Hedge Trimmer vs Chainsaw: Which Tool for Which Branch?

Quick answer: In the hedge trimmer vs chainsaw choice, the deciding factor is stem thickness. A hedge trimmer is built to shear lots of thin, leafy stems at once, and its tooth spacing (about 1.2 to 1.3 inches on STIHL’s gas models) sets the thickest stem it can take. A chainsaw is for limbs and trunks beyond that. Shaping a hedge? Trimmer. Removing a branch? Saw.

They both have engines or batteries, and they both cut wood. That’s where the overlap ends.

When I compared STIHL’s hedge trimmer specs with OSHA’s chainsaw guidance, the dividing line turned out to be refreshingly simple. It’s the thickness of the stem in front of you.

A hedge trimmer works like a big pair of scissors, with two toothed blades sliding past each other. A chainsaw drags a chain of cutters through the wood.

One is made for hundreds of small cuts across a flat face of leaves. The other makes one deep cut at a time. Very different tools.

Hedge Trimmer vs Chainsaw at a Glance

	Hedge trimmer	Chainsaw
How it cuts	Two reciprocating toothed blades	A moving chain of cutters around a guide bar
Best for	Shaping hedges, shrubs and topiary	Limbs, trunks, firewood, storm cleanup
Stem size	Up to roughly the tooth spacing, about 1.2 to 1.3 in on STIHL’s HS 45 and HS 56	Limbs and logs thicker than a hedge trimmer can take
Cut style	Wide, shallow, many stems per pass	Narrow, deep, one cut at a time
Example specs	STIHL HS 45: 17.7 in cutting length, 10.5 lb	Bar lengths vary by saw and job
Main hazard	Blade contact, thrown debris	Kickback, chain contact
Protective gear	Eye and hearing protection, gloves	OSHA lists head, eye, hearing, foot and leg protection plus gloves

How a Hedge Trimmer Handles Branches

The tooth spacing is the number I’d look at first. It’s the gap between the teeth on the blade, and it sets how thick a stem can slide in to be cut.

STIHL lists 1.2 inch tooth spacing on its HS 45 gas hedge trimmer and 1.3 inch on the HS 56. Flymo’s hedge trimmer FAQ puts the rule simply: the wider the teeth spacing, the larger the material the trimmer can cut. It also tells owners to check the operator’s manual for the “recommended maximum twig dimension.”

That’s the rule. So a hedge trimmer is great for this year’s soft growth and twiggy older wood.

In practice, it’s the wrong tool for anything close to or thicker than its tooth gap. Forcing it past that limit is asking for ragged cuts and a struggling motor, so stay inside the manual’s maximum.

Flymo notes that mature hedges of woody plants like privet, holly or some conifers can have thicker stems. For those, you need more power and a wider gap, or a different tool.

How a Chainsaw Handles Branches

A chainsaw doesn’t care much about stem diameter within the length of its bar. A big limb is fine. It cuts limbs, trunks and logs that would stop any hedge trimmer cold.

The trade-off is risk. Real risk.

OSHA’s chainsaw fact sheet tells operators to be prepared for kickback, avoid cutting in the kickback zone and use saws with features that reduce kickback danger, such as chain brakes and low-kickback chains and bars. It also says to keep both hands on the handles and maintain secure footing.

A chainsaw is clumsy for shaping too. Trying to give a hedge a flat top with a chainsaw means sweeping the bar across lots of thin, springy stems, often near the nose of the bar, while OSHA tells operators to avoid cutting in the kickback zone. I wouldn’t do it.

Safety Differences That Matter

Honestly, the gear list tells you a lot about the risk. For chainsaw work, OSHA’s fact sheet lists:

• head protection, such as a hard hat
• hearing protection sufficient to bring noise exposure to 90 decibels or less
• eye and face protection, such as safety glasses
• protective footwear
• leg protection, such as work pants or chaps
• work gloves

OSHA also flags higher-risk chainsaw situations. Operating “above shoulder height” or off the ground, such as from a ladder, is on that list, and so is cutting directly overhead, which it says not to do. That rules a chainsaw out for the top of a tall hedge for most homeowners.

A hedge trimmer is far more forgiving, but it isn’t harmless. My advice: wear eye protection and gloves, keep both hands on the handles, and never reach across the blade to clear clippings while it’s running.

Which Should You Choose?

Here’s how I’d decide, by job:

• Choose a hedge trimmer if you’re shaping hedges or shrubs, cutting soft new growth or keeping a formal hedge flat and square. Check that the tooth spacing suits your stems.
• Choose a chainsaw if you’re removing limbs, cutting down small trees, clearing storm damage or cutting firewood.
• Choose neither for the in-between stems. A branch a little thicker than your trimmer’s tooth gap is often a job for hand loppers or a pruning saw, which are slower but give clean, controlled cuts.
• Choose a pole saw if the branch is out of reach overhead. See pole saw vs chainsaw before you reach for a ladder.

Many yards need both. Just not on the same branch.

My take: if you own one first, make it the tool for the job you do most often. For most suburban yards, that’s the hedge trimmer.

What About Overgrown Hedges?

This is where most people get tempted to use a chainsaw on a hedge. Don’t. An overgrown hedge often needs both tools in sequence.

Cut out the thick, woody stems first with loppers, a pruning saw or a chainsaw, working low and with both feet planted. Then shape what’s left with the hedge trimmer.

The trick is simple. Keep each tool on the stems it’s built for. Don’t push the trimmer into wood that’s too thick, and don’t swing a chainsaw across leafy growth.

If you do end up running a pole saw or chainsaw, keep the chain sharp. For STIHL pole saws, see what size file for STIHL pole saw chain. More tool guides are in our saws and trimmers section.

Frequently Asked Questions

Can a hedge trimmer cut branches?

Small ones. A hedge trimmer cuts stems up to about its tooth spacing, which is 1.2 inches on STIHL’s HS 45 and 1.3 inches on its HS 56. Check your manual for your model’s maximum.

Can you trim hedges with a chainsaw?

You can cut thick hedge stems with one, but it’s a poor tool for shaping. Sweeping the bar across thin stems makes it hard to stay out of the kickback zone, and OSHA also advises against cutting directly overhead.

What size branch can a hedge trimmer cut?

It depends on the tooth spacing. Flymo says wider spacing cuts larger material and tells owners to follow the manual’s maximum twig dimension.

Is a hedge trimmer safer than a chainsaw?

Generally yes, because it has no kickback from a spinning chain. It still needs eye protection, gloves and both hands on the tool.

Do I need a chainsaw for an overgrown hedge?

Not always. Loppers or a pruning saw handle many thick stems. A chainsaw helps when stems are too thick for those, used low and with full protective gear.

Last updated: November 10, 2026. Sources: STIHL HS 45 hedge trimmer specs, Flymo hedge trimmer FAQs and OSHA fact sheet: working safely with chainsaws (PDF).