How to Choose a Chainsaw: Bar Length, Power & Safety
By The DIYPicks Team ยท Updated July 2026
Choosing a chainsaw comes down to matching bar length and power to the wood you actually cut, then respecting that it is the most dangerous tool in the yard. This guide walks through sizing, battery vs gas, and the safety gear and technique that keep all your fingers. It is spec-based buying guidance, not a substitute for hands-on training.
Match bar length to your task
The bar is the metal guide the chain rides on, and its length caps what you can cut in one pass. A practical rule: pick a bar about 2 inches longer than the diameter of the wood you cut most often. Going much longer than you need makes the saw heavier, harder to control, and more prone to kickback.
For pruning and limbing, a 12โ14 inch bar (like the EGO CS1400) is plenty and easy to handle. For firewood and small tree felling, a 16-inch bar (like the Echo CS-310) cuts logs up to ~14 inches. Homeowners rarely need more than 16โ18 inches; larger bars belong to experienced users felling big timber.
Battery vs gas power
Battery saws start instantly, run quietly, need no fuel mixing, and are ideal for occasional limbing and storm cleanup. Their limits are bar length and runtime โ you cut until the pack dies, then recharge or swap. A 56V platform like EGO is a good fit for most suburban yards.
Gas saws deliver more sustained power and unlimited runtime as long as you have fuel, making them better for regular firewood cutting or felling. The cost is 2-stroke fuel mixing, pull-starting, more maintenance, noise, and exhaust. Corded electric saws exist too but tether you to an outlet.
Weight, features, and fit
A saw you can control safely beats a more powerful one you can barely hold up. Check dry/with-battery weight and how balanced it feels; fatigue causes accidents. Look for tool-free chain tensioning, an automatic bar oiler, and a low-kickback bar and chain โ all standard on the homeowner saws above.
Consider the ecosystem too: if you already own EGO or another 56V battery platform, a bare-tool saw saves money. If you have no batteries, factor the kit price or a gas saw's lower entry cost into the decision.
Safety: PPE, kickback, and technique
Chainsaws cause tens of thousands of injuries a year, most to the hands and legs. Never run one without full PPE: a helmet with face shield and hearing protection, cut-resistant chaps or trousers, sturdy gloves, and steel-toe boots. Eye protection is non-negotiable.
Kickback โ the bar snapping up and back toward you โ is the leading cause of serious injury. It happens when the upper tip of the bar (the 'kickback zone') contacts wood or another branch. Avoid cutting with the bar tip, keep the chain sharp and properly tensioned, use a saw with a chain brake, and hold the saw with both hands and thumbs wrapped. Cut at waist height, keep firm footing, never cut above shoulder height, and never work alone or when tired. For overhead limbs use a pole saw from the ground, and stay well clear of power lines. If a job involves large trees, leaning trunks, or anything near structures or lines, hire a professional.
Maintenance that keeps you safe
A dull chain forces you to push harder, which increases kickback risk and ragged cuts โ sharpen or replace it regularly. Check chain tension before each use (a loose chain can derail; an over-tight one strains the bar) and keep the bar-oil reservoir topped so the chain stays lubricated.
On gas saws, use fresh, correctly mixed 2-stroke fuel and clean the air filter periodically. On battery saws, store packs at moderate temperatures. Always stop the engine or remove the battery before clearing debris, adjusting the chain, or transporting the saw.
See our top picks
Read a full review
Frequently Asked Questions
- What size chainsaw does a homeowner really need?
- Most homeowners are well served by a 14โ16 inch bar. A 14-inch battery saw handles limbing and small firewood; a 16-inch gas saw handles regular firewood and small tree felling. Only go larger if you routinely cut big trunks and have the experience to control a bigger saw.
- What safety gear is essential for chainsaw use?
- At minimum: a helmet with face shield, hearing protection, cut-resistant chaps or trousers, protective gloves, and steel-toe boots. A saw with a chain brake and low-kickback chain adds critical protection. Never operate a chainsaw without PPE.
- What is kickback and how do I prevent it?
- Kickback is when the bar suddenly jumps up and back toward the operator, usually from the tip contacting wood. Prevent it by never cutting with the upper bar tip, keeping the chain sharp and tensioned, using a chain brake, gripping with both hands and wrapped thumbs, and cutting at waist height with solid footing.