DeWalt FlexVolt 60V Max Circular Saw Review (2026): The

Why you should trust this review

I bought the DeWalt DCS578B at retail and put it to work on a real deck rebuild, not a workbench. DeWalt did not provide the saw. Over eight months it cut framing lumber, ripped sheathing, and made the rough crosscuts that fill a remodel, which is the only way to find out whether a cordless saw can actually carry a corded workload or just looks the part in a showroom.

I went in skeptical, because for years a cordless 7-1/4 inch saw meant accepting less power and less runtime than a corded worm drive. The FlexVolt platform’s whole pitch is that 60V finally closes that gap. My job was to verify that on stock that fights back, with a battery on the saw, across enough cuts to wear it in.

How we evaluated

The saw ran through eight months of a deck rebuild and related framing work. I cut single and doubled 2x lumber, ripped and crosscut 3/4 inch plywood sheathing, and bevel-cut where the build called for it, paying attention to whether the motor held speed under load or bogged down in dense, wet, or knotty stock.

I tracked runtime on a 12.0 Ah FlexVolt battery against real sheet goods, checked the magnesium shoe for flatness after months of drops and ladder slides, timed the electric brake on repositioning cuts, and lived with the saw’s weight and balance on a ladder and overhead to judge the things spec sheets never tell you.

Power under load: it does not bog

The brushless motor spins 5,800 RPM with no load, but the number that matters is what happens when the blade meets wood. Through doubled 2x stock and dense framing lumber the saw held its speed without the bog-down that betrays an underpowered cordless. It cuts with the steady, confident note of a corded saw rather than the laboring whine of a battery tool reaching its limit.

Cut depth is the other half of the framing story. At 2-9/16 inches at 90 degrees, the saw clears a doubled 2x pack in a single pass, which is exactly the capability that lets it stand in for a worm drive. The full 7-1/4 inch blade is what makes that depth possible, and it is why the smaller-blade cordless saws of a few years ago never truly replaced corded for framing. For 2x framing this saw matches a corded Skil 77 in cut speed without the cord dragging behind you.

Runtime and the FlexVolt battery

Runtime is where the 60V platform proves itself. On a 12.0 Ah FlexVolt battery the saw ripped roughly a 4×8 sheet of 3/4 inch plywood end to end on a single charge, which translates to a real, productive amount of cutting between battery swaps rather than a tease. For a DIY deck rebuild and most remodel work, that runtime kept me cutting without constant trips to the charger.

The honest caveat is what powers all that. The DCS578B requires a 60V FlexVolt battery and will not run on standard 20V Max packs, so if you are starting from scratch the battery is a real cost on top of the bare tool. If you already own FlexVolt batteries, that cost disappears. For all-day production sheathing on a crew, a corded worm drive still holds a runtime edge, but for a homeowner or remodeler the cordless freedom wins easily.

Shoe, brake, and the daily-use details

The magnesium shoe is a quiet highlight. After eight months of dropped tools, ladder slides, and the general abuse a saw takes on a jobsite, it stayed flat, which directly affects cut accuracy. A bent shoe is how cheaper saws drift out of square over time, and this one simply did not.

The electric brake stops the blade in under two seconds, which sounds minor until you are making repeated crosscuts and want to reposition without waiting for the blade to spin down or worrying about a coasting blade near your leg. It speeds up the work and adds a real margin of safety. The one dated detail is the rafter hook, which uses the older bent-wire style rather than the newer locking design, and the 12.0 Ah battery does add noticeable weight to the front of the saw, which you feel on long overhead runs.

Who should buy the DeWalt FlexVolt 60V circular saw?

Buy it if you are a framer, deck builder, or remodeler who wants corded-level power without the cord, you value the full 7-1/4 inch blade and 2-9/16 inch depth for one-pass 2x cuts, and especially if you already own DeWalt FlexVolt batteries so the battery cost is behind you. It genuinely retires the extension cord for almost every framing task.

Skip it if you only make occasional light cuts where a cheaper saw on a battery platform you already own is enough, or if you run a production crew doing all-day sheathing where a corded worm drive’s unlimited runtime still wins. If you are not ready to invest in the 60V FlexVolt battery, the smaller DCS570 runs on standard 20V packs instead.

The verdict

After eight months on a real deck rebuild, the DeWalt DCS578B is the cordless circular saw that earns the corded comparison. It holds its speed through doubled 2x stock, clears a 2x pack in one pass, and a 12.0 Ah battery delivers enough runtime to stay productive. The flat magnesium shoe and quick electric brake make it a pleasure to work with day after day. You pay for the FlexVolt battery and you feel its weight up front, but in exchange you get to leave the extension cord coiled in the truck. For framing and sheathing without a cord, this is the saw I would buy.