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Picking the right 21 lawn mower matters because a single pass can determine lawn health, mowing time, and how comfortable the job feels. A properly matched 21-inch mower balances cutting width, power, and handling so you get an even finish without extra passes or fatigue. This guide covers the top seven 21 lawn mowers shortlisted for typical home yards and small properties. We evaluate cutting quality, user controls, drive and maneuverability, and maintenance needs to help you choose the mower that fits your lawn size and routine. Read on for quick decision points and the criteria we used to select these options.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Greenworks 80V 21" Push Lawn Mower with 4.0Ah Battery and Charger |  |
| Best Quality Built to a higher standard if you want something more solid | Honda HRN-BV 21-Inch Battery Walk-Behind Self-Propelled Mower |  |
| Best Value The sweet spot between price and what you get | SENIX 21" 144cc 3-in-1 Gas Push Lawn Mower |  |
| Best Budget The cheapest option that still gets the job done reliably | NBKXDEL 21-Inch Cordless Brushless Lawn Mower with Dual 8.0Ah Batteries |  |
| Highest Rated A top-rated pick with lots of positive feedback | PowerSmart 80V 21-Inch Brushless Cordless Push Lawn Mower |  |
| Most Popular A crowd favorite that many people choose with confidence | Greenworks 60V 21" Self-Propelled Lawn Mower with Two 4.0Ah Batteries |  |
| Best Seller A high-volume bestseller chosen again and again | EGO POWER+ 21" Cordless Electric Push Lawn Mower with 6.0Ah Battery (LM2114) |  |
Greenworks 80V 21" Push Lawn Mower with 4.0Ah Battery and Charger
| Power Source | Battery Powered |
|---|---|
| Battery Average Life | 60 minutes |
| Number of Positions | 7 |
| Operation Mode | Manual |
The Greenworks 80V 21" push mower is a battery-powered walk-behind mower designed to replace small gas mowers for typical suburban yards. It uses a brushless motor and an included 80V 4.0Ah battery with a rapid charger that reaches a full charge in about 60 minutes, delivering up to roughly 60 minutes of runtime depending on grass and technique. The 21-inch steel deck and 3-in-1 cutting system let you mulch, bag, or side-discharge clippings, while a single-lever, 7-position height adjustment makes it easy to dial in cut height. Practical touches include push-button start, quieter operation than gas, and vertical storage to save space. The mower is best for homeowners with medium-size lawns who want low maintenance and the convenience of cordless operation. Be aware that heavier users with very large properties may need spare batteries for longer sessions, and the push design requires physical effort on slopes compared with self-propelled models.
Best for: Homeowners with medium-size yards who want a low-maintenance, quiet alternative to gas mowers and value easy starts and versatile clipping options.
Less Ideal for: People with large properties, steep terrain, or who prefer self-propelled or commercial-grade mowers should consider higher-capacity or powered-drive options.
- Brushless 80V motor offers strong torque with quieter operation than gas engines
- Includes 4.0Ah battery and rapid charger that can recharge in about 60 minutes
- 21-inch steel deck with 3-in-1 mulch, bag, and side-discharge options
- Single-lever 7-position height adjustment for quick changes
- Push-button start and vertical storage reduce setup time and footprint
- Push model without self-propelled drive can be tiring on hilly or very large lawns
- Single 4.0Ah battery may be insufficient for extended mowing sessions without a spare
Verdict: A convenient, low-noise cordless push mower that delivers gas-free performance and versatile cutting for typical suburban lawns.
Honda HRN-BV 21-Inch Battery Walk-Behind Self-Propelled Mower
| Power Source | Battery Powered |
|---|---|
| Cutting width | 21 inches |
| Number of Positions | 7 |
| Operation Mode | Automatic |
The Honda HRN-BV is a performance-focused 21-inch battery walk-behind mower that delivers gas-like torque using a high-efficiency motor and a twin blade MicroCut system for fine clippings. It is typically used for small to medium yards where users want a clean finish without fumes or engine maintenance. Notable features include a variable-speed Smart Drive self-propel system for comfortable forward control, a Clip Director to switch between mulching, bagging, and discharging, and a 1.9-bushel easy-off grass bag for collection. The included 8Ah lithium-ion battery runs about 30 minutes under typical conditions and is user-replaceable with larger-capacity options for longer runtimes. Practical benefits are strong cutting performance in thick or tall grass, easy height adjustment across seven positions, and nationwide parts and service support backed by a three-year residential warranty. Important limitations are the mower's weight and single included battery which may require a second or higher-capacity battery for larger yards, and run time will vary with grass conditions and cutting height.
Best for: Buyers who prioritize cutting performance and a professional-quality finish in small to medium lawns and want a battery mower that handles thick grass without the upkeep of gas engines.
Less Ideal for: Those with large properties who need long uninterrupted runtimes or users who prefer a lighter, ultra-compact mower for tight yards.
- High-torque Honda motor designed to maintain RPMs for consistent cut quality in thick grass
- Twin blade MicroCut system produces finer clippings for improved mulching and bagging
- Variable-speed Smart Drive self-propel makes forward control ergonomic and adjustable
- Clip Director lets you switch quickly between mulching, bagging, and side discharge
- Nationwide service network and a three-year residential warranty for long-term support
- Included 8Ah battery provides around 30 minutes runtime which may be short for larger yards
- Heavier unit can be more challenging to maneuver when battery is low or on slopes
Verdict: Choose this Honda mower if you want gas-like cutting power and a finely mulched finish from a battery-powered self-propelled machine.
SENIX 21" 144cc 3-in-1 Gas Push Lawn Mower
| Power Source | Gas Powered |
|---|---|
| Engine | 144 cc 4-stroke OHV |
| Cutting Width | 21 inches |
| Number of Positions | 6 |
| Includes | 1.7 bushel grass bag, mulch plug, side discharge |
The SENIX 21" 144cc 3-in-1 gas push mower is built for homeowners who want a straightforward, ready-to-use machine for regular lawn maintenance. It arrives with engine oil and the main attachments so you can start mowing quickly; the 4-stroke OHV engine provides steady power for cutting thicker turf while maintaining reasonable fuel use. Switching between rear bagging, mulching, and side discharge is practical for seasonal needs, and the included 1.7-bushel grass bag reduces how often you stop to empty clippings. Dual-lever height adjustment with six positions makes it easy to tune the finish between 1.25 and 3.75 inches, and the larger rear wheels improve traction and handling on uneven yards. The steel deck and vortex tunnel help limit grass buildup, but as a manual push mower it requires physical effort on slopes or very large properties. Assembly and routine maintenance like oil and blade care are necessary to keep the engine running smoothly. For basic to moderately challenging lawns this mower offers a solid mix of power, versatility, and ready-to-run convenience.
Best for: Homeowners who want a practical, ready-to-run gas mower that balances power and versatility for routine lawn care on small to medium yards.
Less Ideal for: People with very large properties, steep slopes, or those who prefer zero-maintenance electric or self-propelled options should look elsewhere.
- Comes pre-filled with engine oil for immediate startup
- Versatile 3-in-1 design supports bagging, mulching, and side discharge
- Six-position dual-lever height adjustment for precise cutting from 1.25 to 3.75 inches
- Large 1.7-bushel grass catcher reduces emptying frequency
- Vortex tunnel and steel deck reduce grass buildup and improve durability
- Manual push design can be tiring on large or hilly lawns
- Some assembly and regular engine maintenance required
Verdict: A ready-to-run, no-frills gas push mower that gives practical 3-in-1 versatility and reliable power for everyday yard work.
NBKXDEL 21-Inch Cordless Brushless Lawn Mower with Dual 8.0Ah Batteries
| Power Source | Battery Powered |
|---|---|
| Cutting width | 21 inches |
| Maximum Adjustable Cutting Height | 4 inches |
| Minimum Adjustable Cutting Height | 1.2 inches |
| Number of Positions | 8 |
This NBKXDEL 21-inch cordless mower is a straightforward battery-powered push mower intended for routine lawn maintenance on small to medium yards. It uses two 8.0Ah batteries and a 3200 RPM brushless motor to deliver up to about 45 minutes of runtime while offering lower noise and reduced maintenance compared with brushed motors. The 8-position single-lever height adjustment (1.2 to 4 inches) and three working modes—bagging, mulching, and side discharge—make it flexible for different grass lengths and clippings preferences, and the included 15.9-gallon collection bag is easy to remove and empty. A 100W fast charger shortens downtime between uses, and two spare blades mean less immediate maintenance expense. Expect the mower to handle typical suburban lawns efficiently, but keep in mind its manual push operation and the stated runtime mean larger properties or very thick turf may require recharging or a slower pace. Build materials are a mix of metal and plastic, so treat it as a value-oriented tool rather than a heavy-duty commercial machine.
Best for: Buyers who need an affordable, cordless mower for routine care of small to medium suburban lawns and who prioritize quiet, low-maintenance operation over commercial durability.
Less Ideal for: Owners of large properties, heavy clay or overgrown turf, or users who need self-propelled power and long continuous runtime should consider larger gas or professional-grade electric mowers.
- Dual 8.0Ah batteries provide around 45 minutes runtime for typical small to medium lawns
- 3200 RPM brushless motor offers quieter operation and lower maintenance than brushed motors
- 8-position single-lever height adjustment for quick changes between 1.2 and 4 inches
- Three mowing modes (bagging, mulching, side discharge) and large 15.9-gallon bag for flexible cleanup
- Manual push design can be tiring on larger or uneven lawns
- Mixed metal and plastic construction is appropriate for home use but not heavy commercial workload
Verdict: A budget-friendly cordless mower that gives quiet, low-maintenance performance and flexible mowing modes for small to medium yards.
PowerSmart 80V 21-Inch Brushless Cordless Push Lawn Mower
| Power Source | Battery Powered |
|---|---|
| Cutting width | 21 inches |
| Battery capacity | 6.0Ah |
| Maximum Adjustable Cutting Height | 3.9 inches |
| Number of Positions | 6 |
This PowerSmart mower pairs an 80V brushless motor with a 21-inch steel deck and a 6.0Ah battery to deliver cordless mowing for small to mid-size yards. It is started with an easy push-button and runs on a 432Wh battery that the manufacturer rates for up to about 40 minutes of runtime, which is typically enough to cover roughly a half acre per charge under normal conditions. The brushless motor offers quieter operation and better efficiency than brushed designs, while the steel deck and six-position height adjustment let you handle varied grass lengths. Collapsible handles make storage easier and the included charger reaches a full charge in about 90 minutes, so turnaround between uses is reasonably quick. Important limitations are that actual runtime will vary with grass density and cutting conditions, and this model is a push mower so it requires physical effort on uneven or hilly terrain. Expect basic, no-frills controls and standard maintenance for a battery-powered walk-behind mower.
Best for: Buyers who prioritize dependable, low-maintenance cordless mowing for small to mid-size yards and want a straightforward machine built for consistent performance.
Less Ideal for: Not well suited for users with large acreage, steep slopes, or those who need a self-propelled mower for easier maneuvering over long runs.
- Brushless 80V motor for stronger, quieter operation than brushed motors
- Includes 6.0Ah battery and charger for cordless use out of the box
- 21-inch steel deck covers ground efficiently with fewer passes
- Six-position height adjustment to handle different grass lengths
- Collapsible handles for more compact storage
- Runtime up to 40 minutes is dependent on grass conditions and may be less on heavy or tall turf
- Push-only design can be tiring on slopes or larger properties
Verdict: A reliable, no-frills battery mower that delivers quiet, efficient cordless performance for typical small to mid-size lawns.
Greenworks 60V 21" Self-Propelled Lawn Mower with Two 4.0Ah Batteries
| Power Source | dc |
|---|---|
| Number of Positions | 7 |
| Maximum Adjustable Cutting Height | 4 inches |
| Minimum Adjustable Cutting Height | 1 inches |
| Material Type | Plastic |
This Greenworks 60V self-propelled mower brings gas-like cutting power in a battery platform that runs quietly and starts instantly. It is built around a brushless motor, a 21-inch steel deck and two 4.0Ah batteries that auto-switchover to provide long runtimes—enough to mow about 3/4 acre in typical conditions. Use it like a standard walk-behind mower: set one of seven height positions, choose bagging, mulching, side discharge or turbo leaf pickup and guide the rear-wheel drive on slopes while the drive assists your pace. Notable features include LED headlights for low-light work, EZ-fold handles for compact storage, and IPX4-rated protection for weather resistance. Practical benefits are low noise, no gasoline or tune-ups, and compatibility with Greenworks 60V batteries across many tools. The main trade-offs are the upfront weight and the dependency on battery runtime in very tall or wet grass where a single charge may not finish the largest yards, plus accessory purchases are required for striping or replacement batteries.
Best for: Homeowners who want a quiet, low-maintenance mower with near-gas performance and value the convenience of a shared 60V battery ecosystem for multiple yard tools.
Less Ideal for: People with very large properties who need uninterrupted multi-hour runtime or those who prefer the simplicity of a small, lightweight push mower for tight, flat yards.
- Brushless 60V motor with dual 4.0Ah batteries provides long runtime and gas-like cutting power
- Self-propelled rear-wheel drive with adjustable pace makes slopes and thick grass easier to manage
- 7-position height adjustment plus 4-in-1 cut options (mulch, bag, side discharge, turbo pickup) for versatility
- LED headlight and EZ-fold handles improve low-light operation and compact storage
- Batteries are compatible with 75+ Greenworks 60V tools for ecosystem convenience
- Relatively heavy compared with smaller cordless mowers, which may affect maneuverability for some users
- Runtime can be limiting on very large, wet, or overgrown lawns without additional or higher-capacity batteries
- Some desirable accessories such as striping kits or replacement batteries are sold separately
Verdict: Choose this mower if you want near-gas performance and quiet, maintenance-free operation with the flexibility of a shared 60V battery system.
EGO POWER+ 21" Cordless Electric Push Lawn Mower with 6.0Ah Battery (LM2114)
| Power Source | Battery Powered |
|---|---|
| Cutting width | 21 inches |
| Battery Average Life | 55 minutes |
| Number of Positions | 7 |
| Maximum Adjustable Cutting Height | 4 inches |
The EGO POWER+ LM2114 is a 21-inch cordless push mower intended for homeowners who want a quiet, low-maintenance alternative to gas mowers. It runs on a 56V 6.0Ah battery that the manufacturer rates for up to 55 minutes per charge, and it supports mulching, side discharge, or bagging with the included two-bushel collection bag. The mower has a brushless motor for smoother operation and longer life and seven cutting height positions that adjust between about 1.25 and 4 inches to suit different lawn lengths. Bright LED headlights help with early morning or late evening mowing. Practical benefits include no gasoline, less vibration and routine maintenance, and compatibility with other EGO 56V batteries and tools. Important limitations are that it is a push model rather than self-propelled, which can be more tiring on slopes or larger yards, and the stated runtime may be reduced on thick or tall grass. Buyers should also plan charging between jobs if runtime is inadequate for their lot size.
Best for: Homeowners who prioritize low maintenance, quiet operation, and reliable battery performance for routine lawn care on small to medium yards.
Less Ideal for: People with large lots, steep or uneven terrain, or those who prefer a self-propelled or gas-powered mower for heavy-duty cutting tasks.
- Cordless battery power eliminates gasoline and reduces maintenance
- Brushless motor for lower vibration and increased reliability
- Up to 55 minutes runtime with included 6.0Ah battery for typical residential use
- Seven cutting height positions for flexible lawn appearance
- Includes two-bushel bag plus options for mulching and side discharge
- Push-only design can be tiring on hills or larger properties
- Runtime will vary and may be shorter when cutting thick, wet, or tall grass
Verdict: Choose the EGO LM2114 if you want a low-maintenance, battery-powered 21-inch mower that delivers reliable runtime and quieter operation for typical residential lawns.
Choosing the Right 21 Lawn Mower: Key Factors to Consider
Cutting Deck Design and Blade Quality
Deck shape and material influence how grass flows under the mower and how evenly it is cut. A well-shaped deck reduces clumping and improves mulching, producing a neater finish across different grass heights.
Blade type and sharpness retention matter because they determine how often you need to sharpen or replace blades. Thicker blades resist bending when striking small debris and hold an edge longer, which keeps cutting consistent over time. Deck sealing and discharge options also affect how clippings are handled and whether you need to bag or mulch for seasonal cleanup.
Engine Power and Torque
Engine displacement and torque affect how well the mower handles denser turf and slightly uneven terrain. A 21-inch deck paired with modest power will struggle in tall, wet grass, forcing you to slow down or take multiple passes.
Consider the type of grass and how often you mow. If you let grass grow longer between cuts or have thick, established lawns, a stronger engine with steady torque will maintain speed and cutting quality without bogging down.
Maneuverability and Steering
A mower you can steer easily reduces fatigue and speeds up work, especially around beds, trees, and tight corners. Wheel size, front-wheel caster design, and handle ergonomics all change how the machine responds to turns and obstacle navigation.
Look for usable handle height and controls that let you change direction without adjusting your grip. If your yard has slopes or narrow passages, test how quickly the mower responds to small steering inputs and whether the wheels track reliably on inclines.
Starting System and User Controls
Easy starting and intuitive controls make routine mowing less frustrating. Pull-start systems should engage smoothly without excessive recoil, while electric start options add convenience for those who prefer a push-button or key start.
Throttle, choke, and drive engagement should be reachable without changing stance. Clearly marked height adjustments and a quick-release handle simplify setup and storage. Consider how accessible the gas cap and oil dipstick are for simple pre-ride checks.
Maintenance Access and Serviceability
Quick access to the blade, air filter, and spark plug reduces downtime and keeps performance consistent. A mower that allows deck-tilting or has easy-to-remove panels makes blade sharpening, belt inspection, and underside cleaning much simpler.
Think about winter storage and seasonal tasks; models that ship with clear service points and common fasteners make DIY upkeep feasible. Also consider parts availability for common wear items like belts and wheels when evaluating long-term ownership.
Best Uses for a 21-Inch Mower
A 21-inch mower is typically ideal for small to medium home lawns where getting a precise, even cut matters more than covering acres quickly. The deck width balances pass efficiency with maneuverability, making these mowers well suited to yards with lawns, garden beds, and paved features.
If your property includes narrow gateways, flowerbeds, or ornamental plantings close to the lawn edge, a 21-inch mower lets you work close to borders without the bulk of larger machines. It is also a practical size for homeowners who store their mower in a small shed or garage.
- Good for yards roughly a quarter acre to half an acre
- Fits through most standard garden gates
- Better control around landscaping details than wider decks
Gas Vs Battery Vs Electric Options
Power source affects starting, run time, weight, and maintenance. Gas models usually give longer continuous runtime and stronger torque for thicker grass, while battery models offer quieter operation and simpler maintenance with no oil or spark plugs to service.
For a 21-inch platform, cordless battery mowers have become capable enough for many home lawns, but confirm battery capacity and swap options if you have larger areas. Corded electric mowers are lightweight and low-maintenance but limited by cord length and outlet access, so they suit small, simple lawns.
- Gas: strong run time and torque, more maintenance
- Battery: quieter, simpler upkeep, check battery capacity
- Corded electric: light weight, limited reach
Storage, Transport, and Shed Space Considerations
A 21-inch mower is easier to store than wider commercial units, but you should still measure your storage space and entry points. Folding or quick-release handles make vertical storage feasible in tight sheds.
Consider weight if you will lift the mower in and out of a vehicle or onto a trailer. Some models have detachable grass bags that reduce bulk for storage, while others allow the handle to fold down to save a few inches.
- Measure gate and shed clearances before choosing a mower
- Look for foldable handles for space savings
- Check whether the grass bag detaches for compact storage
Safety Features and Operator Comfort
Look for solid dead-man controls and clear labels on safety switches to reduce the risk of accidental starts. Operator comfort matters for longer mowing sessions: padded handles, vibration-damping mounts, and ergonomic layouts reduce strain.
Mulch plugs, discharge chutes, and bagging options should be easy to operate without changing tools. Also consider visibility of height adjustments and fuel indicators so you can make quick on-the-fly adjustments without stopping for long.
- Padded or adjustable handles reduce wrist and back strain
- Easy-to-reach engine cut-off and drive levers improve safety
- Clear height indicators simplify consistent cutting
How We Chose the Best 21 Lawn Mower
We focused on what matters most to home gardeners and small-property owners using a 21 lawn mower. Our evaluation prioritized cutting quality and deck design because these determine how even and healthy the turf looks after mowing. Maneuverability and steering response were assessed since a 21-inch mower is often used around beds, obstacles, and varied terrain. We also measured ease of starting and throttle control as practical indicators of daily usability, and considered maintenance access for blade changes, deck cleaning, and routine checks. Durability and materials were a gate for inclusion; products with fragile deck construction or poor fastener access were excluded. Noise and vibration levels were considered where data was available, and we favored mowers that balance power with reduced operator fatigue. Exclusions: we filtered out specialized commercial zero-turn machines and mowers with nonstandard deck widths. We also excluded models primarily designed for large acreages; this list stays focused on 21-inch machines suitable for home lawns, small yards, and gardeners prioritizing control and finish.
FAQ
How often should I sharpen blades on a 21-inch mower?
Usually every 20 to 25 hours of use for average lawns, but high-impact or sandy conditions require more frequent sharpening. Inspect the edge for nicks after striking hidden debris and resharpen when the cut looks ragged.
Can a 21-inch mower handle tall or wet grass?
It depends on engine torque and blade design. Many 21-inch mowers can handle occasional tall growth but may need slower passes or mulching to avoid clogging. Wet grass often clumps, so wait for dryer conditions when possible.
Is a battery-powered 21-inch mower powerful enough for my yard?
Battery mowers are adequate for many small to medium lawns, especially with modern lithium packs. Check run time and whether a spare battery or quick swap is needed for continuous mowing.
What wheel size is best for uneven lawns?
Larger rear wheels, typically 8 inches or more, help traverse ruts and small bumps and improve tracking on slopes. Front-wheel caster design also affects turning and obstacle negotiation.
How do I know when to bag, mulch, or side-discharge clippings?
Bagging is best for dense clippings or when collecting for compost. Mulching returns nutrients and is practical for regular mowing. Side discharge can be used when grass is tall or wet to avoid clogs, then follow up with raking if needed.
Final Verdict
For most home lawns, prioritize cutting quality and maneuverability when choosing a 21 lawn mower. Decide whether you need extra engine torque for thick or infrequently mowed grass, or if a battery option suits your noise and maintenance preferences. Balance ease of maintenance and storage with the handling features that match your yard layout. Keep tradeoffs in mind: a more powerful gas unit may handle heavy grass better but requires more upkeep, while battery and electric options reduce maintenance and noise at the cost of runtime. Focus on deck design, blade access, and steering responsiveness to choose confidently for your lawn and routine.
