The Best Chainsaw for Firewood: Size, Bar and Models

What cutting firewood actually asks of a saw

Most chainsaw advice is written around felling. Firewood work is a different job. Once the tree is down — or once a load of logs has been tipped in the yard — everything that remains is bucking: cutting stems into stove-length rounds, again and again, for hours. A round is typically 20 to 40 cm across and 30 to 50 cm long, and a single cord means well over a hundred cuts.

That shifts which specifications matter:

• Cut cycle, not cut reach. The saw makes short crosscuts into wood far narrower than the bar. Extra bar length buys nothing here and costs weight, chain drag and sharpening time.
• Sustained load. Bucking holds the engine near full throttle for long stretches with few pauses. Cooling, air filtration and tank capacity matter more than peak power figures.
• Weight carried all day. A 1 kg difference is invisible on a spec sheet and very visible after the fourth hour.
• Vibration. Firewood sessions are long and continuous, which is exactly the exposure pattern that drives hand-arm vibration risk. See our guide to chainsaw vibration and noise levels.

Why 45-55 cc with a 40-45 cm bar is the sweet spot

Below roughly 45 cc, a saw has to be fed slowly through a 35 cm oak round. It will do the job, but the cut takes longer, the engine spends more time in the load band where it heats up, and the operator ends up pushing — which is how chains get dull and cuts get crooked.

Above roughly 55 cc, the extra displacement stops helping. The rounds are still 30 cm; what you gain in cut speed you pay for in weight. The Stihl MS 311 is 59.0 cc and 3.1 kW, but it also weighs 6.26 kg without bar and chain — against 4.8 kg for the Stihl MS 251 at 45.9 cc. Lifting the heavier saw onto a sawbuck two hundred times is a real cost.

The 40-45 cm bar follows the same logic. It clears a 40 cm round in a single pass from one side, which is all a firewood saw ever needs to do. Manufacturers agree: the MS 251 ships with a 45.7 cm bar, the Husqvarna 445S with 45 cm, the Echo CS-4010 with 45.72 cm.

Manufacturer use classes back this up too. Stihl files the MS 271 under Farm/Firewood and describes the MS 291 as a saw for harvesting firewood; Husqvarna describes the 450S Rancher as a landowner saw for felling, cutting, limbing and cutting firewood.

A few cords a year

If you burn a stove for evenings and weekends and process wood that someone else delivered, a 40-46 cc saw is enough.

The Husqvarna 435 is the lightest sensible option at 4.44 kg and 1.64 kW, with a 40 cm bar and a 0.325 chain. Its published maximum bar is 45.72 cm, which is worth knowing: fitting anything longer overloads it. The Echo CS-4010 is close in displacement at 41.6 cc but ships with a 45.72 cm bar and weighs 4.26 kg, with a 0.349 l fuel tank and a 0.231 l oil tank — that ratio matters, because a firewood saw empties its oil tank roughly as fast as its fuel tank.

The Stihl MS 251 sits at the top of this group: 45.9 cc, 2.2 kW, 4.8 kg, 45.7 cm bar. Stihl classes it for homeowners and light-duty work but describes it explicitly as a firewood saw. The Craftsman CMXGSAMY42N8 covers similar ground at 42 cc with a 45.72 cm bar.

Heating a house

If the stove is the primary heat source and you cut several cords a season, move up to the 50-56 cc class. The gain is not top speed — it is that the saw is no longer working at its limit, so it runs cooler and holds its cut rate through a long session.

The Husqvarna 450S Rancher is the reference point: 50.2 cc, 2.4 kW, 4.99 kg, 50 cm bar, 18.51 m/s chain speed. The Husqvarna 445S is the same weight and displacement with a shorter 45 cm bar and 2.2 kW — the better choice if your rounds are consistently under 40 cm. The Stihl MS 271 matches at 50.7 cc and 2.6 kW but is noticeably heavier at 5.6 kg, and the Makita EA5001PREL delivers 2.9 kW from 50 cc at 5.4 kg with a 0.47 l fuel tank.

Step up once more only if you are also felling or cutting hardwood over 45 cm. The Stihl MS 291 (55.7 cc, 2.8 kW, 5.6 kg) and the Husqvarna 455 Rancher (55.5 cc, 2.61 kW, 5.99 kg, 3/8 chain, 20 m/s) are the usual answers. The Echo CS-590 Timber Wolf at 59.8 cc and 5.99 kg, with a 0.645 l tank, is built for the same farm-and-ranch duty cycle.

When a battery saw is enough

Battery saws now cut firewood properly, with two conditions: the wood is already down and stacked near an outlet, and you work in sessions rather than all day. Runtime, not cutting ability, is the limit.

The Husqvarna 435i is the clearest fit — Husqvarna lists it for light landowner work including cutting firewood — at 1.79 kW, 40.6 cm bar, 21.01 m/s chain speed and 2.7 kg, which is 1.7 kg lighter than the petrol 435. The Husqvarna Power Axe 350i takes a longer 45.7 cm bar at 3.5 kg, though its 11.8 m/s chain speed is roughly half that of the 435i, so cuts are slower. The Greenworks 80V 18 in pairs a 45.72 cm bar with 2.0 kW and 20 m/s at 4.08 kg. Also worth comparing: the Makita XCU04PT (40.64 cm, 20.0 m/s, 3.76 kg), the Stihl MSA 220 (1.7 kW, 40.6 cm) and the EGO CS1610 (40.64 cm, 20 m/s).

The noise difference is the underrated argument. The 435i is rated at 90 dB(A) sound pressure against 102 dB(A) for the petrol 435 — a 12 dB gap, and in noise terms that is a very large one.

What to avoid

• A long bar on a small saw. A 50 cm bar on a 40 cc engine cuts slower than a 40 cm bar on the same saw and stresses it. Check the published maximum bar length before buying a longer one.
• Buying on displacement alone. The Husqvarna 460 Rancher is 60.3 cc with a 60 cm bar — excellent for felling, more saw than bucking rounds requires, and 5.99 kg to hold up all afternoon.
• Top-handle saws. The Husqvarna T525 and similar T-series models are designed for arborists working one-handed from a rope. They are not ground-level firewood tools.
• Ignoring the oil tank. Long continuous bucking is the hardest duty cycle there is on bar oil. A saw whose oil tank runs dry well before the fuel tank will need topping up mid-tank.

Still narrowing down? Start with how to choose a chainsaw, or put two candidates side by side in the comparisons.

Want a ranked shortlist instead of the full explanation? See Top Chainsaws for Firewood.