At a glance
The most common mistake when buying a cordless circular saw is choosing the saw before choosing the platform. If you already own four DeWalt 18V XR batteries, a Makita saw at the same score is still the wrong saw. The battery system you are building around matters more than marginal differences in specification. Get the platform question right first, then choose the saw within it.
The second question is depth. Blade size determines how deep the saw cuts, and the depth requirement splits the field cleanly. A 165mm saw cuts to 57mm. A 184mm saw cuts to 60 to 64mm. A 190mm saw cuts to 62.5 to 67mm. A 140 to 150mm compact saw cuts to 45 to 46mm. These are not interchangeable. If your work regularly involves 45mm or larger dressed timber, a compact saw is the wrong tool. If most of your work is 18 to 22mm sheet goods, a 190mm saw is more tool than the job needs. Know the thickest material you cut regularly before looking at any specific model.
How we assessed these saws. All seven saws were reviewed individually across the same criteria: specifications from official UK sources, hands-on test data from independent professional reviewers, UK trade supplier listings, and user feedback from UK buyers. Scores (1-5) cover performance, battery life, build quality, ease of use, value for money, and UK suitability. Every review article is linked below.
Quick verdict summary
Top 5 circular saws, ranked
The DCS578N took the top position in every head-to-head performance test applied. The buried-blade full-depth result of 7.7 seconds with 20 pounds of pull puts it ahead of every comparable cordless saw tested by a margin that is not close. The 190mm blade cuts to 67mm at 90 degrees: it goes through 3x framing lumber and three sheets of 3/4 inch plywood stacked where 18V saws at 60 to 64mm cannot. The FlexVolt battery auto-switches, so the same battery that powers the DCS578N at 54V slots into any 18V XR tool and runs it normally at 18V.
The honest limitation is weight: approximately 5.2kg with a 9Ah battery in use, and high shoe friction that makes ordinary cuts feel harder than they should. This is a saw for demanding structural work on a flat surface, not for overhead cutting or sustained access work. If you are already on DeWalt 18V XR and need more than the DCS570N can give, this is the step up that does not strand your existing battery investment.
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Two 18V LXT batteries running in series give 36V at 6,000rpm, faster than the corded Makita 190mm equivalent at 5,200rpm. The 190mm blade cuts to 62.5mm. The distinguishing feature beyond power is guide rail compatibility: the DHS782ZJ fits directly onto Makita guide rails without an adaptor. For a site carpenter or shopfitter who cuts sheet goods on a guide rail regularly, that direct fit matters. No additional accessories to buy or lose.
The working weight of 6.3 to 6.6kg with two batteries is the honest trade-off. On a guide rail the weight is carried by the rail. Off it, over a long day, the weight accumulates. This saw requires two 18V LXT batteries simultaneously: professionals with multiple LXT batteries already own what is needed. A Makpac Type 4 carry case is included.
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At 2.5kg with a 5Ah battery, the M12 FUEL is the lightest professional circular saw available. The 140mm blade cuts to 46mm at 90 degrees, which covers the majority of access cutting work. The use case is specific: ceiling voids, stairwell shafts, plant rooms, and overhead cuts held at arm’s length where an 18V saw is either too heavy or too large to fit. For electricians, HVAC engineers, and installers working in confined spaces regularly, the weight difference between 2.5kg and 4.5 to 5.5kg held above the head changes the sustainability of the work over a session.
The POWERSTATE brushless motor delivers 190 cuts per charge in 2×4 construction lumber with a 5Ah HIGH OUTPUT battery. The blade-left design means the sightline at 90 degrees requires practice to compensate. This is not a substitute for an 18V circular saw for general site work. It is the saw you reach for when the 18V saw cannot get into the space.
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The DCS570N 18V XR is the saw most professionals on the DeWalt platform should buy. It covers 64mm at 90 degrees, which handles standard UK construction timber and CLS without difficulty. The bevel runs to 57 degrees with positive detents at 22.5 and 45 degrees. Those detents are a quality-of-life feature that saves real time on repeated bevel cuts: one motion to the stop, no checking. The aluminium base plate is solid and slides cleanly. It weighs 4.0kg body-only.
For a professional who uses a circular saw every day on site and needs a tool that handles the full range of carpentry and construction cutting reliably and without fuss, the DCS570N is the answer. Not the fastest in maximum-demand tests. Not the most powerful. The one that consistently delivers across every standard professional task.
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The DHS680Z is the precision option in the Makita LXT range. At 3.0kg body-only it is the lightest 18V brushless saw in this comparison. The blade is on the left side of the motor, which puts the cut line in direct view for right-handed users without the motor body getting in the way. For joiners, finish carpenters, and anyone whose work involves second-fix, door hanging, and precise trim cuts, the left-blade sightline is a daily advantage. The maximum depth is 57mm, which handles CLS and standard sheet goods.
ADT (Automatic Torque Drive Technology) adjusts both speed and torque in response to load, which extends battery life on lighter cuts while maintaining cut speed under heavier demand. For construction carpentry that needs 64mm or more regularly, a 184mm or 190mm saw is the right tool. For second-fix, joinery, and trim work within the 57mm depth, the DHS680Z is the professional pick.
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Head to head comparison
| Model | Platform | Blade | Depth 90° | Weight in use | Score |
|---|---|---|---|---|---|
| DCS578N | DeWalt XR FlexVolt | 190mm | 67mm | ~5.2kg (9Ah) | 4.2 / 5 |
| DHS782ZJ | Makita LXT 36V | 190mm | 62.5mm | ~6.4kg (2x5Ah) | 4.2 / 5 |
| M12 FUEL | Milwaukee M12 | 140mm | 46mm | ~2.5kg (5Ah) | 4.2 / 5 |
| DCS570N | DeWalt XR 18V | 184mm | 64mm | ~4.75kg (5Ah) | 4.1 / 5 |
| DHS680Z | Makita LXT 18V | 165mm | 57mm | ~3.75kg (5Ah) | 4.1 / 5 |
What to look for when buying a cordless circular saw
Platform first. The battery system you buy into commits your charger and your battery investment for years. Buying a saw on a platform where you own no batteries means buying batteries and a charger on top of the saw price. If you already own DeWalt XR, Makita LXT, RYOBI ONE+, or Milwaukee M12 batteries, starting with the saws on that platform is almost always the better financial decision. The one exception: if a saw’s capability is sufficiently unique to justify the new platform cost. The Milwaukee M12 FUEL for access work has no 18V equivalent that does the same job. The DeWalt DCS578N FlexVolt extends an existing 18V XR investment rather than replacing it.
Depth second. A 165mm saw cuts to 57mm. A 184mm saw cuts to 60 to 64mm. A 190mm saw cuts to 62.5 to 67mm. A 140mm to 150mm compact saw cuts to 45 to 46mm. Know the thickest material you cut regularly and confirm the saw reaches it with some margin. A saw that exactly meets your maximum depth requirement will bind under real conditions. One or two millimetres of headroom is minimum.
Motor type: brushless vs brushed. All five saws in this top 5 use brushless motors. Brushless motors are more efficient, run cooler under sustained use, and have longer service life than brushed alternatives. This matters for professional use where the saw runs for extended sessions. RYOBI’s ONE+ range includes both brushless and brushed options at different price points; the brushless models are the ones worth choosing for regular work.
Blade orientation: left vs right. Most saws have the blade on the right side of the motor body. For a right-handed user, the motor sits between the eye and the cut line. The Makita DHS680Z and the Milwaukee M12 FUEL are blade-left: the motor sits to the right, giving a right-handed user a direct sightline to the cut line at 0 degrees. This is a genuine ergonomic advantage for precision work. The M12 FUEL has a partial sightline limitation at 90 degrees despite the blade-left design, which requires technique to compensate.
Check battery compatibility before buying body-only. All five saws here are sold body-only without battery or charger. If you are entering a new platform, add two batteries and a charger to the total cost. On the Makita DHS782ZJ specifically, two 18V LXT batteries are required simultaneously: one battery is not enough to run the saw.
Final verdict and recommendations
The platform you commit to locks in your battery investment, which locks in your saw choice. The depth you need locks in the blade size. After those two decisions, the remaining choice is about weight, motor quality, and the features that match the way you work.
For most professionals starting on a new platform: DeWalt DCS570N 18V XR. The most versatile all-round professional saw at 64mm depth on a mature battery ecosystem.
For DeWalt XR professionals needing maximum depth and power: DeWalt DCS578N FlexVolt. The 67mm depth and 2,456W peak output justify the premium, and FlexVolt batteries extend the existing XR investment rather than replacing it.
For Makita LXT joiners and finish carpenters: Makita DHS680Z. The 3.0kg body weight and left-blade sightline are purpose-built for second-fix and trim work at 57mm depth.
For Makita LXT professionals cutting sheet goods on a guide rail regularly: Makita DHS782ZJ. Direct guide rail fit without adaptors, 36V power from two existing batteries, and a Makpac case included.
For access professionals working overhead or in confined spaces: Milwaukee M12 FUEL. At 2.5kg in working configuration, it is the only professional-grade circular saw light enough to use in those situations sustainably.
Three saws scored 4.2/5: the DeWalt DCS578N on test performance, the Makita DHS782ZJ on 36V guide rail capability, and the Milwaukee M12 FUEL on specialist access work. None of them is the right saw for everyone. The DeWalt DCS570N at 4.1/5 handles more use cases for more professionals than any other saw in this comparison. Start there unless you have a specific reason not to.
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