Choosing the best 21 inch lawn mower is essential for maintaining a healthy and attractive lawn. There are various types, including gas-powered and electric models, and the 21 inch lawn mower deliver powerful cutting performance and maneuverability for most residential yards.
A properly fitted 21 inch lawn mower in 2026 enhances your yard work experience by offering efficient grass cutting and ease of use. Designed to match various lawn sizes and terrains, top-rated covers offer durability and reliable operation season after season.
This guide highlights the best 21 inch lawn mower to help you choose the right option for your specific lawn care needs and preferences.
10 best 21 inch lawn mower
“Before you buy, carefully consider your lawn's size and terrain. If you need a powerful and reliable option for larger areas, a self-propelled gas mower is your best bet. If ease of use and eco-friendliness are your top concerns, invest in a cordless electric model with a long-lasting battery. Always double-check the product listing for your specific engine size and cutting deck features, and confirm compatibility with any desired accessories to avoid compatibility issues.”
best 21 inch lawn mower Comparison Table
| Product | Best For | Key Strength | Who It’s For | |
|---|---|---|---|---|
| PowerSmart 21 inch lawn mower | Best For: Easy Starting | Self-Propelled Drive System | Medium-Sized Yards | Check Price |
| PowerSmart 21 inch lawn mower | Best For: Versatile Cutting | User-Friendly Push Operation | Medium Yard Owners | Check Price |
| BILT HARD 21 inch lawn mower | Best For: Thick Grass | Powerful 201cc Engine | Tough Terrain Users | Check Price |
| Greenworks 21 inch lawn mower | Best For: Zero Emissions | Variable Speed Self-Propulsion | Eco-Conscious Owners | Check Price |
| AMERISUN 21 inch lawn mower | Best For: Tough Grass | Powerful 170cc Engine | Faster Mowing | Check Price |
| BILT HARD 21 inch lawn mower | Best For: Effortless Mowing | Easy Start System | Customizable Height Adjustment | Check Price |
| SENIX 21 inch lawn mower | Best For: Consistent Power | Durable Steel Deck | Long-Lasting Performance | Check Price |
| AMERISUN 21 inch lawn mower | Best For: Various Grass Conditions | Durable Steel Deck | Resilient Construction | Check Price |
| Grasscool 21 inch lawn mower | Best For: Excellentching | Durable Steel Alloy | Troy-Bilt Upgraders | Check Price |
| WORX 21 inch lawn mower | Best For: Consistent Cutting | Dual Battery Runtime | Low Maintenance Yards | Check Price |
1. PowerSmart 21 inch lawn mower – Affordable Pick
For homeowners looking to tackle their lawns with a reliable and user-friendly machine, the PowerSmart 21" Self-Propelled Lawn Mower offers a compelling solution. Equipped with a robust 140cc Briggs & Stratton engine, this mower is designed to make yard work less of a chore, particularly for those with medium-sized yards. Its self-propelled feature takes the strain out of pushing, while the 21-inch cutting deck ensures efficient coverage, getting the job done quicker.
What truly sets this PowerSmart model apart is its blend of power, convenience, and durability at an accessible price point. It’s not just about cutting grass; it’s about providing a hassle-free mowing experience with features that cater to different lawn conditions and user preferences. From its sturdy steel deck to its versatile 3-in-1 cutting system, this mower aims to deliver a clean cut and a well-maintained lawn without breaking the bank.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 140cc Briggs & Stratton |
| Cutting Width | 21 inches |
| Drive System | Self-Propelled |
| Deck Material | Steel |
| Cutting Options | Mulch, Bag, Side Discharge |
| Height Adjustment | 6-position |
| Wheel Size | 8-inch front, 8-inch rear |
Reasons to Buy
- Reliable and powerful 140cc Briggs & Stratton engine ensures easy starting and consistent performance.
- Self-propelled drive system significantly reduces physical effort, making mowing less strenuous.
- Versatile 3-in-1 cutting system (mulch, bag, side discharge) adapts to various lawn conditions and preferences.
- Durable steel deck provides long-lasting resilience against wear and tear.
- Affordable price point offers excellent value for the features and performance provided.
Reasons to Avoid
- The self-propelled speed is not adjustable, which might be too fast or slow for some users.
- Lacks advanced features like electric start or variable speed control found on more premium models.
2. PowerSmart 21 inch lawn mower – Best Value
For homeowners looking for a reliable and straightforward way to maintain their lawns, the PowerSmart 21-Inch Gas Lawn Mower with its 144cc OHV engine offers a compelling solution. This push mower is designed for ease of use, making it an excellent choice for those who want a clean cut without the complexity of self-propelled models or electric cords. It's ideal for medium-sized yards where maneuverability and consistent performance are key.
What truly sets this PowerSmart mower apart is its blend of power, versatility, and affordability. The robust 144cc engine handles typical lawn conditions with ease, while the 3-in-1 functionality—bagging, mulching, and side discharge—allows you to adapt to your lawn's specific needs. It’s a no-nonsense machine that gets the job done efficiently, providing a great balance of features for its price point.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 144cc OHV |
| Cutting Width | 21 inches |
| Starting System | Recoil Start |
| Deck Material | Steel |
| Functionality | 3-in-1 (Bag, Mulch, Side Discharge) |
| Drive Type | Push |
| Wheel Size | 7-inch front, 8-inch rear |
| Weight | 55 lbs |
Reasons to Buy
- Powerful 144cc OHV engine handles most lawn conditions effectively.
- Versatile 3-in-1 cutting system (bag, mulch, side discharge) adapts to your needs.
- 21-inch cutting deck offers good coverage for medium-sized yards.
- User-friendly push operation with ergonomic handle for comfort.
- Durable steel deck and reliable engine for long-term use.
- Affordable price point offers excellent value for homeowners.
Reasons to Avoid
- Lacks a self-propel feature, requiring more physical effort on inclines or larger yards.
- Starting mechanism is a manual recoil pull, which may be challenging for some users.
- No electric start option for those seeking maximum convenience.
3. BILT HARD 21 inch lawn mower – Premium Choice
For homeowners looking to tackle medium to large lawns with efficiency and ease, the BILT HARD 21 Inch Self-Propelled Gas Lawn Mower presents a compelling option. This machine is designed to simplify yard work, offering robust performance thanks to its powerful 201cc 4-cycle engine and versatile 3-in-1 cutting system. Whether you prefer bagging clippings, mulching them back into the turf, or using the side discharge, this mower adapts to your needs, making lawn maintenance less of a chore and more of a satisfying task.
What truly sets this BILT HARD mower apart is its combination of user-friendly features and dependable power. The self-propelled drive system significantly reduces physical strain, allowing you to navigate inclines and larger areas without breaking a sweat. Coupled with an easy-start mechanism and an adjustable cutting height, it’s built to accommodate a wide range of users and lawn conditions, promising a clean, professional-looking cut every time.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 201cc 4-Cycle Gas Engine |
| Cutting Width | 21 Inches |
| Drive Type | Self-Propelled |
| Cutting Functions | Bagging, Mulching, Side Discharge |
| Cutting Height Adjustment | 8 Positions (1.2 – 3.5 inches) |
| Starting System | Easy Start |
| Wheel Size | 8-inch front, 11-inch rear |
| Deck Material | Steel |
Reasons to Buy
- Powerful 201cc engine easily handles thick grass and varied terrain.
- Self-propelled drive system significantly reduces physical effort.
- Versatile 3-in-1 cutting options (bagging, mulching, side discharge) adapt to your needs.
- Easy Start system ensures quick and effortless engine ignition.
- 8-position cutting height adjustment provides precise control for optimal lawn health.
Reasons to Avoid
- The steel deck, while durable, may be heavier than aluminum alternatives.
- While easy to start, gas engines require regular maintenance (oil changes, spark plug, air filter).
4. Greenworks 21 inch lawn mower – Budget Friendly
For homeowners seeking a powerful yet convenient way to maintain their lawns, the Greenworks 80V 21" Self-Propelled Cordless Lawn Mower presents a compelling option. This mower is designed to offer the performance of a gas-powered mower without the hassle of fuel, oil, and emissions. Its self-propelled feature makes tackling inclines and larger yards significantly easier, while the 21-inch cutting deck ensures efficient coverage. This model is particularly well-suited for those who appreciate the flexibility of battery-powered tools and are looking for a reliable, eco-friendly alternative for their lawn care needs.
What truly sets the Greenworks 80V 21" Self-Propelled Mower apart is its robust 80V battery system, which delivers impressive power and runtime, rivaling traditional gas engines. Coupled with a durable brushless motor and a smart self-propelled system, it provides a comfortable and effective mowing experience. The inclusion of LED headlights adds a practical touch for early morning or late evening yard work, and the compatibility with over 75 other Greenworks 80V tools means your investment can extend beyond just lawn mowing.
Key Specifications
| Feature | Details |
|---|---|
| Motor Type | Brushless |
| Cutting Width | 21 inches |
| Battery System | 80V |
| Battery Included | 4.0Ah |
| Charger | Rapid Charger |
| Drive System | Self-Propelled |
| Deck Material | Steel |
| Features | LED Headlights, Mulching/Bagging/Side Discharge |
Reasons to Buy
- Powerful performance comparable to gas mowers, with zero emissions.
- Self-propelled feature with variable speed makes mowing effortless, especially on inclines.
- 21-inch cutting deck offers efficient coverage for medium to large lawns.
- Versatile 3-in-1 cutting system (mulch, bag, side discharge).
- Part of a larger 80V battery system, offering compatibility with numerous other Greenworks tools.
Reasons to Avoid
- The included 4.0Ah battery may not be sufficient for very large lawns on a single charge.
- While budget-friendly for its class, the initial investment for the mower and battery can be higher than basic corded electric or gas models.
5. AMERISUN 21 inch lawn mower – Top Performer
If you're looking to tackle a larger lawn with efficiency and ease, the AMRISUN 21-Inch Self-Propelled Gas Lawn Mower is a fantastic option to consider. Designed for homeowners with substantial yards, this mower combines robust power with user-friendly features to make lawn maintenance less of a chore. Its self-propelled nature means less pushing effort, while the 21-inch cutting deck covers more ground with each pass, saving you valuable time.
What truly sets the AMRISUN apart is its blend of power and versatility. The reliable 170cc 4-stroke engine provides ample torque for various grass types and conditions, and the 3-in-1 cutting system offers flexibility for mulching, bagging, or side discharge. For those with medium to large properties who want a dependable and effective mowing experience without breaking the bank, this mower presents a compelling value proposition.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 170cc 4-Stroke Gas Engine |
| Cutting Width | 21 inches |
| Drive System | Self-Propelled |
| Cutting Height Adjustment | 6-Position |
| Cutting Options | Mulch, Bag, Side Discharge |
| Wheel Size | 8-inch Front / 11-inch Rear |
| Fuel Tank Capacity | 1.5 Liters |
| Weight | 75 lbs |
Reasons to Buy
- Powerful 170cc engine handles tough grass with ease.
- Self-propelled drive significantly reduces user effort.
- Versatile 3-in-1 cutting system (mulch, bag, side discharge) adapts to your needs.
- 21-inch cutting deck covers more ground for faster mowing.
- Durable construction for long-term reliability.
Reasons to Avoid
- May be heavier than some users prefer for manual maneuvering.
- Requires standard gas engine maintenance (oil changes, etc.).
6. BILT HARD 21 inch lawn mower – Recommended
If you're looking for a robust and reliable gas-powered mower to tackle medium to large lawns, the BILT HARD 21 Inch Self-Propelled Gas Lawn Mower is a strong contender. Designed for homeowners who value power and versatility, this machine boasts a powerful 201cc engine and a convenient self-propelled system, making yard work less of a chore. Its 3-in-1 functionality means you can easily switch between bagging clippings, mulching them back into the lawn, or discharging them to the side, adapting to your lawn's specific needs.
What truly sets this mower apart is its combination of user-friendly features and solid performance. The easy-start system minimizes frustration, while the 8-position height adjustment offers precise control over your cut. For those who want a clean, efficient cut without breaking the bank, the BILT HARD mower presents a compelling value proposition, offering the power of a larger engine in a manageable and effective package.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 201cc 4-Cycle OHV |
| Starting System | Easy Start |
| Drive Type | Self-Propelled |
| Cutting Width | 21 Inches |
| Functions | Bagging, Mulching, Side Discharge |
| Height Adjustment | 8 Positions |
| Wheel Size | 8-inch Front / 11-inch Rear |
| Deck Material | Steel |
Reasons to Buy
- Powerful 201cc engine handles thick grass with ease.
- Self-propelled system significantly reduces user effort.
- Versatile 3-in-1 cutting options (bag, mulch, side discharge).
- Easy Start system makes starting the engine hassle-free.
- 8-position height adjustment offers precise cutting control.
Reasons to Avoid
- As a gas mower, it requires regular maintenance and fuel.
- May be heavier than comparable electric or battery-powered models.
7. SENIX 21 inch lawn mower – Recommended
If you're looking for a reliable and straightforward gas-powered lawn mower to tackle your yard, the SENIX 144 cc Gas Lawn Mower is a solid contender. Designed for homeowners with medium-sized lawns, this 21-inch push mower offers essential features without unnecessary complexity. It's ideal for those who value ease of use and effective cutting performance for basic lawn maintenance.
This SENIX model stands out by providing a no-frills yet highly functional mowing experience. Its 144 cc 4-cycle engine delivers consistent power, while the 2-in-1 capability allows for efficient mulching or side discharge, catering to different lawn care preferences. For anyone seeking a dependable workhorse for their garden without a hefty price tag or complicated features, this mower presents a compelling value proposition.
Key Specifications
| Feature | Details |
|---|---|
| Engine | 144 cc 4-Cycle Gas Engine |
| Cutting Width | 21 inches |
| Mowing Functions | Mulching, Side Discharge |
| Starting System | Recoil Start |
| Wheel Size | 8-inch Front / 8-inch Rear |
| Cutting Height Adjustment | 6 Positions |
| Handle Type | Folding |
Reasons to Buy
- Reliable 144 cc 4-cycle engine provides consistent power.
- 2-in-1 cutting system offers versatile mulching and side discharge options.
- Easy 6-position cutting height adjustment for customized lawn care.
- Durable steel deck construction for longevity.
- Folding handle design simplifies storage and transport.
Reasons to Avoid
- Lacks self-propulsion, which may be a drawback for larger yards or sloped terrain.
- Basic feature set may not appeal to users seeking advanced functionalities like electric start or variable speed.
8. AMERISUN 21 inch lawn mower – Recommended
Tackling your lawn care tasks just got significantly easier with the Rugged Steel Deck 21" Gas Push Lawn Mower. Designed for homeowners who value efficiency and a clean cut, this mower is perfect for medium-sized yards. Its robust construction and user-friendly features make it an excellent choice for anyone looking to maintain a pristine lawn without a lot of fuss. Whether you're a seasoned gardener or just starting out, this mower offers a blend of power and convenience that's hard to beat.
What truly sets this mower apart is its combination of a powerful 144cc OHV engine and a versatile 3-in-1 cutting system, all housed within a durable steel deck. It provides the muscle needed for tougher grass while offering the flexibility to mulch, bag, or side-discharge clippings. This adaptability, coupled with its intuitive design and excellent maneuverability, makes it a standout option for achieving a professional-looking finish on your lawn with minimal effort.
Key Specifications
| Feature | Details |
|---|---|
| Cutting Width | 21 inches |
| Engine | 144cc OHV |
| Deck Material | Rugged Steel |
| Cutting Options | 3-in-1 (Mulch, Bag, Side Discharge) |
| Height Adjustment | 6-Level |
| Grass Collector Capacity | Large |
| Wheel Size | 8-inch front, 11-inch rear |
| Weight | Approximately 65 lbs |
Reasons to Buy
- Powerful 144cc OHV engine handles various grass conditions effectively.
- Versatile 3-in-1 cutting system offers mulching, bagging, and side-discharging options.
- Durable steel deck construction ensures long-lasting performance and resilience.
- Easy 6-level height adjustment for customized lawn appearance.
- Large grass collector reduces the frequency of emptying, saving time.
- Good maneuverability thanks to well-sized wheels and balanced design.
Reasons to Avoid
- This is a push mower, meaning it requires user effort to propel forward, which may be tiring for very large or hilly yards.
- Lacks self-propel functionality, which is a common feature on higher-end mowers.
9. Grasscool 21 inch lawn mower – Recommended
If you're looking to give your Troy-Bilt 21-inch walk-behind mower a new lease on life, the Grasscool TB110 Mulching Blade is a fantastic replacement option. Designed to fit a wide range of Troy-Bilt models, this blade focuses on mulching, which means it chops grass clippings into fine pieces that are then returned to your lawn, acting as a natural fertilizer. This not only saves you the hassle of bagging but also contributes to a healthier, greener yard.
This mulching blade stands out for its durable construction and its ability to effectively break down grass. For homeowners who prefer a clean, manicured look without the extra work of dealing with clippings, this blade offers a compelling value proposition. It's a straightforward upgrade that can significantly improve your mowing experience and the overall health of your lawn.
Key Specifications
| Feature | Details |
|---|---|
| Blade Type | Mulching |
| Deck Size Compatibility | 21-inch |
| Compatible Brands | Troy-Bilt |
| Replaces Part Numbers | 942-0741A, 742-0741A |
| Material | High-strength steel alloy |
| Blade Length | 21 inches |
| Center Hole Diameter | Standard (fits most Troy-Bilt spindles) |
Reasons to Buy
- Excellent mulching performance, finely chopping clippings for lawn health.
- Durable construction from high-strength steel alloy for longevity.
- Wide compatibility with many Troy-Bilt 21-inch mower models.
- Easy to install, a straightforward upgrade for most users.
- Promotes a healthier lawn by returning nutrients to the soil.
Reasons to Avoid
- Not suitable for users who prefer to collect grass clippings for composting or disposal.
- Requires occasional sharpening to maintain optimal mulching efficiency.
10. WORX 21 inch lawn mower – Recommended
If you're tired of the hassle of gas-powered mowers but still need the power and cutting width to tackle a decent-sized lawn, the WORX Nitro 21" Cordless Lawn Mower might be your perfect solution. This electric mower is designed for homeowners who want a powerful, self-propelled experience without the fumes, noise, and maintenance associated with traditional engines. It's a fantastic option for those looking to upgrade to a more convenient and eco-friendly way to keep their yard looking its best.
What truly sets the WORX Nitro apart is its blend of robust performance and smart technology. Featuring a 21-inch cutting deck, variable speed self-propulsion, and the intelligent Intellicut technology that adjusts power based on grass conditions, this mower aims to deliver a professional-level cut with minimal user effort. The inclusion of two 5.0 Ah batteries and a charger right out of the box means you're ready to go, making it a compelling value proposition for anyone seeking a high-performance cordless mowing experience.
Key Specifications
| Feature | Details |
|---|---|
| Cutting Width | 21 inches |
| Motor | Brushless |
| Drive System | Variable Speed Self-Propelled |
| Battery | 2 x 5.0 Ah Lithium-ion (20V/40V Max System) |
| Charge Time | Approximately 2 hours per battery |
| Deck Material | Steel |
| Mulching/Bagging/Side Discharge | Yes (3-in-1) |
| Weight | Approximately 60 lbs |
Reasons to Buy
- Powerful and consistent cutting performance thanks to Intellicut technology.
- Variable speed self-propulsion makes mowing effortless and customizable.
- Dual 5.0 Ah batteries provide ample runtime for most yards, with a quick-charging system.
- Low maintenance requirements compared to gas-powered mowers.
- Eco-friendly operation with zero emissions and reduced noise pollution.
- Compact storage design with folding handles.
Reasons to Avoid
- May require purchasing additional batteries for very large or heavily overgrown lawns.
- Steel deck, while durable, can be heavier than some composite alternatives.
Our Top Picks for the best 21 inch lawn mower
Here are our top 3 picks based on performance, versatility, and user satisfaction.
Wrap Up the best 21 inch lawn mower
Choosing the right product depends on your priorities—engine power, self-propulsion, or cutting versatility. For beginners, lightweight options make learning fun and safe. For enthusiasts, premium models deliver exceptional results. There's a perfect option for every budget.
Consider your purpose first: casual use, content creation, or professional work. The best 21 inch lawn mower we reviewed offer solid value and features. Investing wisely ensures a rewarding experience for years.
FAQs Regarding 21 inch lawn mower
What is the best option for beginners?
For beginners, lightweight push mowers with easy starting mechanisms are ideal. Models with a 21-inch deck offer a good balance of coverage and maneuverability.
How much power do I need in a 21 inch lawn mower?
For most residential lawns, an engine between 140cc and 170cc is sufficient. Larger yards or thicker grass may benefit from engines closer to 200cc.
Are electric 21 inch lawn mower powerful enough?
Yes, modern electric mowers, especially those with brushless motors and high voltage batteries, can provide ample power for most lawn care needs.
What does 3-in-1 functionality mean?
It means the mower can bag clippings, mulch them back into the lawn, or discharge them to the side. This offers flexibility for different lawn conditions.
How often should I perform maintenance on a gas 21 inch lawn mower?
Regular maintenance includes checking oil levels, cleaning the air filter, and replacing the spark plug annually. Blade sharpening is also recommended.
Can I use a 21 inch lawn mower on hilly terrain?
Self-propelled models are highly recommended for hilly terrain as they reduce the physical effort required to push the mower uphill.
What is the advantage of a steel deck?
A steel deck is generally more durable and resistant to damage from impacts compared to plastic decks, offering a longer lifespan for the mower.
Are there any 21 inch lawn mower models with electric start?
Yes, many gas-powered models now feature electric start buttons, making it easier to get the engine running without pulling a recoil cord.
