Skip to content
String Trimmers · How-to guide

How to Choose a String Trimmer: A Decision Framework

A practical framework for choosing a string trimmer, covering power source, battery voltage, cutting swath, shaft type, and how yard size and growth density should actually drive the decision.

Based on manufacturer specs, independent reviews and owner reports. No paid placements and no invented test scores. How we research

On this page
What matters

Key decision factors

Step-by-Step Guide

Walk your property and estimate square footage or acreage, and note whether you're dealing with maintained lawn grass, occasional weeds, or genuinely overgrown patches. This single factor narrows the field more than any spec sheet comparison.

Battery vs. Gas

For most residential yards, a battery trimmer is the right call. It starts instantly, needs no fuel mixing, runs quieter, and has effectively no ongoing maintenance beyond charging.

Matching Voltage and Battery Size to Your Yard

Voltage alone doesn't tell the whole story, battery capacity matters just as much. A 40V trimmer with a large battery can outperform a 56V trimmer with a small one under sustained load.

Swath Width and Shaft Type

Match swath width to yard size rather than buying the widest option available. A wide swath on a small, tight yard just adds unnecessary weight and reduces maneuverability around beds and obstacles.

See Also

String Trimmers Buying Guide Best String Trimmers for Small Yards

Frequently Asked Questions

Best String Trimmers for Edging: Top Picks for Clean Lawn LinesString Trimmers · List Best String Trimmers for Small Yards: Compact and Lightweight PicksString Trimmers · List Best String Trimmers for Steep Hills and SlopesString Trimmers · List

Battery vs. Gas

For most residential yards, a battery trimmer is the right call.

It starts instantly, needs no fuel mixing, runs quieter, and has effectively no ongoing maintenance beyond charging.

Gas trimmers earn their place on larger properties or where heavy, regular brush clearing is part of the routine.

The tradeoff is fuel mixing, periodic carburetor and air filter maintenance, and more noise and weight.

Matching Voltage and Battery Size to Your Yard

Voltage alone doesn't tell the whole story, battery capacity matters just as much.

A 40V trimmer with a large battery can outperform a 56V trimmer with a small one under sustained load.

That said, as a general rule, 40V systems suit small to medium yards well, and 56V systems like EGO's hold up better on larger yards or thicker growth.

Swath Width and Shaft Type

Match swath width to yard size rather than buying the widest option available.

A wide swath on a small, tight yard just adds unnecessary weight and reduces maneuverability around beds and obstacles.

Straight shafts offer better reach and, in most cases, compatibility with attachment systems.

Curved shafts are lighter but generally less versatile.

Put it into practice

Top string trimmers we recommend

See all
Answers

Frequently asked questions

Battery or gas, which should most homeowners choose?

Battery, for the large majority of residential yards under half an acre with typical grass and moderate weeds. Gas trimmers make more sense for larger properties, regularly overgrown lots, or heavy brush clearing where runtime and raw power outweigh the convenience of a cordless tool.

Does a higher voltage battery always mean a better trimmer?

Not automatically, but it's a reasonable proxy for cutting power. A 56V system like EGO's generally delivers more torque than a 40V system at the same battery capacity. What matters more in practice is the combination of voltage and amp-hours, a 40V trimmer with a large battery can outperform a 56V trimmer with a small one on sustained cutting.

What cutting swath width do I actually need?

12 to 13 inches is adequate for a small yard under a quarter acre. 15 inches suits a medium yard and covers ground more efficiently. 17 inches or more, typically found on gas trimmers, makes the most sense for large or overgrown properties where fewer passes meaningfully saves time.

Is a straight shaft or curved shaft better?

Straight shafts give better reach under bushes and along walls, and they're required for most attachment systems like edgers or brush cutters. Curved shafts are typically lighter and slightly easier to maneuver for basic trimming but offer less versatility. Most trimmers reviewed in this category use a straight or telescoping straight shaft.

Keep researching

Related guides & best picks