Best String Trimmers 2021

As we show the best string trimmers, carefully go through this guide. You will be needing the knowledge when you decide to get your string trimmers.

What is a String Trimmer?

A string trimmer, strimmer, string trimmer, or weed wacker is a tool that can help you maintain the edge of your lawn. It features a plastic or nylon string that whirls around to cut greener in tight spaces.

Now, you might be wondering what makes it different from an edge. Well, a string trimmer is perfect for maintaining edges that were already created by a different lawn tool – the edger.

An edger is a tool that allows you to create crisp, well-defined lines at the edges of your lawn. The edger will create the “landscape” of your lawn while your trimmer will maintain it. Both are important tools for keeping your lawn nice and clean.

TYPES OF STRING TRIMMERS

Electric Corded

Corded string trimmers are definitely meatier, but they restrict mobility and will have to look around for power outlets everywhere.

Cordless

  • Battery-powered

Cordless electric string trimmers are all the rage now. And they should be. Cordless string trimmers offer you the freedom to move around and about as you please. There’s no hassle of cables or cords, or power outlets whatsoever.

The most common and popular type of cordless string trimmers is the ones that are run by battery. Most of these are lithium-ion batteries, which are super lightweight, efficient, and environment-friendly.

These things can take 30 minutes to 1 to 3 hours to charge and can offer a satisfactory runtime. Having said that, some batteries are seriously scammy and have low runtimes so beware. We recommend getting a string trimmer that comes with a fast charger to replenish your battery cells quicker.

  • Gas-powered

Cordless and gas-powered string trimmers were really popular back in the days. But although more and more people are choosing battery over gas, gas-powered string trimmers are still very popular among specific consumer groups.

Gas-powered trimmers are, as we observed, more powerful than your battery counterparts, but they do have the additional nuisance of mixing gasoline and oil. Also, starting up a gas-powered trimmer can be challenging for some people.

The pulling and wrestling with the ignition string is an exercise. Luckily, most gas-powered trimmers today have ignition technology that allows the machine to start almost immediately without the fight.

STRING TRIMMERS BUYER’S GUIDE

Different Shafts

  • Straight

A string trimmer with a straight shaft can reach under spots like decks, benches, etc.

  • Curved

A string trimmer with a curved shaft feels more natural to the hands and is more comfortable to use.

Height Adjustability

Whether is straight or curved, try and get a shaft that you can extend or cut down in height. This will offer so much more work flexibility, and you can have the kids trim the lawn for you too. Win-win.

The width of cutting path

So what should the width of the string trimmer be? Well, this is a very important point and is something that should relate to the size of your lawn… .and your laziness. If you have a small lawn, then go for a cutting width that is 12 to 14 inches wide.

And, if you have a small to medium lawn size, then look into string trimmers with a cutting path that’s 14 to 16 inches wide. If you are blessed with a large lawn, then look for string trimmers with a cutting path that’s over 16 to 18, or more, inches wide.

The wider the cutting path, the more coverage you get for a lesser time. However, more doesn’t always mean better. We recommend you stick to the lawn to width ratio because a wider cutting path also means a high retail price.

String line

The string line is the very essence and soul of a string trimmer. This string is what trims and cuts and slices through all your unwanted lawn vegetation. Needless to say, getting the properties of the string line right is very important.

Thickness

Let’s start with the width or thickness of the string. Strings sizing from 0.065 inches to 0.085 inches is perfect for light-duty work like standard grass trimming. A string line that’s 0.085 inches to 0.110 inches should get the job done for thick weeds.

Shape

Now, let’s talk about shape. Many new users may not notice this, but the string line dons various types of shapes from round to square. Although round is the most inexpensive and common shape, it lacks a cutting edge.

Eventually, it rips off the vegetation instead of slicing it. Twisted strings work a little better than rounded since it has some edges. Shapes that come with a sharp cutting edge like star, square, etc, are very good at trimming vegetation. But we are particularly a fan of serrated strings which are perfect for tough grass and weeds.

Weight and size

There’s not much to say about the size and weight factor of a string trimmer other than the fact that you need to feel comfortable.

You will be using this machine for quite a while in a day so you need to make sure that the weight feels just right so that you do not wear down or feel exhausted. The size also needs to be perfectly in balance with your height and strength.

Cutting Line

There are a lot of factors you’ll need to consider when looking at the cutting line. A line that’s too thin won’t have much cutting power while one that’s too thick may bog down the motor or engine of the grass trimmer.

Some models have single-line heads which are easier to use since winding new trimming line is simplified.

BEST STRING TRIMMERS

NAMES FEATURES WHERE TO BUY
Craftsman V20 Cordless Electric String Trimmer & Edger

B07KKC6JJF

extended run time

turn to edge

ergonomic telescoping pole

automatic line advance

efficiency

GET IT ON AMAZON
Greenworks STBA40B210 40V String Trimmer Combo Pack

B01CA4PS8C

12″ 0.065 dual-line with auto-feed head to rip through weeds for fast trimming

Lightweight and easy to use

40V 2Ah Li-Ion Battery and charger included

4 Year Limited Warranty

GET IT ON AMAZON
Worx WG163.9 20V Cordless String trimmer

B01DGPH8M8

Type: Electric (battery-powered)

Cutting Diameter: 12″

Line Diameter: 065″

Spool Line Length: 10 ft.

Weight (with battery): ~5.3 lbs

GET IT ON AMAZON
DeWALT DCST925M1 Battery-Powered Weed Eater

B07SKYWZNC

13″ cutting swath with 0.080″ line

Gear drive transmission design that powers through the overgrowth

Variable trigger with high/low-speed control for added power or extended runtime

Lightweight, ergonomic, and balanced design will help you move freely

Part of the 20V MAX* system of tools

GET IT ON AMAZON
GreenWorks 21212 4

B0030GEXUO

Telescoping handle

Lightweight construction

Includes a 3-year warranty

GET IT ON AMAZON
DEWALT DCST920P1 Weed Wacker

B00TL72J2A

Patented gear drive design powers through tough overgrowth

13″ cutting swath with 0.080″ line

Lightweight and ergonomic design maximizes control and minimizes stress on your arms

High-efficiency brushless motor maximizes run time and motor life

GET IT ON AMAZON
BLACK+DECKER LST522 20V MAX Lithium 2-Speed String Trimmer

B019Z72FM4

LBXR2520 battery provides 66% more battery capacity for longer runtime.** (**Compared to LBXR20)

2-speed control lets you boost power or extend runtime.

PowerDrive Transmission™ increases torque for more cutting power at the string.

Easily converts from trimmer to wheeled edger.

GET IT ON AMAZON
EGO Power+ ST1500-S 15-Inch 56-Volt Lithium-Ion Cordless Brushless String Trimmer

B017EHDXAA

56V Lithium-Ion Battery

Weather-resistant protective structure

Bump Feed Head included

Extendable Shaft which can go up to 59 inches

GET IT ON AMAZON
Echo SRM-225 Straight Shaft Gas Trimmer

B005UPNR5A

2 cc professional-grade, 2-stroke engine for outstanding performance play video

59″ straight shaft

Engine vibration-reduction system for operator comfort play video

i-30™ starting system for reduced effort starting play video

Speed-Feed® 400 trimmer head re-loads in seconds without disassembly play video

GET IT ON AMAZON
Ego ST1502-F Power+ 15″ String Trimmer

B0865NH44V

Dual-feed twist line with 0.095 in. diameter

Hi-efficiency brushless motor with variable speed

Weather-resistant construction

Variable speed trigger

Extended aluminum shaft with an in-line grip

GET IT ON AMAZON

Craftsman V20 Cordless Electric String Trimmer & Edger

B07KKC6JJF

V20* Cordless 13-in. WEEDWACKER® String Trimmer/Edger features a high-efficiency motor and is equipped with a 2.0 Ah battery allowing you to take on the tasks at hand. Once the task is complete, conveniently store using the integrated VERSATRACK™ hook with the VERSATRACK™ system (sold separately). The V20* battery platform is compatible with CRAFTSMAN® V20* Outdoor Equipment and Power Tools. You’ll find the complete line of outdoor tools and equipment essentials for a job to make you proud.

PROS CONS
  • Easy conversion from trimmer to edger
  • The string feed button lets too much string out at one time; wasteful
  • 4Ah battery and charger included
  • The battery may not be compatible with older Craftsman V20 tools
  • Adjustable length pole
  • Safety guard may block the cutting view

Greenworks STBA40B210 40V String Trimmer Combo Pack

B01CA4PS8C

The Greenworks 40V Cordless String Trimmer STBA40B210 is hands down one of the smartest and most user-friendly trimmers on our list today. This machine measures 64.5 x 7.5 x 11.8 inches in dimensions and weighs a little under 8 pounds. It has a straight shaft and features a 12-inch wide cutting path. It is super comfortable to use and would be perfect for small-sized lawns. One thing that is nice about the Greenworks 40V Cordless String Trimmer STBA40B210 is that it comes with 2 20V MAX Lithium batteries! Very generous and much needed, we know! And on top of this, each of the battery cells can give you up to 45 minutes of runtime.

PROS CONS
  • Multipurpose; doubles as an edger and blower
  • Complaints of a defective battery
  • Comfortable and easy to use
  • Short lifespan
  • Lightweight and compact
  • Powerful trimmer
  • Quiet operation

Worx WG163.9 20V Cordless String trimmer

B01DGPH8M8

WORX WG163.9 is a battery-powered string trimmer with a cutting swath on 12 inches. It uses a 0.065” string line and does 7,600 RPM at no-load. It’s not something you would describe as powerful but for light jobs like cutting regular grass, it’s sufficient. The unit can be converted into an edger. It’s not the best edger but it does the job.

Although the handle is (telescoping) adjustable it’s still a bit too short for someone who’s tall or has tall limbs. Overall balance is mediocre as weight distribution doesn’t feel quite right.

It’s very lightweight though as it weighs just 5.3 lbs which decreases the significance of previously mentioned flaws by a lot. Overall ergonomics are average. They are not terrible but there is room for improvement

PROS CONS
  • Dual-purpose; serves as an edger
  • Inconsistent runtime
  • Comfortable and easy to use
  • Very low runtime
  • Lightweight and compact
  • Low-quality parts
  • Extendable shaft height
  • Powerful trimmer

DeWALT DCST925M1 Battery-Powered Weed Eater

B07SKYWZNC

The 20V MAX* Cordless String Trimmer features a gear drive transmission design for amplified torque when powering through the overgrowth. Our Cordless String Trimmer provides 13″ of swath with a 0.080″ line. The variable speed trigger offers control, performance, and runtime management. This cordless string trimmer is part of the 20V MAX* battery system and utilizes the same batteries and chargers as your 20V MAX* cordless power tools and equipment.

PROS CONS
  • Excellent build quality and design with top-quality components
  • A tough choice between this model and the Makita for the best premium model
  • A premium brand with an excellent reputation
  • Lightweight and compact
  • 13-inch cutting width
  • 3-year warranty

GreenWorks 21212 4

B0030GEXUO

The Greenworks 21212 is an affordable and functional electric string trimmer with a 4-amp motor. This weed eater is fairly basic in terms of its feature package, which is something you might expect from a cheap weed eater, but it manages to do a lot with its features.

This Greenworks 21212 trimmer is surprisingly versatile and can do a lot with its basic feature package. It isn’t very powerful, but it has a generous four-year warranty that makes it worth a look.

PROS CONS
  • 13” cutting diameter for more efficient performance
  • None
  • Automatic line feed for less downtime
  • Incredibly lightweight 5.2 lb body
  • Powerful 4 amp electric motor

DEWALT DCST920P1 Weed Wacker

B00TL72J2A

The 20V MAX* String Trimmer features a patented gear drive design for amplified torque when powering through the overgrowth. The QuickLoad™ allows for fast and easy line replacement. It provides 13″ of swath with DEWALT’s 0.080″ line. The variable speed trigger offers precise power control as well as performance and runtime management with the Hi/Lo speed control switch. Well, balanced and only 8.5 lbs., the string trimmer is easy to maneuver and puts less stress on the user.

PROS CONS
  • The powerful cordless model that runs on a 20-volt MAX 5.0 Ah lithium-ion battery
  • None
  • Variable speed trigger allows you to control the speed of your tool
  • Hi/Lo switch adjusts for power or longer run-time
  • 13” cutting swatch for faster performance

BLACK+DECKER LST522 20V MAX Lithium 2-Speed String Trimmer

B019Z72FM4

Get the power you need with this two-speed trimmer/edger with extended battery capacity. Power through the tough overgrowth, or reduce speed while you edge for extra runtime. Either way, there’s no bumping required thanks to the Automatic Feed Spool.

PROS CONS
  • Variable speeds for softer and tougher weeds
  • If you live somewhere with electricity issues, this is a problem due to the 1 hour run time.
  • Lightweight, easy to move around and use
  • One hour battery life after a full charge
  • Easy on your back, designed for comfort

EGO Power+ ST1500-S 15-Inch 56-Volt Lithium-Ion Cordless Brushless String Trimmer

B017EHDXAA

The EGO Power+ ST1500-S is a great option for people who have medium-sized yards and need their trimmers to work for a longer amount of time as well as have more power. This trimmer has a 56V battery which makes sure that your trimmer works for a very long time for you to get your work done easily. The structure and design of the trimmer are made to protect it from wear and tear. It has a 0.095-inch diameter dual twisted line which has significantly more strength than that of other trimmers. This line does not get eaten up that fast and lasts much longer than standard lines.

PROS CONS
  • Long-lasting line, no need to keep replacing it
  • Batteries are expensive if you run out of the ones provided
  • Larger swath covers more area and cuts faster
  • No on/off button, have to pull the trigger
  • Can trim hedges and harder weeds as well
  • Easy to use and move around
  • Rechargeable

Echo SRM-225 Straight Shaft Gas Trimmer 

B005UPNR5A

The Echo SRM-225 String Trimmer is another gas-powered model on our list. This one comes with a less powerful engine – only 21.2cc though it does offer the same 17-inch cutting swath. It comes with a 2-stroke engine, a line advance bump feed, and an anti-vibration handle. It starts quickly and can cut through thicker grass if you use a .08 line diameter.

Compared to the Husqvarna, the shaft on this model is longer and more ideal for people taller than 6 feet. The balance and weight of the trimmer are perfect while the easy winding system is very convenient. However, it isn’t as powerful as we’d like especially at this price point (over $400 brand new on Amazon). And it is quite heavy.

PROS CONS
  • Anti-vibration handle
  • Heavy
  • Long shaft
  • Very expensive
  • Fast start
  • Not powerful enough

Ego ST1502-F Power+ 15″ String Trimmer

B0865NH44V

This cordless model is on our list because it is powerful enough to match a gas-powered model, able to easily cut through 1-inch thick bamboo without slowing down, but doesn’t produce the noise and exhaust fumes. It features a variable speed trigger to allow for different cutting conditions. While it isn’t light at around 10 pounds, it feels balanced and comfortable in your hand. It has a longer runtime than most cordless models; it can completely cut through a 3,400 square foot lawn on a single battery charge with its 15-inch cutting swath.

The charging time is quite fast too – only 40 minutes. Other highlights include the dual-line head, the 0.095-inch trimmer line, and a bump feed feature.

PROS CONS
  • 15-inch cutting swath
  • The battery indicator only lights up at 15%
  • Powerful
  • Taking the spool off is hard
  • Quiet
  • Not ideal for edging

CONCLUSION

Our detailed and honest review of the Best string trimmers is as diverse as it gets. We have everything from cheap to fancy, basic to feature-packed, curved to straight. A little something for everybody. You won’t go home empty-handed, and that’s a promise!

With this, it’s a wrap to our take on some of the Best string trimmers in the market! We hope we were able to answer and address most of your questions.