ReviewsTop picksGift guidesCategoriesExplainedThe JournalHow we reviewAbout Affiliate disclosure

Explained

Circular Saws, Explained

After reading, you'll know which capacity figure governs your cuts and why two saws with identical headline specs are not equivalent.

Updated October 9, 2026 · Companion to our Tools & DIY review

DEWALT DWE575SB 7-1/4 in. Lightweight Circular Saw with Electric Brake - our top pick
In this guide

Circular saw listings quote a cutting capacity measured with the shoe flat. Tilt it for a bevel and roughly a quarter to nearly a third of that capacity disappears, by an amount that varies between saws.

The 30-second version

  • The headline depth is measured at 90 degrees, and the usable depth at 45 runs roughly 25 to 30 percent lower where it is published, by a proportion that differs between models with similar headline figures.
  • Amperage has converged, because 15 amp is what a standard household circuit supports, so nearly every full-size corded saw quotes it and the number no longer discriminates.
  • An electric brake is the real safety spec, stopping the blade in a fraction of the several seconds it otherwise coasts after the trigger releases.
  • Magnesium buys toughness, not capacity, which is why the magnesium saw in a group can cost more without cutting any deeper, so check the listed weight.
  • Cordless listings can hide the bevel figure, as the two DEWALTs here share a 90 degree capacity, but DEWALT does not publish a 45 degree figure for the cordless one.

The products this guide is about

Our verdict on each, with the full reasoning on the companion review.

What actually matters

  • Depth of cut at 90 degrees - the headline capacity, measured with the shoe flat. A 7-1/4 in. saw typically clears 2.5 in., which covers 2x material in one pass.
  • Depth of cut at 45 degrees - the figure that governs bevelled cuts. Lower than the 90 degree figure, by roughly a quarter to nearly a third on the saws that publish it, and often not published at all.
  • Electric brake - stops the blade after the trigger releases instead of letting it coast. The clearest safety differentiator in the category.
  • Bevel range - how far the shoe tilts, commonly to 45, 55 or 57 degrees, usually with detents at 22.5 and 45. Range is worth little if depth at 45 is already short.
  • Shoe material - stamped steel, aluminium or magnesium. Magnesium is stiff and tough and costs more. Compare listed weights, since a magnesium saw is not automatically the lighter one.
  • Blade side - left-blade and right-blade saws put the motor and your sightline on opposite sides. It changes which side of the cut you can see and is largely a preference.

The specs, in plain English

SidewinderA saw with the motor mounted alongside the blade. Lighter, shorter and the common design in most of the world.
Worm driveA saw with the motor behind the blade driving through a worm gear. Longer, heavier, higher torque, and favoured for framing and rip cuts.
Depth of cut at 45Maximum material thickness the saw will cut with the shoe tilted to 45 degrees. The specification that decides bevel work.
Electric brakeA circuit that reverses the motor briefly on trigger release to stop the blade quickly rather than letting it spin down.
Bevel detentA positive stop at a common angle, usually 22.5 and 45 degrees, that lets the shoe be set accurately without measuring.
ShoeThe flat plate that rides on the workpiece. Its material and flatness decide how accurately the saw tracks a line.
ArborThe shaft the blade mounts on, 5/8 in. on standard 7-1/4 in. saws. Blades are sold to match and an adapter is a compromise.
No-load speedRPM with nothing being cut, quoted around 4,800 to 5,800. It tells you little, since what matters is speed held under load.
Riving knifeA thin plate behind the blade that keeps the kerf open to resist kickback. More common on track and table saws than on circular saws.

Green flags vs red flags

Green flags

  • Both the 90 and 45 degree cut depths are published.
  • An electric brake is stated explicitly rather than implied.
  • Shoe material is named, and magnesium or aluminium is specified rather than just metal.
  • Bevel detent positions are listed, not just the maximum angle.
  • Speed under load is discussed rather than only the no-load RPM.

Red flags

  • Only one cut depth figure appears and it is the 90 degree one.
  • Capacity is quoted as fitting 2x material rather than as a measurement.
  • Amperage and RPM lead the listing while depth figures are hard to find.
  • No mention of a brake anywhere in the specification.
  • Bevel range is promoted to 55 or 57 degrees with no depth figure at 45.

Who's who: the brands

  • DEWALT - Corded and cordless lines, with an electric brake on some models, such as the DWE575SB.
  • Makita - Magnesium construction is the signature, and the 5007MG lists its depth at 90, 45 and 56 degrees.
  • CRAFTSMAN - Budget full-size saws, occasionally with features like a magnesium shoe, and no published depth at 45 degrees on the CMES510.
  • SKILSAW - The worm drive specialists, and the reason worm drive saws are called Skilsaws on much of the US west coast.
  • Bosch - Makes corded sidewinder circular saws.

How to read a listing without getting fooled

Find the 45 degree depth figure first, and if there is none, treat the listing as incomplete for bevel work. Divide it by the 90 degree figure to see how much the saw loses when tilted, and compare that proportion between models rather than the headline numbers. Then check for an explicit electric brake. Read amperage and RPM last, since they have converged across the category.

How much should you spend?

Budget buys a full-size corded saw that will cross-cut 2x material and may not tell you its bevel capacity. Mid-range can buy published depth figures at both angles plus an electric brake, which is where most people should land. Premium buys magnesium construction, or it buys cordless, and a cordless listing may not tell you its depth at 45 degrees.

Questions, answered

Can any 7-1/4 inch saw cut a 2x4 at 45 degrees?

The two saws here that publish a 45 degree figure can, since dressed 2x material is about 1.5 in. thick and the shallower of the two figures is 1.75 in. The cordless DEWALT and the Craftsman publish no 45 degree figure, so for them it cannot be confirmed from the maker. The margin is what varies. Once you move to thicker stock, doubled material or 5/4 decking on edge, the difference between 1.75 and 1.9 inches decides whether the cut happens in one pass.

Is cordless as powerful as corded now?

For most cutting, yes: brushless motors hold speed under load well enough that power is no longer the deciding factor. What has not equalised is what is published and endurance. The cordless saw here matches its corded sibling at 90 degrees, but DEWALT does not publish a 45 degree figure for it, and sustained ripping still drains batteries in a way a cord does not.

Why do some saws have the blade on the left?

It changes which side of the cut you can see. A right-handed user on a right-blade saw sights across the motor; on a left-blade saw the cut line is directly visible but the offcut falls on the other side. Neither is better, and switching between them is the awkward part, so most people pick one and stay with it.

Does a more expensive blade matter more than the saw?

Often, yes. Tooth count, kerf width and carbide quality decide finish and cutting effort more than a few hundred RPM does, and a good blade on a mid-range saw will out-cut a stock blade on an expensive one. The saw decides depth, bevel and braking; the blade decides how the cut looks.

Ready to choose? See our top pick, the alternatives, and the one we'd skip See the Circular Saws verdicts

Or jump to the head-to-head: DEWALT DWE575SB 7-1/4 in. Lightweight Circular Saw with Electric Brake vs Makita 5007MG 7-1/4 in. Magnesium Circular Saw.

Related guides

Clamp Meters After reading, you'll understand why some clamp meters cannot read DC at all, why one can show zero on a live cord, and how to tell a real safety rating from a printed claim. Cordless Drills After reading this, you'll be able to look at any cordless drill listing and know exactly which specs matter, which are marketing noise, and which battery family you're really signing up for. Cordless Ratchets After reading, you'll understand what a cordless ratchet is genuinely for, and which two numbers decide whether one will work in your hands. Crimping Tools After reading, you'll understand why the die has to match the terminal, what a ratchet does and does not guarantee, and which standards give you a number you can actually check a crimp against. Cut-Resistant Gloves After reading, you'll understand exactly what a cut level means under each standard, how to convert between them, and which of the other ratings on the label are worth anything. Digital Calipers After reading, you'll understand why a finer display does not mean a better caliper, what accuracy figures are worth trusting, and why how you hold the tool matters more than the last digit.