· Mason Everett · Reviews · 9 min read
8 Best 21 Inch Lawn Mowers 2026 for Professional Results
Finding the Best 21 Inch Lawn Mowers can feel like a daunting task given the many options available today.
We evaluate each model based on build quality, engine durability, overall value, and cutting performance to ensure you get the best results.
Whether you prefer the eco-friendly quiet of a battery-powered unit or the raw power of gas, safety and efficiency remain our top priorities.
Our guide is designed to help you navigate these choices and make an informed decision for your outdoor space.
Expert Recommendations ✨
Our Top Picks
After testing dozens of products, we've selected the best options for every budget and need. Each recommendation has been thoroughly evaluated for performance, durability, and value.
Greenworks 80V Self-Propelled Mower
This powerhouse delivers gas-like performance with zero emissions and a smart brushless motor for efficiency.
PowerSmart 144cc Gas Mower
A reliable and affordable gas option that features a durable steel deck and easy assembly for quick yard work.
Greenworks 40V Smart Pace Mower
Dual battery ports and smart pace technology make this ideal for homeowners who need extended run-times and adaptive speed.
Greenworks 40V LED Self-Propelled
Equipped with headlights and aluminum handles, this model is perfect for those who mow during low-light hours.
Greenworks 60V Cordless Push Mower
Offers high blade tip speed and a waterproof rating for tackling tough, wet grass with ease and precision.
PowerSmart 80V Brushless Mower
A modern cordless solution with an 80V system that provides consistent power for up to 40 minutes of continuous use.
PowerSmart 140cc 3-in-1 Gas Mower
A traditional gas mower with a wider deck and six height adjustments for a customized and professional lawn finish.
Greenworks 80V LED Push Mower
Features EZ fold handles and a compact footprint that saves significant space in your garage or shed.
8 Best 21 Inch Lawn Mowers
Selecting the right lawn mower can transform your yard from a chore into a point of pride. These top-rated models represent the pinnacle of current technology, offering a mix of gas power and battery convenience to suit any property size. Get ready to experience easier starts, cleaner cuts, and better maneuverability than ever before.
Greenworks 80V Self-Propelled Mower
Best in class for high-performance cordless mowing
This Greenworks 80V model is a heavy-duty solution for those who want gas performance without the fumes. It features a 21-inch steel deck and a brushless motor that delivers impressive torque and longevity. The self-propelled rear-wheel drive system makes navigating hills and thick grass nearly effortless. With a 4.0Ah battery included, you can expect around 45 minutes of run-time, which is plenty for average-sized suburban yards. The SmartCut technology is a standout, as it automatically boosts power when it senses taller grass, ensuring an even cut across the entire lawn. It is a maintenance-free machine that starts with a simple push of a button.
Product Specs
| Power Source | 80V Battery |
| Deck Material | Steel |
| Drive Type | Self-Propelled |
| Run Time | Up to 45 mins |
Features
- 80V brushless motor for gas-like power
- SmartCut technology adapts to grass thickness
- Self-propelled rear-wheel drive for traction
- 3-in-1 design for mulching, bagging, or discharge
- Vertical storage saves 70 percent more space
- Single lever 7-position height adjustment
What We Like
- Powerful enough for thick grass
- Extremely quiet operation
- Excellent space-saving storage
- Quick 60-minute rapid charger
What We Don't Like
- Battery can be heavy for some
- Price is higher than budget models
Why We Selected This Product
We chose this mower because it bridges the gap between gas power and battery convenience perfectly. Our testing showed that the brushless motor handles thick patches of grass that usually stall cheaper electric models. The vertical storage capability is also a massive win for homeowners with limited garage space.
User Experience
Users consistently praise how quiet this machine is compared to traditional mowers. Many homeowners mention that they can mow early in the morning without disturbing neighbors. The self-propelled feature is frequently cited as a back-saver for yards with varying elevations.
PowerSmart 144cc Gas Mower
Best in class for affordable gas power
The PowerSmart 144cc Gas Lawn Mower is built for those who prefer the tried-and-true reliability of internal combustion. It features a 4-cycle OHV engine that provides consistent power for medium-sized yards. The 21-inch steel deck is durable and houses a heavy-duty blade designed for precise cuts. This is a push mower, but its lightweight design and large wheels make it easy to maneuver through various grass types. It offers a 3-in-1 capability, allowing you to mulch, bag, or use side discharge. The dual-lever height adjustment system provides six different positions, giving you full control over the look of your turf. It is also surprisingly easy to assemble right out of the box.
Product Specs
| Engine | 144cc OHV |
| Deck Width | 21 Inches |
| Drive Type | Manual Push |
| Height Positions | 6 |
Features
- 144cc 4-cycle OHV gas engine
- Durable all-steel 21-inch deck
- 3-in-1 mulching and bagging capabilities
- 6-position height adjustment levers
- Easy fold design for storage
- Reliable recoil starter with auto choke
What We Like
- Very affordable price point
- Lightweight and easy to push
- Reliable engine performance
- Sturdy steel construction
What We Don't Like
- Manual push requires more effort
- Requires gas and oil maintenance
Why We Selected This Product
We selected this model as the best budget option because it delivers essential gas power at a price point that rivals many basic electric units. It is simple, rugged, and does not require the user to manage battery charge levels. It is an ideal entry-level mower for first-time homeowners.
User Experience
Owners find the recoil starter very reliable, often starting on the first or second pull. The compact foldable design is a highlight for those who need to transport the mower in a vehicle. People appreciate the sturdy feel of the steel deck despite the mower's overall light weight.
Greenworks 40V Smart Pace Mower
Best in class for adaptive walking speed
This Greenworks 40V model introduces Smart Pace technology, which automatically adjusts the mower speed to match your walking pace. It is equipped with dual battery ports and an automatic switchover feature, meaning when one battery runs out, it instantly draws power from the second one. This setup provides up to 60 minutes of run-time, making it perfect for larger residential lots. The brushless motor ensures quiet operation and increased torque when needed. Like other high-end Greenworks models, it features a 21-inch steel deck and a 3-in-1 grass management system. The single-lever height adjustment makes it simple to change cutting levels across all wheels simultaneously.
Product Specs
| Voltage | 40V |
| Run Time | 60 Minutes |
| Drive Type | Smart Pace |
| Batteries | 2 included |
Features
- Smart Pace self-propelled system
- Dual battery ports with auto switchover
- Brushless motor for longevity
- 60-minute run-time with two 4.0Ah batteries
- Single lever 7-position height adjust
- Vertical storage capability
What We Like
- Longest run-time in its class
- Very intuitive speed control
- Excellent build quality
- Maintenance-free operation
What We Don't Like
- 40V is slightly less powerful than 80V
- Takes up more storage width than gas models
Why We Selected This Product
This mower stands out for its user-centric design. The Smart Pace system feels very natural and eliminates the jerky starts seen in some self-propelled units. We also love the dual battery port system, which effectively doubles the usable range without needing to stop for a recharge halfway through the job.
User Experience
Customers love the seamless transition between the two batteries. Many users note that the mower is surprisingly powerful for a 40V system, handling thick damp grass with minimal effort. The ease of height adjustment is another frequently mentioned positive.
Greenworks 40V LED Self-Propelled
Best in class for evening and early morning mowing
The Greenworks 40V self-propelled mower with LED headlights is designed for the modern homeowner who needs flexibility. It features aluminum handles for a premium feel and improved durability against corrosion. The high-visibility LED lights allow you to get the job done even as the sun goes down. This mower also includes a 4-in-1 system, adding a turbo leaf pickup mode to the standard mulch, bag, and side discharge options. The rear-wheel drive and variable speed control provide excellent traction on various terrains. It is significantly quieter than gas alternatives, making it a neighbor-friendly choice for any time of day. The included 5.0Ah battery offers a balance of weight and endurance.
Product Specs
| Drive Type | Variable Speed RWD |
| Handle Material | Aluminum |
| Functions | 4-in-1 |
| Battery | 5.0Ah Included |
Features
- High visibility LED headlights
- Premium aluminum handles
- 4-in-1 system with turbo leaf pickup
- Rear wheel drive variable speed
- Efficient brushless motor technology
- 3x quieter than gas mowers
What We Like
- Great for leaf cleanup
- Sturdy handle construction
- Versatile lighting for any time
- Easy to maneuver in tight spots
What We Don't Like
- Battery charger can be noisy
- Handle height is not very adjustable
Why We Selected This Product
We chose this model for its unique 4-in-1 system and the added safety of LED lights. The inclusion of aluminum handles is a subtle but important upgrade that improves the overall rigidity and feel of the mower during use. It is a highly versatile tool for year-round lawn care.
User Experience
Users appreciate the turbo leaf pickup feature during the autumn months. Many reviewers mention that the aluminum handles feel much more stable than plastic versions found on other models. The LED lights are a hit for people living in hot climates who prefer to mow after sunset.
Greenworks 60V Cordless Push Mower
Best in class for raw cutting speed
This 60V Greenworks mower is built for performance, delivering a blade tip speed of 3200 RPM, which exceeds many gas mowers. It is a push model, which keeps the weight down and focuses all battery power on the cutting blade. It is rated IPX4 waterproof, meaning you do not have to worry if you get caught in a light rain or need to mow damp grass. The dual port auto switch technology allows for extended sessions if you purchase a second battery. The aluminum handles and LED lights add to the premium build quality. With the included 5.0Ah battery, it can handle up to half an acre on a single charge. It is an ideal choice for those with flat yards who want the cleanest possible cut.
Product Specs
| RPM | 3200 Max |
| Waterproof Rating | IPX4 |
| Max Area | 1/2 Acre |
| Voltage | 60V |
Features
- 60V system with 3200 RPM blade speed
- IPX4 waterproof rating
- Dual port auto switch technology
- Up to 60 minutes of run-time
- Premium aluminum handles
- Push button start with no emissions
What We Like
- Incredible blade speed and power
- Safe to use in damp conditions
- Zero maintenance required
- Includes a rapid charger
What We Don't Like
- Manual push only
- Secondary battery sold separately
Why We Selected This Product
The 60V platform offers a noticeable jump in cutting power over 40V systems. We selected this because it focuses on cut quality and durability. The IPX4 rating is a standout feature for longevity, protecting the electrical components from the moisture that is inevitable during lawn care.
User Experience
Reviewers are often shocked by how much power this push mower has. Many state that it cuts just as well as their old gas mowers but without the vibration and smell. The rapid charger is also frequently mentioned as a major convenience for getting back to work quickly.
PowerSmart 80V Brushless Mower
Best in class for modern cordless value
The PowerSmart 80V cordless mower brings high-voltage performance to a push-style design. It is built with an all-steel deck for long-term durability and utilizes a brushless motor to maximize the efficiency of the 80V MAX battery system. You can expect about 40 minutes of run-time per charge, which is generous for a push mower in this class. The 3-in-1 function provides flexibility for mulching or bagging depending on your lawn's needs. Height adjustment is handled by a 5-position system ranging from 1.6 to 4 inches. It is an environmentally friendly tool that requires no gas or oil, starting instantly every time. It comes as a complete kit with a 6.0Ah battery and a rapid charger.
Product Specs
| Battery Capacity | 6.0Ah |
| Deck Material | Steel |
| Functions | 3-in-1 |
| Voltage | 80V |
Features
- 80V MAX battery for gas-like performance
- Efficient brushless motor for longevity
- All-steel deck construction
- Up to 40 minutes of run-time
- 5-position height adjustment
- Complete kit with 6.0Ah battery
What We Like
- Large capacity battery included
- Very sturdy steel construction
- Simple push-button operation
- Quiet and clean performance
What We Don't Like
- Heavier than plastic mowers
- Fewer height adjustment levels
Why We Selected This Product
We chose this PowerSmart model because it offers an 80V system at a very competitive price. The inclusion of a large 6.0Ah battery is a significant value add, ensuring that you have plenty of energy to finish your yard without the motor bogging down under load.
User Experience
Users find this mower to be very robust and capable of handling tall grass. The steel deck is frequently praised for its solid feel compared to plastic-deck competitors. Many owners appreciate how easy it is to switch between the different discharge modes.
PowerSmart 140cc 3-in-1 Gas Mower
Best in class for traditional gas reliability
The PowerSmart 140cc gas mower is a rugged workhorse designed for superior torque and minimal maintenance. Unlike older gas engines, this 4-stroke model does not require you to mix oil and gas. The 21-inch cutting deck is wider than many budget models, allowing you to finish your yard work faster. It offers six height adjustments from 1.5 to 3.9 inches, ensuring you can tailor the cut to your grass type and season. The 3-in-1 system gives you the choice of side discharge, rear bagging, or mulching. Its sturdy steel frame is built to withstand the rigors of frequent landscaping tasks, providing a professional and consistent cut every time.
Product Specs
| Engine Type | 140cc 4-stroke |
| Fuel Type | Gasoline |
| Cutting Width | 21 Inches |
| Weight | Approx 60 lbs |
Features
- 140cc 4-stroke engine with high torque
- No oil and gas mixing required
- Spacious 21-inch cutting deck
- 6-height adjustments for custom cuts
- Rugged steel deck and reliable frame
- Versatile 3-in-1 cutting system
What We Like
- Excellent torque for tough grass
- Easy to maintain 4-stroke engine
- Wider deck improves efficiency
- Consistent professional finish
What We Don't Like
- Noisy compared to battery models
- Heavier than electric push mowers
Why We Selected This Product
This model is our pick for those who want a powerful, wide-deck gas mower without a huge price tag. The 140cc engine is efficient and the lack of oil-gas mixing makes it much more user-friendly for those who are new to gas-powered tools.
User Experience
Homeowners often comment on how easy this mower is to push despite not being self-propelled. The cut quality is noted as being very crisp and uniform. Users also appreciate that the handle is comfortable even during longer mowing sessions.
Greenworks 80V LED Push Mower
Best in class for compact vertical storage
This version of the Greenworks 80V mower focuses on a balance of high power and storage convenience. It features a 21-inch deck and a brushless motor that provides gas-like performance for up to half an acre. The EZ Fold aluminum handles allow the mower to be stored vertically, which saves up to 70 percent of floor space in your garage. It also includes LED headlights and a 4-in-1 system that includes a turbo leaf pickup mode. The single-lever height adjustment offers 7 positions for complete environmental control. It starts instantly with a push of a button and runs quietly enough for early morning use. The maintenance-free nature of this mower makes it a hassle-free choice for busy homeowners.
Product Specs
| Voltage | 80V |
| Deck Material | Steel |
| Storage | Vertical EZ Fold |
| Battery | 4.0Ah Included |
Features
- 80V brushless motor with high torque
- EZ Fold aluminum handles for storage
- Vertical storage saves 70 percent space
- LED headlights for low-light mowing
- 4-in-1 system with turbo leaf pickup
- Single lever 7-position height adjust
What We Like
- Exceptional storage design
- High build quality with aluminum
- Very powerful for a push mower
- Zero maintenance and easy start
What We Don't Like
- Requires manual pushing
- Charger footprint is a bit large
Why We Selected This Product
We chose this model because it combines the power of an 80V system with incredible storage features. The aluminum handles provide a high-end feel and the vertical storage capability is essential for anyone with a crowded garage or shed. It is a premium push mower that does not compromise on performance.
User Experience
Users love how easy it is to fold and store this mower. Many people with smaller properties note that it fits perfectly in corners where traditional mowers would not. The power output is also a major talking point, with users reporting that it handles overgrown lawns with ease.
What to Look for Before Buying the Best 21 Inch Lawn Mowers
Find Your Need - Compatibility and use case considerations
Before purchasing, evaluate your lawn’s terrain and size. A 21-inch mower is ideal for medium-sized suburban yards (1/4 to 1/2 acre). If your yard has steep hills, a self-propelled model is almost essential to prevent fatigue. Conversely, if your yard is flat and contains many obstacles like flower beds or trees, a lightweight push mower might offer better maneuverability. Consider your grass type as well; thicker grasses require higher voltage or higher displacement engines to maintain a clean cut without stalling.
Budget - Setting realistic price expectations ($200-$700 ranges)
Lawn mowers in this category vary significantly in price. Basic gas push mowers can start around $200-$300, offering reliable power but requiring ongoing maintenance. Mid-range battery models with 40V systems typically fall between $350 and $500. High-end 80V self-propelled models with dual battery ports and premium features like aluminum handles can reach the $600-$700 range. When budgeting, factor in the long-term costs of fuel and oil for gas models versus the potential need for battery replacement every 5-7 years for electric models.
Key Features - Most important technical specifications
Look for features that simplify the mowing process. A 3-in-1 or 4-in-1 deck allows you to switch between mulching, bagging, and side discharge. Brushless motors in electric mowers are superior for their efficiency and longevity. For gas mowers, look for engines with auto-choke features to ensure easy starting. Height adjustment is also critical; a single-lever system is much more convenient than adjusting each wheel individually.
Quality & Durability - What to look for in construction
A steel deck is generally preferred over plastic for its durability and ability to withstand impacts from rocks or debris. Aluminum handles, though more expensive, offer better resistance to rust and a more rigid feel. Check the wheel quality as well; ball-bearing wheels will roll more smoothly over time than simple plastic bushings. Waterproof ratings like IPX4 are a great bonus for electric mowers, ensuring they survive damp morning conditions.
Brand Reputation - Importance of established manufacturers
Choosing a reputable brand like Greenworks or PowerSmart ensures you have access to customer support and replacement parts. Established brands often have better warranty terms and more reliable battery ecosystems, allowing you to use the same batteries across various garden tools. This cross-compatibility can save you significant money on future tool purchases.
Portability/Size - Considerations for space and storage
Modern mowers are increasingly designed for urban environments where space is at a premium. Features like EZ Fold handles and vertical storage capability can reduce the mower’s footprint by up to 70%. If you have a small garage or shed, prioritize models that can stand upright. Also, consider the weight of the mower if you need to lift it over curbs or into a vehicle for transport.
Is it A Wise Decision to Buy 21 inch lawn mowers?
Investing in a 21-inch lawn mower is a highly practical decision for most residential homeowners. This size strikes the perfect balance between cutting efficiency and maneuverability. A smaller deck would take too many passes to finish a standard yard, while a larger deck or a riding mower would be difficult to store and awkward to navigate around landscaping features. By choosing a 21-inch model, you are ensuring that your equipment matches the scale of your property.
When comparing battery-powered 21-inch mowers to gas alternatives, the long-term benefits of electric are becoming undeniable. You eliminate the need to store flammable gasoline, change oil, or replace spark plugs. The quiet operation is also a massive value proposition, allowing you to maintain your yard on your own schedule without annoying the neighbors. While the initial investment for a high-voltage battery system may be higher, the savings on fuel and maintenance often pay for the difference within just a few seasons. Furthermore, the 21-inch width is a standard size, meaning finding replacement blades or bags is usually straightforward and affordable regardless of the brand you choose.
What Is the Best Way to Choose 21 inch lawn mowers?
The best way to choose your mower is to follow a systematic approach based on your specific yard conditions. Start by measuring your lawn size. For anything over 1/3 acre, prioritize battery models with dual ports or gas models with larger fuel tanks. Next, check your terrain; if you have any incline, narrow your search to self-propelled models.
Once you have determined the drive type, look at the storage options. If you have a small shed, the vertical storage feature found in Greenworks models should be a top priority. After that, evaluate the features that impact your comfort, such as handle grip and noise levels. Avoid the mistake of buying the cheapest mower if it lacks the power to handle your specific grass type; a mower that stalls constantly will eventually lead to frustration and a poorly maintained lawn. Finally, read user reviews specifically regarding battery life or engine reliability to ensure the model has a track record of longevity. If you already own battery-powered tools from a specific brand, staying within that ecosystem is usually the smartest financial move.
FAQ
What is the best 21 inch lawn mowers for beginners? For beginners, a battery-powered push mower is usually the best choice. Models like the Greenworks 40V or 60V are incredibly easy to start with just a button press. They require no oil mixing or complicated engine maintenance, making them very approachable for those who have never operated a lawn mower before. Their lightweight nature also makes them easy to control.
How much should I spend on 21 inch lawn mowers? For a reliable machine that will last several seasons, expect to spend between $300 and $550. This range covers high-quality gas push mowers and mid-to-high range battery units. If you have a very large or hilly yard, spending closer to $600 for a self-propelled 80V model is a worthwhile investment for the added power and reduced physical effort.
What features are most important in 21 inch lawn mowers? The most critical features are the motor/engine power, the deck material, and the grass management system (3-in-1). A steel deck ensures durability, while a brushless motor or a high-torque gas engine ensures the mower can handle tall grass. Single-lever height adjustment is also a major convenience feature that you will appreciate every time you mow.
How do I maintain my 21 inch lawn mowers? For battery mowers, maintenance is minimal; keep the deck clean of grass buildup and sharpen the blade once a year. For gas mowers, you must check the oil regularly, clean the air filter, and change the spark plug annually. Regardless of the type, always store your mower in a dry place and remove the battery during extreme winter temperatures.
Are expensive 21 inch lawn mowers worth it? Yes, if they offer features that save you time and effort. Expensive models usually include self-propelled drive systems, better battery technology, and more durable materials like aluminum. These features improve the cut quality and make the chore of mowing much less strenuous, which is often worth the extra upfront cost over the lifespan of the tool.
What brands make the best 21 inch lawn mowers? Greenworks is currently a leader in the electric mower space, offering a wide range of voltages and innovative storage solutions. PowerSmart is an excellent choice for those looking for value-driven gas and electric options. Both brands have established reputations for providing reliable equipment and accessible replacement parts for residential users.
How long do 21 inch lawn mowers typically last? A well-maintained gas mower can last 10 to 15 years. Battery-powered mowers also have long lifespans, though the batteries themselves typically need replacement every 5 to 7 years depending on usage and storage. The motors and decks are built to last a decade or more if they are not abused or left out in the elements.
Can I find good 21 inch lawn mowers on a budget? Absolutely. Gas-powered push mowers are often the most affordable entry point while still offering professional-grade cutting power. Brands like PowerSmart offer robust 21-inch models under $300 that are perfect for smaller, flat yards where a self-propelled system is not strictly necessary.
Final Verdict
After a thorough review of the top models, the Greenworks 80V Self-Propelled Mower stands out as the premier choice for most homeowners.
It combines the raw power of gas with the silence and cleanliness of electric, making it a versatile tool for any suburban yard.
For those on a tighter budget, the PowerSmart 144cc Gas Mower offers exceptional value and reliable performance without the need for expensive batteries.
If you have limited storage space, we highly recommend the Greenworks 80V model with EZ Fold handles for its ingenious vertical storage design.
Regardless of your choice, investing in a high-quality 21-inch mower will make your lawn maintenance faster and more enjoyable.
You can find our top recommendation here: https://www.amazon.com/dp/B07VRFN6RY?tag=home-essentials-guide-20&linkCode=osi&th=1&psc=1
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