The Best Circular Saw UK (2026): Four Picks and the Cuts That Need a Pro

Most people buy a circular saw for a single job — boarding a loft, ripping decking to width, trimming a worktop — then keep it for the next twenty years. The gap between a £75 saw and a £220 one shows up in places the packaging never mentions: whether the shoe is still square after it has been knocked off a trestle, how cleanly the lower guard retracts on a 45-degree bevel, and how much timber you clear in one pass.

There is a second thing this guide does that most do not. A circular saw will cut straight through things it has no business touching — a trussed rafter, a notched floor joist, an asbestos cement garage roof — and it gives you no warning at all. So alongside the picks, we set out plainly which cuts a competent DIYer can make and which belong to a joiner, a structural engineer or a licensed contractor.

This is written for UK homeowners and semi-pro DIYers cutting construction timber, sheet material and decking — not for site chippies who already know which battery platform they are locked into.

• •You cut sheet goods a few times a year: plywood, MDF, OSB, loft boards.
• •You have a shed, deck or garden project using 4x2 CLS or C16 timber.
• •You want one saw, not a workshop full of them.
• •You are not fitting kitchens weekly — that is a plunge-and-track saw job.
• •You would rather spend £30 on the right blade than £100 more on the tool.

Honesty first: this is expert-research-led, not a controlled laboratory test. The picks come from years of using these tools on UK jobs and in domestic workshops, cross-checked against current manufacturer specifications, UK retail availability and the failure patterns we see repeatedly. We have not put four saws on a dynamometer for this update, and we are not going to pretend otherwise.

• •Real depth of cut at 90 and 45 degrees against actual UK timber sizes, not the marketing figure.
• •Shoe rigidity: pressed steel flexes, magnesium or cast does not.
• •Guard behaviour on bevels and part-cut plunge starts, where cheap guards snag.
• •Sightline and dust port — can you see the line without leaning over the blade?
• •UK spares and blade availability five years from now, not just today.

Blade diameter matters more than brand. A 165mm cordless saw gives 55–61mm of cut at 90 degrees and 40–45mm at 45. Standard 4x2 CLS is 63mm thick, so a 165mm saw cannot clear it in one pass — you cut, flip and finish, which is slower and never quite in line. A 184–190mm saw gets you 63–70mm and clears CLS, decking and most C16 joist stock in one go.

On power, an 18V brushless saw with a 5.0Ah pack will manage 50–70 crosscuts in 18mm ply before a battery swap, which covers almost every domestic job. Corded still wins on sustained ripping and price per watt — the full trade-off is in our guide to cordless versus corded tools.

• •165mm cordless: light, one-handable, ideal for sheet goods. Struggles past 57mm stock.
• •184–190mm cordless: 3.5–4kg, but clears CLS and joists in a single pass.
• •190mm corded: cheapest route to full depth; use a 30mA RCD outdoors.
• •Track-guided plunge saws: the right answer for worktops and veneered panels, at a different budget.

Two saws with identical depth figures can feel a generation apart in the hand. These are the details that separate them.

• •A brake that stops the blade in under two seconds — the best safety feature on a modern saw.
• •A machined or cast shoe. Check it against a known square on arrival and return it if it is out.
• •Positive bevel detents at 22.5 and 45 degrees, not a friction scale you eyeball.
• •A dust port that mates with a 32mm or 35mm extractor hose without gaffer tape.
• •A rip fence in the box, plus a guide rail option if you cut full sheets.
• •A decent blade: 24 teeth rips softwood fast, while 40–60 teeth with negative rake is what laminate, plywood and MDF need to avoid tear-out.

This is the part the manual leaves out. A circular saw is simple to use, but several common household jobs cross into structural, health or regulatory territory where the right answer is to stop. Run through our power tool safety checklist before the first cut, and our guide to using a circular saw for the technique.

• •Fine for a competent DIYer: cutting sheet material to size, ripping decking and battens, trimming skirting and architrave, shed framing, loft boards and non-structural noggins.
• •Fine with care: notching a floor joist for a cable or pipe, but only within the permitted zone — top edge only, between 0.07 and 0.25 of the span, no deeper than one-eighth of the joist depth. Outside that, you have weakened the floor.
• •Call a structural engineer: any cut into a trussed rafter, purlin, binder, steel or lintel. Trusses are engineered assemblies and cutting one web member can compromise the whole roof; no notch in a truss is ever acceptable.
• •Call a professional: altering load-bearing timber, forming an opening for a stair or loft hatch, or anything Building Control would need to sign off.
• •Stop entirely: asbestos cement roof sheets, old garage panels, soffits or asbestos insulating board in pre-2000 properties. Power-cutting these breaches the Control of Asbestos Regulations 2012 — get a survey, and licensed removal for AIB.
• •Wear the kit for the jobs you can do: FFP3 mask, ear defenders, eye protection. Hardwood dust is a Category 1 carcinogen with an HSE exposure limit of 3 mg/m³, and fibre-cement board releases respirable silica that needs on-tool extraction.

• •Buying a 165mm saw for joist and CLS work, then finding it will not clear 63mm in one pass.
• •Taking the kit with two 2.0Ah batteries because it looked like value. A saw drains small packs in minutes — buy bare and add 4.0Ah or 5.0Ah.
• •Keeping the blade that came in the box. A £22 quality TCT blade improves a budget saw more than £100 of extra tool ever will.
• •Cutting freehand across a 2440mm sheet. Clamp a straight edge — otherwise the offcut wanders and the blade binds.
• •Buying a circular saw when the job is repeat accurate ripping; our table saw guide for beginners covers that properly.

For most UK households the Makita DHS660 is the saw to buy: light, accurate out of the box, and part of a battery platform you can grow into. If your work is decking, joists and shed framing, take the corded Bosch GKS 190 and spend the difference on blades and a guide rail. If you are still learning the tool, read the woodworking mistakes beginners make first.