Buy a scissor-style PEX cutter for occasional half-inch work and a ratcheting one for 3/4-inch, 1-inch or a whole repipe. Either shears the tube square in one motion, which is what lets the tubing seat fully on the fitting barb. A utility knife or hacksaw leaves an angled end that weeps later.
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A PEX cutter is a ten-second decision that shows up on every joint you make. Cut PEX with a hacksaw or utility knife and you get an angled, pinched end that won’t seat square in the fitting — and a connection that may pass a pressure test today and weep in a year. Here’s the right tool and why the cut matters more than people expect.
Going the PEX-A route? The method needs its own tool — see PEX expansion tools.
Why the cut decides the joint
Every PEX connection method — crimp rings, cinch clamps, expansion — depends on the tubing sitting fully and squarely on the fitting barb. An angled cut leaves part of the tube short of the shoulder. A pinched or oval cut means the ring compresses unevenly around it. Neither necessarily fails immediately, which is the problem: it fails later, inside a wall.
What a proper PEX cutter gives you is a square, clean, round cut in one motion. The blade shears rather than saws, so there’s no plastic swarf inside the tube and no deformation at the end.
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Best Scissor PEX Cutter
IWISS iCrimp PEX Cutter
The straightforward scissor-style cutter. Note the maker’s own warning: it’s built for PEX tubing, not for rigid PVC. Use it for what it’s for and it lasts. — IWISS iCrimp PEX cutter (1/8″–1″) on Amazon.
Best Ratcheting PEX Cutter
Mutt Tools Ratcheting PEX Cutter
Same size range, but the ratcheting mechanism multiplies your grip, which is what you want on 3/4″ and 1″ tubing or when you’re making a lot of cuts in a day. It also handles PVC and CPVC. — Mutt Tools ratcheting PEX cutter (1/8″–1″) on Amazon.
Scissor or ratchet? For occasional half-inch work, the scissor cutter is faster and simpler. For a repipe, or anything above 3/4″, the ratchet saves your hand.
Best Cordless
Milwaukee M12 Cordless PVC Shear
If you cut PEX by the hundred — a repipe, a manifold job, a commercial rough-in — the tier above a hand cutter is a powered shear. Amazon lists this one as the Milwaukee M12 12-Volt Cordless PVC Shear (2470-20), and the listing’s own specs give it burr-free cuts on PVC, CPVC, PEX tubing, BlazeMaster, ABS, non-metallic conduit and rubber hose, with a patented shear mechanism rated to 2-inch Schedule 80 PVC.
Two details matter for PEX in particular. The blade is offset, so it cuts tube that is already in a wall or sitting close to one — exactly where a scissor cutter cannot open. And the trigger is variable speed, which the listing ties to a controlled cut in warm or cold weather, the cold-tubing problem above. It is a bare tool: the 2470-20 ships without a battery or charger, and the listing claims over 200 cuts per charge once you have one. — Milwaukee cordless PVC shear 2470-20 (not linked: third-party seller only on 10/3/2026).
Keeping it cutting clean
- Cut once, all the way. Stopping and re-squeezing puts a step in the end. Commit to the stroke.
- Keep the tube square in the jaw — the jaw geometry does the aligning if you let it seat rather than holding the tube at an angle.
- A dull blade crushes instead of shearing. If the ends are coming out oval or the plastic is graying at the cut, the blade is done. Most decent cutters take replacement blades, so a dull blade does not mean a new tool.
- Cold PEX is stiffer. On a winter job, tubing off the truck cuts harder and deforms more easily — another argument for the ratchet.
After the cut
Slide the ring on before the fitting, seat the tubing fully to the fitting shoulder, and check the depth mark if your fittings have one. The connection tool then does its job — see the PEX crimp tool guide, and if you’re still deciding on method, crimp vs clamp lays out the tradeoffs.
A go/no-go gauge is the last honest check on a crimp joint: if the ring passes, the joint is right; if it doesn’t, cut it out and redo it now rather than after drywall.
What Is the Best PEX Cutter?
For occasional half-inch work, the best PEX cutter is a simple scissor-style tool. For 3/4-inch and 1-inch tubing, or for a repipe, a ratcheting PEX cutting tool saves your hand. Either is a PEX tubing cutter that shears in one motion; neither should be swapped for a knife or a hacksaw.
How to Cut PEX Pipe
Seat the tubing square in the jaw, then close the cutter in one continuous squeeze. Do not stop and re-squeeze — that puts a step in the end. Check the cut: it should be round and square, with no swarf inside the tube. If the end comes out oval, the blade is dull.
FAQ
Can I cut PEX with a utility knife or hacksaw?
You can, but you shouldn’t. A knife cut tends to run at an angle and a hacksaw leaves plastic debris and a rough end. Both make it harder for the tubing to seat square on the fitting, which is where leaks start.
Do I need a different cutter for PEX-A and PEX-B?
No — the same cutter handles both. The difference between PEX-A and PEX-B is in the tubing’s manufacture and connection method, not in how you cut it. See PEX-A vs PEX-B.
Why is my PEX cutter crushing the tube?
Almost always a dull blade, or stopping partway through the cut. Replace the blade if the ends come out oval, and make each cut in one continuous motion.
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Related guides
A cutter is also the fallback when a crimp goes wrong — see how to remove a PEX crimp ring or cinch clamp for when to cut the fitting out instead of trying to save it.
Related: on copper the equivalent failure is a wheel that walks — see why a tubing cutter cuts crooked.