-20 SawMILWAUKEE | 4.8 / 5 | 6,485 | 4.5 / 5 |
| BLACK+DECKER BDEJS600C SawBLACK+DECKER | 4.7 / 5 | 11,123 | 4.5 / 5 |
Similar saws from other brands
Questions about the DeWalt DCS378B
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the DEWALT DCS378B come with a battery?
This listing describes it as battery powered on the DEWALT 20V platform, but bare-tool DEWALT saws typically ship without a battery or charger, so check the listing before ordering.
What is the cutting capacity of the DEWALT DCS378B?
It is rated for an 8 inch capacity according to the listing specs.
How fast does the DEWALT DCS378B cut?
Its motor runs at 570 RPM, a speed suited to controlled cuts rather than fast lumber ripping.