Best 45cc Chainsaws for Efficient Cutting

If you’re shopping for a mid-size gas chainsaw, the 45cc class is one of the best places to land. You get enough power to fell small-to-medium trees, split firewood rounds, and handle storm cleanup — without hauling around a lumberjack-sized saw all day. I’ve run saws in this class on my Montana property for years, and the difference between a well-matched 45cc and a wrong-sized saw is real. Too small and you’re fighting the work. Too large and you’re fighting the saw.

This article covers the full 42–50cc mid-size gas class, because that’s how shoppers actually compare saws. You’ll see it labeled 45cc, 46cc, or even 50cc depending on the brand — they all compete in the same category. I’ll tell you exactly what I’d buy at each price point, and what to watch out for before you pull the trigger. If you’re still figuring out what size saw fits your needs overall, my guide to the best chainsaws for homeowners is a good place to start.

Saw	Engine Size	Bar Length	Weight	Best For
Husqvarna 450 Rancher	50.2cc	20″	13.2 lbs	Best Overall / Pro-Quality
Husqvarna 445	45.7cc	18″	12.1 lbs	Mid-Range / Best Value Pro Brand
Remington RM4618	46cc	18″	12.3 lbs	True 46cc / Homeowner Class
CRAFTSMAN S185	42cc	18″	11.8 lbs	Budget Pick / First Chainsaw
Poulan Pro PR4218	42cc	18″	12.0 lbs	Entry-Level / Occasional Use

What to Look for in a 45cc Chainsaw

Before you buy, there are four things worth understanding about this engine class. Getting these right saves you from returns, frustration, and saws that don’t match your actual workload.

Bar Length

A 45cc engine pairs best with a 16″ to 20″ bar. Most homeowners are well-served by 18″, which gives you enough reach for firewood rounds and small tree felling without overloading the engine. Go to a 20″ bar and you’re asking more from the powerhead — the saw can handle it, but the cut will feel slower and the chain will dull faster under heavy load.

My general rule: match bar length to your most common job, not your biggest one. You can always take two passes on a wide log. If you want to dig into the details, my chainsaw bar length guide walks through the full math for different tree diameters and use cases.

Weight and Balance

Most 45cc-class saws come in between 11 and 13.5 lbs without fuel. That sounds light until you’ve been limbing branches for two hours with your arms extended. Weight matters, but balance matters more. A front-heavy saw will wear out your left arm fast. Pick one up before you buy if you can — or read reviews specifically mentioning balance, not just weight specs.

Sub-13 lbs is a reasonable target for homeowners. Professionals running a saw all day often prefer lighter options in the 40–43cc class. If you’re going heavier, make sure the anti-vibration system earns its keep.

Safety Features

Three features I consider non-negotiable on any chainsaw, regardless of price:

• Chain brake: Stops the chain instantly on kickback. Every modern saw should have it. Verify it works before first use.
• Throttle interlock: Prevents the throttle from engaging accidentally. Critical if you’re new to chainsaws.
• Anti-vibration system: Reduces fatigue and keeps your grip firm. Budget saws often skip this — it shows after 30 minutes of use.

Don’t skip the personal protective equipment either. Chainsaw chaps, a helmet with face shield, gloves, and steel-toed boots are the baseline. No saw on this list is worth running without them.

Gas vs. Battery at This Engine Class

The honest answer: at 45cc, you’re almost exclusively in gas territory. Battery technology has made serious progress in the 40V–80V range, but for sustained cutting power, cold-weather starting reliability, and cost-per-cut at this engine class, gas still wins. The best battery saws comparable to a 45cc gas engine run $400–$600 for the platform alone. If you’re already in a battery ecosystem or you’re cutting close to an outlet, a battery-powered option might make sense — but for firewood production and tree work, the 45cc gas class is still the standard.

Best 45cc Chainsaws: My Top Picks

Husqvarna 450 Rancher — Best Overall

The 450 Rancher is technically 50.2cc, but it’s the saw I’d point almost anyone to when they ask about the 45cc class. It runs a 20″ bar, starts easily with Husqvarna’s Smart Start system, and has the X-Torq engine that cuts fuel consumption by up to 20% compared to older designs. I’ve run this saw for firewood production and it handles hardwood — oak, maple, birch — without complaint.

The air injection centrifugal cleaning system keeps debris out of the air filter longer, which matters if you’re cutting in dusty conditions. Build quality is noticeably better than the homeowner-grade options. If you want a saw that will last a decade with proper maintenance, this is the one.

Husqvarna 445 — Best Mid-Range Pick

The 445 sits right at 45.7cc and comes with an 18″ bar — a near-perfect pairing for homeowner use. It shares Husqvarna’s X-Torq and Smart Start systems with its bigger sibling but comes in lighter and at a lower price. If you don’t need the extra reach of a 20″ bar and you’re not running the saw daily, the 445 is the sweet spot.

This is the saw I’d hand to a first-time buyer who wants a brand name they can trust and doesn’t want to overspend. The 18″ bar handles most firewood work, limbing, and small tree felling without issue. Parts availability and dealer support for Husqvarna also make ownership less stressful long-term.

Remington RM4618 — True 46cc Homeowner Pick

The RM4618 is a true 46cc saw at an accessible price. Remington has been making homeowner-grade outdoor power equipment for decades, and this saw reflects that positioning — it’s not built for daily professional use, but for the homeowner who needs a capable gas saw a few times a year, it does the job.

The 18″ bar handles most residential cutting tasks. The quickstop chain brake and low-kickback chain are good safety additions for less experienced users. Starting isn’t quite as refined as Husqvarna’s Smart Start, but it’s manageable with proper choke technique. For the price, the power-to-dollar ratio is solid.

CRAFTSMAN S185 — Best Budget Pick

CRAFTSMAN has earned its place in the garage of homeowners across the country, and the S185 is a reasonable first chainsaw for someone who doesn’t want to spend Husqvarna money. At 42cc, it’s at the lower end of this class, but the 18″ bar is a smart pairing and the saw handles routine yard work without issue.

I wouldn’t use this for production firewood cutting or frequent tree work. But for cleaning up a downed limb, cutting a cord of wood once a season, or clearing brush — it gets the job done. The CRAFTSMAN brand also means parts are easy to find at any hardware store. For a budget first saw, it’s a reasonable starting point.

Poulan Pro PR4218 — Best Entry-Level Value

Poulan Pro is owned by Husqvarna, which means the engineering DNA is there even at the entry price. The PR4218 runs a 42cc engine with an 18″ bar, and it’s one of the most widely available saws in this class at big-box retailers. It’s a step up from no-name imports and a step below the Husqvarna branded lineup.

For someone doing light seasonal work — clearing a property line, cutting up a fallen tree after a storm, processing a small amount of firewood — the PR4218 is a capable, reliable choice. Don’t expect it to hold up under professional-level use, but for the homeowner who wants a dependable gas saw without a big investment, it’s worth considering.

Frequently Asked Questions

What is a 45cc chainsaw good for?

A 45cc chainsaw is a solid all-around tool for firewood processing, felling small-to-medium trees (up to about 16–18″ diameter), storm cleanup, and general property maintenance. It has enough power to handle hardwoods without being as heavy or expensive as a professional-grade saw. Most homeowners with an acre or more of wooded property will find the 45cc class does everything they need.

What size bar fits a 45cc chainsaw?

The 16″ to 20″ range is standard for the 45cc class. An 18″ bar is the best everyday choice — long enough to fell most residential trees, short enough to keep the saw manageable. You can run a 20″ bar, but the engine will work harder and the chain will dull faster on dense wood. Going shorter to 16″ is fine for limbing and firewood splitting where a longer bar would just get in the way.

How long does a 45cc chainsaw last?

A well-maintained homeowner-grade 45cc saw should last 10 or more years with moderate use. Professional-quality brands like Husqvarna can last 15–20 years with proper care. The key is regular maintenance: clean air filter, fresh fuel each season, correct bar oil level, and sharp chain. The single biggest killer of chainsaws is running them with a dull chain — it overworks the engine and accelerates wear on every moving part.

Is a 45cc chainsaw powerful enough to fell a large tree?

For trees up to 18–20″ in diameter, yes. Beyond that, a 45cc saw will struggle — the bar length limits your reach and the engine won’t maintain cutting speed through a wide trunk on hardwood. For anything over 20″ in diameter, you’re better served by a 60cc+ professional saw. That said, most residential trees are well within the 45cc range, and for anything larger, felling should involve a certified arborist anyway.

What’s the difference between 40cc and 45cc chainsaws?

About 10–15% more power, which translates to faster cutting through hardwood and better performance with longer bars. A 40cc saw starts to strain on dense oak or large-diameter cuts. A 45cc handles those same jobs more comfortably and with less heat buildup. For light yard work and softwood cutting, the difference is minimal. For hardwood firewood production or felling, the extra displacement is worth it.

How often should I sharpen a 45cc chainsaw chain?

Sharpen after every 2–3 hours of active cutting, or any time the saw stops pulling itself through the wood and starts requiring you to push. Hitting dirt, rocks, or nails dulls a chain instantly — sharpen before continuing any time that happens. Keeping a sharp chain protects the engine, reduces kickback risk, and makes cutting faster. Check out my guide on how to sharpen a chainsaw chain for the full process.

Are 45cc chainsaws safe for beginners?

Yes, with the right precautions. The 45cc class is heavier than entry-level 30–35cc saws, which means kickback requires more physical control. Take a chainsaw safety course before your first use, always engage the chain brake when not actively cutting, and wear full PPE — chaps, helmet with face shield, gloves, and steel-toed boots. The saws on this list all include safety features like chain brakes and throttle interlocks that make them reasonable for new users who respect the tool.

What fuel mix does a 45cc chainsaw use?

Most 45cc gas chainsaws run a 50:1 fuel-to-oil ratio — 50 parts gasoline to 1 part two-stroke engine oil. Always use fresh 89+ octane gas and quality two-stroke oil rated for air-cooled engines. The most common beginner mistake is running straight gasoline with no oil mix, which will seize the engine in minutes. Pre-mixed canned fuel like TruFuel is more expensive but eliminates the mixing error entirely and is worth it if you’re only running the saw a few times a year.

Final Thoughts

The 45cc class hits a sweet spot that most homeowners will never outgrow. Enough power for real work, light enough to run without wearing yourself out, and priced in a range that makes sense for property maintenance without going full professional.

My top pick is the Husqvarna 445 for most homeowners — it’s a true 45.7cc, well-balanced, and backed by a brand with real dealer support. If you want more reach and don’t mind spending a bit more, step up to the Husqvarna 450 Rancher. On a tight budget, the CRAFTSMAN S185 or Poulan Pro PR4218 will get the job done for occasional use. Whatever you choose, keep the chain sharp, use the right fuel mix, and wear your gear. A good saw lasts a long time when you treat it right.