Intro
Ripping a sheet of plywood down to size, cross-cutting floorboards to length, or trimming a door to fit a wonky frame — these are the moments that define a construction or renovation project. A circular saw is the tool that turns a stack of timber into a fitted floor, a stud wall, or a set of custom shelves. Unlike a jigsaw that wanders on long cuts or a handsaw that tests your patience and your shoulder, a circular saw delivers straight, repeatable cuts at speed — and when it is cordless, you are not tethered to a socket or tripping over an extension lead with every pass. Modern lithium-ion battery technology has reached the point where a cordless circular saw can match the cutting performance of corded models for all but the most demanding production environments, while giving you the freedom to cut wherever the timber happens to be — in the garden, on the driveway, up on scaffolding, or at the far end of a building site. For carpenters, kitchen fitters, joiners, and serious DIY renovators, a capable cordless circular saw is not a luxury — it is the difference between wrestling with materials and working with them.
Generalities
The cordless circular saw market has matured rapidly, with professional-grade machines now delivering the power, runtime, and precision that were once exclusive to corded tools. When evaluating a circular saw, the headline numbers are blade diameter — 165 mm is the standard for a full-size saw — and cutting depth, which at 57 mm at 90° lets you slice through a standard 50 mm worktop or two layers of 25 mm board in a single pass. Bosch Professional, the blue-tier range aimed at tradespeople rather than DIYers, brings its 18V battery platform to the GKS 18V-57 G — a saw that has earned a near-perfect 4.8 out of 5 stars from over 4,700 reviews and a #11 bestseller rank in Circular Saws on Amazon France. It ships body-only in a stackable L-BOXX case, making it a natural choice for tradespeople already invested in the Bosch Professional 18V system.
In this review we examine the cutting power and depth — 57 mm at 90°, the 165 mm blade and 24-tooth tungsten-carbide tooth configuration — the guide-rail compatibility, the right-side blade placement option, the electronic brake, and the real-world experience of using this saw for rip cuts, cross cuts, and sheet material breakdown. We also cover the body-only format, what you need to run the saw, and how it fits into the broader Bosch Professional 18V ecosystem.
Description
The Bosch Professional GKS 18V-57 G spins a 165 mm blade — the standard size for a full-capacity circular saw — at 3,400 RPM through a brushless-equivalent motor optimised for the brand's 18-volt battery platform. The 24-tooth tungsten-carbide-tipped blade included in the box is a general-purpose wood blade with a 20 mm arbor and a kerf of 1.7 mm, cutting a thin slot that wastes minimal material and reduces the load on the motor. The headline cutting capacity is 57 mm at 90 degrees — enough to cut through a standard kitchen worktop, a solid 50 mm timber joist, or two sheets of 22 mm chipboard flooring in a single pass. At a 45-degree bevel the depth reduces, as with all circular saws, but the bevel mechanism itself is sturdy and locks positively at common angles including 45° for mitre cuts on skirting and architrave.
Bosch has designed the GKS 18V-57 G with practical jobsite features that separate it from entry-level saws. The blade can be mounted on either the left or right side of the motor housing — a feature that left-handed users will appreciate immediately and that right-handed users will value when the cut line visibility on one side is blocked by the workpiece orientation. The saw is guide-rail compatible, meaning it slots onto Bosch's FSN guide rail system (as well as compatible rails from other manufacturers) for dead-straight, splinter-free cuts across full sheets of plywood or MDF without needing to clamp a straight edge. The electronic brake stops the blade within seconds of releasing the trigger — a safety feature that also speeds up your workflow because you are not waiting for the blade to coast down before setting the saw aside.
In everyday use the saw balances power and control effectively. The 3,400 RPM no-load speed is well-matched to the 165 mm blade — fast enough to make clean, burn-free cuts in softwood and sheet materials without racing so fast that the blade overheats in hardwood. The parallel guide included in the box gives you repeatable rip cuts without needing to measure and mark every pass, and the dust extraction adapter lets you connect a vacuum to keep the work area — and your lungs — clearer. The saw body is compact for its class at 17.3 × 14.2 × 9.5 cm, and the ergonomics reflect Bosch's experience designing tools for all-day professional use: the main handle is generously sized for gloved hands, the auxiliary handle gives you two-handed control for precise plunge-style cuts, and the trigger placement is natural whether you are working right-handed or left-handed with the saw in either blade orientation.
The saw ships body-only in a Bosch L-BOXX 238 — the brand's stackable, clip-together storage system that integrates with the wider L-BOXX and Sortimo van-racking ecosystem. Inside the box you get the saw, a 24-tooth wood blade, a parallel guide, a dust extraction adapter, and the hex key for blade changes — everything except the battery and charger. For existing Bosch Professional 18V users this is efficient; newcomers need to budget for at least one 4.0 Ah battery (the minimum recommended capacity) and a charger. Bosch recommends ProCORE 18V batteries for maximum runtime and cutting performance, and the saw is compatible with the full range of Bosch Professional 18V packs from 2.0 Ah compacts to 12.0 Ah high-capacity ProCORE units.
The GKS 18V-57 G holds an outstanding 4.8 out of 5 stars from nearly 4,800 customer reviews on Amazon France and ranks #11 in Circular Saws — figures that place it among the most highly-rated and best-selling saws in its category. It is TUV certified, manufactured in China under Bosch Professional's quality control, and comes with a three-year manufacturer warranty plus two years of guaranteed EU spare parts availability. At €220.90 for the body only in an L-BOXX, it is priced at the professional tier — roughly double what an entry-level corded circular saw costs — but competitive against other cordless saws in the premium 18V segment from Makita, DeWalt, and Milwaukee. For tradespeople who already run Bosch Professional batteries and value the guide-rail compatibility, the ambidextrous blade placement, and the proven cutting performance that 4,800 reviewers have confirmed, this saw is a benchmark tool in its class.
Pros and cons
Pros
- 4.8 out of 5 stars from nearly 4,800 reviews and ranked #11 in Circular Saws — exceptional social proof that confirms real-world performance, reliability, and user satisfaction at scale
- 57 mm cutting depth at 90° with a 165 mm blade cuts through standard worktops, solid 50 mm joists, and double-layer sheet material in a single pass — genuine full-size saw capacity in a cordless format
- Guide-rail compatible with Bosch FSN system — slide the saw onto a rail and get dead-straight, splinter-free cuts across full sheets without clamping a separate straight edge
- Blade can be mounted on the left or right side of the motor housing — a genuine ambidextrous feature that improves cut-line visibility for both left- and right-handed users depending on workpiece orientation
- Electronic blade brake stops the blade within seconds of releasing the trigger — improves safety and speeds up workflow because you are not waiting for the blade to coast down between cuts
- Includes sturdy L-BOXX 238 carry case that stacks and clips with the wider L-BOXX and Sortimo van-racking system — professional storage that protects the saw during transport and keeps accessories organised
- Three-year manufacturer warranty with two years of EU spare parts guarantee — Bosch Professional's after-sales support is among the best in the industry, with a wide service centre network across Europe
- Part of the Bosch Professional 18V System — the same batteries power over 100 tools across drilling, cutting, grinding, and site lighting, so your battery investment scales across your entire toolkit
Cons
- Body-only format — no battery or charger included — first-time Bosch Professional buyers must budget an additional €80–150 for a 4.0 Ah battery and charger before the saw is usable
- At 5.7 kg including a recommended 4.0 Ah battery, this is a substantial tool — extended overhead or vertical cutting will fatigue your arms faster than lighter compact saws in the 3–4 kg range
- 57 mm depth at 90° drops at bevel angles — at 45° the cutting depth is approximately 40 mm, which may not be sufficient for bevel cuts on thicker timber sections like rafters and structural beams
- Premium pricing at €220.90 body-only — roughly double an entry-level corded circular saw, making it harder to justify for DIY users who cut timber only a few times per year and do not need cordless freedom
- The included 24-tooth blade is a general-purpose wood blade — for clean cross-cuts in plywood, melamine, or laminates, you will want to invest in a higher-tooth-count fine-finish blade to avoid chipping
Use cases
The Bosch Professional GKS 18V-57 G cordless circular saw is built for carpenters, kitchen fitters, joiners, and serious renovators who need a full-capacity 165 mm saw with guide-rail precision and cordless freedom, and who are already invested in — or ready to invest in — the Bosch Professional 18V battery platform.
Professional Carpentry and First-Fix Work
Cutting floor joists, roof timbers, stud walls, and structural timber on site demands a saw that works reliably wherever the timber stack happens to be. The 57 mm depth handles standard joist dimensions, the guide-rail compatibility gives you perfectly straight rip cuts across long lengths, and the cordless format means no generator or extension leads on sites with limited power access. The L-BOXX system integrates with site storage and van racking for quick deployment.
Kitchen Fitting and Bespoke Joinery
Cutting worktops to length, trimming end panels to width, and scribing filler pieces to uneven walls are everyday kitchen-fitting tasks. The guide-rail compatibility is transformative here — you can break down full sheets of 18 mm or 22 mm MFC (melamine-faced chipboard) with clean, chip-free cuts by pairing the saw with a fine-tooth blade and a rail. The right-side blade option keeps the cut line visible when working in tight galley kitchens.
Sheet Material Breakdown on Site
Breaking down 2,440 × 1,220 mm sheets of plywood, OSB, or MDF on a building site is where this saw combined with a guide rail truly excels. The rail guarantees a straight cut without clamping a batten, the 57 mm depth handles 18 mm and 22 mm sheets in a single pass, and the dust extraction adapter keeps airborne particles under control when cutting indoors or in occupied properties.
Timber Decking and Landscaping Projects
Building a deck, a pergola, or raised planting beds means cutting dozens of timber sections to length, often in the garden far from a power socket. The cordless format lets you work at the build location without extension leads snaking across wet grass, and the 165 mm blade handles 47 × 150 mm decking boards and 50 mm framing timber without needing to flip the workpiece for a second pass.
Renovation and DIY Structural Timber Work
Trimming doors to fit new flooring, cutting floorboards for access to pipework, notching joists for cable runs, and sizing plywood for loft boarding — these renovation tasks mix precision with portability. The electronic brake makes repetitive cuts faster and safer, the parallel guide gives consistent rip widths without measuring every time, and the saw's 4.8-star rating from thousands of users provides confidence that it will perform when you need it to.