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Finding the best 21-Inch lawn mowers requires comparing hard data rather than marketing claims. We evaluated 15 models strictly by their published specifications. The Greenworks 40V 21-Inch Self-Propelled Mower ranks first because its 40V voltage and 5.0 Ah battery provide reliable traction for slopes and low-light visibility. This list helps you decide which cutting width, drive type, and power source fit your yard's specific demands. You can compare features like brushless motors, self-propelled systems, and battery capacities to find the right tool for your maintenance routine.
Choose drive type and power source
Select self-propelled models for slopes or large lawns. Choose push models for small, flat yards under half an acre. Match voltage to your needs. Higher voltage like 80V offers more power but often requires heavier batteries. Gas engines provide consistent torque for thick grass, while cordless options reduce maintenance. Check battery capacity to ensure runtime matches your yard size.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Greenworks 40V 21-Inch Self-Propelled Mower Best overall | slopes and low-light mowing | |
| 2 | Greenworks 60V 21-Inch Self-Propelled Mower Best 60v | Medium yards needing self-propelled ease | |
| 3 | EGO Power+ 21-Inch Cordless Self-Propelled Lawn Mower Best premium | medium lawns needing quick charging and variable speed | |
| 4 | EGO Power+ 21-Inch 56V Cordless Mower Also great | medium lawns needing LED visibility | |
| 5 | Worx 21-Inch 40V Cordless Push Lawn Mower Best 1/2 acre | small flat lawns under 1/2 acre | |
| 6 | EGO Power+ 21-Inch Cordless Self-Propelled Lawn Mower Also great | Small to medium lawns needing high torque | |
| 7 | SENIX 21-Inch 170cc Self-Propelled Gas Mower Best budget | Flat yards up to 1/3 acre | |
| 8 | Greenworks 80V 21-Inch Cordless Push Mower Also great | small flat lawns needing quiet operation | |
| 9 | BILT HARD 21-Inch 201cc Self-Propelled Gas Mower Also great | varied lawn heights and grass disposal | |
| 10 | EGO Power+ 21-Inch Self-Propelled Cordless Mower Best 56v | Medium to large lawns needing long runtime | |
| 11 | Greenworks 48V 21" Self-Propelled Mower with 12" Trimmer Best leaf blower | Users wanting a mower, trimmer, and blower combo | |
| 12 | Greenworks 80V 21-Inch Cordless Push Mower Best 2.0 ah | small lawns under half an acre | |
| 13 | Honda 21-Inch Cordless Self-Propelled Lawn Mower Also great | Small yards needing Honda service support | |
| 14 | PowerSmart 21-Inch 170cc Self-Propelled Gas Mower Best 4-stroke | slopes and uneven terrain | |
| 15 | Greenworks 48V 21-Inch Self-Propelled Mower Also great | Medium lawns needing quiet operation |
The best fit for you
- You need variable speed traction on slopes – Greenworks 40V 21-Inch Self-Propelled Mower – It offers variable speed self-propelled drive and LED lights for low-light visibility.
- You want quiet operation for medium yards – Greenworks 60V 21-Inch Self-Propelled Mower – The 60V brushless motor provides quiet performance and self-propelled ease for medium lawns.
- You prefer small flat lawns under half acre – Worx 21-Inch 40V Cordless Push Lawn Mower – This 55.6-pound push mower fits small flat yards and offers mulching efficiency.
Is a 21-Inch Cutting Width Worth It?
A 21-inch deck covers more ground per pass than narrower models. This reduces the number of passes you need for medium-sized lawns. Most listed mowers fit this width. Some models are self-propelled, which helps when pushing a wider deck across slopes. Others are push models, suitable for flat yards under half an acre. The 21-inch size balances coverage and maneuverability for typical residential spaces.
Worth it if
- You have a medium lawn where reducing pass count matters.
- You need self-propelled traction to handle the wider deck on slopes.
Skip it if
- You have a very small yard under 1/4 acre where a narrower deck is easier to store.
- You only mow flat, small areas and prefer lighter, push-only units.
Greenworks 40V 21-Inch Self-Propelled Mower
Best for: slopes and low-light mowing
- Cutting Width
- 21-Inch
- Drive Type
- self-propelled
- Voltage
- 40 V
- Battery Capacity
- 5.0 Ah
- Mowing Functions
- 4-in-1
- Motor Type
- brushless
This Greenworks mower features a 40V brushless motor and a 5.0 Ah battery. It offers self-propelled rear-wheel drive with variable speed control. The 21-inch steel deck supports four mowing functions. An LED headlight allows for early morning or late evening use. You will appreciate the 73.9-pound weight and 41-inch height for maneuverability on slopes.
- Brushless motor for quieter operation
- Variable speed self-propelled drive
- 4-in-1 mowing versatility
- LED headlight for low light
- 40V system has lower voltage than 60V or 80V competitors
- 73.9 pounds is heavier than many push models
- You need variable speed control for slopes
- You want to mow at dawn or dusk
- You prefer a 4-in-1 discharge system
- You require 60V or 80V power
- You prefer a lightweight push mower
- You need a 56V or 80V battery platform
Verdict: Greenworks 40V 21in Self-Propelled Mower suits users who need variable speed traction on slopes and low-light visibility. It fits those who prioritize a 4-in-1 system over maximum voltage power.
Greenworks 60V 21-Inch Self-Propelled Mower
Best for: Medium yards needing self-propelled ease
- Cutting Width
- 21-Inch
- Drive Type
- self-propelled
- Voltage
- 60V
- Battery Capacity
- 2 x 4.0Ah
- Mowing Functions
- 4-in-1 (mulch, bag, discharge)
- Motor Type
- brushless
This Greenworks mower uses a 60V brushless motor and two 4.0Ah batteries to handle yards up to 3/4 acre. It features self-propelled rear-wheel drive for easy slope navigation. The 21-inch deck offers four mowing functions. It includes an LED headlight for low-light work. The 65-pound build provides stability. This kit suits users needing gas-like power without the noise or emissions of gas engines.
- 60V brushless motor delivers high torque
- Two 4.0Ah batteries support 3/4 acre runtime
- Self-propelled rear-wheel drive aids slope control
- LED headlight enables dawn-to-dusk mowing
- 4-in-1 versatility for mulch, bag, or discharge
- 65-pound weight is heavier than many push models
- 4.0Ah battery capacity is lower than 5.0Ah or 80V options on the list
- 60V voltage is lower than the 80V competitors available
- You need a self-propelled mower for slopes
- You want a quiet, emission-free alternative to gas
- You have a yard up to 3/4 acre
- You require an 80V system for maximum runtime
- You prefer a lightweight push mower under 60 pounds
- You need a 25-inch cutting width
Verdict: Greenworks 60V 21-Inch Self-Propelled Mower fits homeowners with medium to large yards who value self-propelled ease and quiet operation. It offers a solid balance of power and versatility for regular maintenance tasks.
EGO Power+ 21-Inch Cordless Self-Propelled Lawn Mower
Best for: medium lawns needing quick charging and variable speed
- Cutting Width
- 21-Inch
- Drive Type
- Self-propelled
- Voltage
- 56V
- Battery Capacity
- 7.5Ah
- Run Time
- Up to 60 minutes
- Motor Type
- Brushless
This EGO Power+ mower features a 21-inch cutting width and 56V brushless motor. It delivers up to 7.0 ft-lbs of cutting torque. The self-propelled system offers variable speed control. You get up to 60 minutes of runtime with the 7.5Ah battery. The unit charges in 60 minutes. It suits users who want gas-like power with quiet electric operation.
- 56V brushless motor delivers high torque
- Up to 60 minutes runtime on 7.5Ah battery
- Fast charging in 60 minutes
- Variable self-propelled speed from 0.9 to 3.1 mph
- Eight cutting height positions from 1 to 4 inches
- Heavier at 55.3 pounds compared to lighter push models
- Single 7.5Ah battery limits total session time
- Self-propelled drive requires palm pressure to engage
- You need quiet operation without gas fumes
- You want fast battery charging between mowing sessions
- You prefer variable speed self-propulsion for uneven terrain
- You prefer a lightweight push mower for small yards
- You want extended runtime beyond 60 minutes per charge
- You need a model with a higher voltage system
Verdict: EGO Power+ 21-Inch Self-Propelled Mower provides robust 56V performance for medium lawns. It fits buyers who value quick charging and precise speed control over raw runtime duration.
EGO Power+ 21-Inch 56V Cordless Mower
Best for: medium lawns needing LED visibility
- Cutting Width
- 21-Inch
- Voltage
- 56V
- Battery Capacity
- 6.0Ah
- Run Time
- up to 55 minutes
- Motor Type
- brushless
- Power Type
- Cordless
This 21-inch self-propelled mower uses a 56V 6.0Ah battery to deliver up to 55 minutes of runtime. It features a high-efficiency brushless motor and seven cutting height positions ranging from 1.25 to 4 inches. The unit weighs 82 pounds and includes LED headlights. It suits homeowners who want gas-like power with quiet electric operation and fast 80-minute charging.
- 56V 6.0Ah battery provides up to 55 minutes of runtime
- High-efficiency brushless motor ensures low vibration and reliability
- Seven cutting height positions from 1.25 to 4 inches
- Includes bright LED headlights for visibility
- Charges in 80 minutes with the included charger
- Weighs 82 pounds, which is heavier than many competitors
- 55-minute runtime is lower than some higher-capacity options
- Limited to seven cutting height positions
- You want a self-propelled mower with strong torque
- You need LED lights for dawn or dusk mowing
- You prefer a brushless motor for reliability
- You need more than 55 minutes of continuous runtime
- You prefer a lighter push mower under 80 pounds
- You want more than seven cutting height adjustments
Verdict: EGO 21-Inch Cordless Mower 56V fits users who value brushless motor reliability and LED visibility. It is a solid choice for medium-sized lawns where 55 minutes of runtime is sufficient.
Worx 21-Inch 40V Cordless Push Lawn Mower
Best for: small flat lawns under 1/2 acre
- Cutting Width
- 21-Inch
- Drive Type
- Push
- Voltage
- 40V
- Battery Capacity
- 5.0Ah
- Mowing Functions
- 3-in-1
- Motor Type
- Brushless
The Worx WG752 is a 21-inch push mower designed for lawns up to 1/2 acre. It uses two 20V 5.0Ah batteries to create a 40V system with a brushless motor. The deck features AERODECK technology to reduce clogs. You get seven height settings from 1.5 to 4 inches. It handles mulching, bagging, and side discharge. The handle collapses for vertical storage.
- Brushless motor delivers 40% more power than first-gen models
- IntelliCut sensors adjust speed to conserve battery in thin grass
- Seven-position height lever adjusts from 1.5 to 4 inches
- AERODECK vented design minimizes clumping and clogs
- Push drive requires physical effort compared to self-propelled competitors
- 55.6-pound weight is heavier than many lighter cordless options
- Single lever height adjustment is less precise than individual wheel controls
- You have a flat lawn under 1/2 acre
- You already own WORX PowerShare batteries
- You prefer mulching or bagging over side discharge
- You need self-propelled drive for hills
- Your lawn exceeds 1/2 acre
- You want a single 40V battery system
Verdict: The Worx WG752 21-Inch 40V Cordless Mower fits small, flat yards where you want mulching efficiency. It suits users who already own WORX batteries and do not mind pushing the 55.6-pound unit.
EGO Power+ 21-Inch Cordless Self-Propelled Lawn Mower
Best for: Small to medium lawns needing high torque
- Cutting Width
- 21-Inch
- Drive Type
- self-propelled
- Voltage
- 56V
- Battery Capacity
- 6.0Ah
- Run Time
- up to 50 minutes
- Mowing Functions
- 3-in-1 (mulch, bag, side discharge)
This 21-inch cordless mower delivers 6.0 ft-lbs of cutting torque and up to 50 minutes of run time on a 6.0Ah battery. It features a brushless motor and seven height adjustments from 1.25 to 4 inches. The self-propelled drive engages with either hand. It suits users seeking gas-like power in a quiet, low-vibration package for moderate lawn sizes.
- 6.0 ft-lbs cutting torque exceeds many gas models
- Up to 50 minutes run time on 6.0Ah battery
- Brushless motor for low vibration and durability
- 7-position height adjustment from 1.25 to 4 inches
- Heavier at 50.9 pounds compared to many competitors
- 50-minute runtime is shorter than higher-capacity battery options
- You want gas-like torque without the noise
- You prefer a single-hand self-propel engagement
- You need precise height adjustments for varied terrain
- You need more than 50 minutes of continuous mowing
- You prefer a lighter push mower under 45 pounds
- You want a battery system compatible with other tools
Verdict: EGO 21-Inch Self-Propelled Mower fits users who prioritize torque and quiet operation over maximum runtime or lightweight handling. It is a solid choice for small to medium yards where 50 minutes is sufficient.
SENIX 21-Inch 170cc Self-Propelled Gas Mower
Best for: Flat yards up to 1/3 acre
- Cutting Width
- 21-Inch
- Drive Type
- Self-propelled, FWD
- Mowing Functions
- 3-in-1 (mulch, bag, side discharge)
- Motor Type
- 170 cc 4-cycle OHV gas
- Height Adjustments
- 6 positions, 1.25-3.75 in
- Engine Displacement
- 170cc
The SENIX 21-Inch 170cc Gas Mower offers self-propelled FWD drive and a 170 cc 4-cycle OHV engine. It features a 21-inch steel deck with 6 height positions from 1.25 to 3.75 inches. The 3-in-1 system includes mulching, side discharge, and bagging with a 1.7-bushel bag. Weighing 61.7 pounds, it suits flat yards up to 1/3 acre.
- 170 cc 4-cycle OHV gas engine provides reliable power
- Self-propelled FWD drive reduces effort on flat terrain
- 6-position height adjustment ranges from 1.25 to 3.75 inches
- 3-in-1 cutting system supports mulching, bagging, and side discharge
- 61.7-pound weight is heavier than many competitors in this list
- 1.7-bushel bagger capacity is smaller than larger bag options
- 170 cc engine displacement is lower than 201cc models
- You need a self-propelled mower for flat yards up to 1/3 acre
- You prefer gas power for consistent runtime without battery swaps
- You want a steel deck for durability on uneven surfaces
- You have a yard larger than 1/3 acre
- You need a battery-powered mower for zero emissions
- You require a high-capacity bagger for frequent debris removal
Verdict: SENIX 21-Inch 170cc Gas Mower fits homeowners with flat, small yards who prefer gas power. It delivers solid performance for 1/3-acre maintenance with a durable steel deck.
Greenworks 80V 21-Inch Cordless Push Mower
Best for: small flat lawns needing quiet operation
- Cutting Width
- 21-Inch
- Drive Type
- Push
- Voltage
- 80V
- Battery Capacity
- 4.0 Ah
- Run Time
- Up to 60 minutes
- Mowing Functions
- 3-In-1 (mulch, rear bag, side discharge)
This Greenworks mower features a 21-inch cutting deck and an 80V brushless motor. It runs for up to 60 minutes on a 4.0 Ah battery. The unit is a push model with seven height adjustments. It offers three mowing functions: mulching, bagging, and side discharge. You should choose this if you need a quiet, emission-free machine for smaller lawns.
- 80V brushless motor provides high torque and quiet operation
- Up to 60 minutes of run time with 4.0 Ah battery
- 7-position single-lever height adjustment
- 3-in-1 mulch, rear bag, and side discharge capabilities
- Push drive type requires more physical effort than self-propelled models
- 74.1-pound weight is heavier than many competitors
- 4.0 Ah battery capacity is lower than 5.0 Ah or dual-battery options
- You want a quiet, emission-free mower for small to medium yards
- You prefer manual pushing over self-propelled drive systems
- You need versatile discharge options like mulching or bagging
- You need self-propelled drive for steep hills or large areas
- You require extended run time beyond 60 minutes
- You want a lighter machine for easy storage or transport
Verdict: Greenworks 80V 21-Inch Push Mower suits users who prioritize quiet operation and zero emissions over self-propelled convenience. It is a solid choice for flat, smaller lawns where manual pushing is manageable.
BILT HARD 21-Inch 201cc Self-Propelled Gas Mower
Best for: varied lawn heights and grass disposal
- Cutting Width
- 21-Inch
- Drive Type
- Self-Propelled
- Mowing Functions
- 3-in-1
- Motor Type
- 201cc 4-cycle OHV
- Height Adjustments
- 8-position (1.2" to 3.75")
- Power Type
- Gas
This BILT HARD mower features a 21-inch cutting width and a 201cc 4-cycle OHV engine. It delivers 9.0 ft·lb of torque for consistent performance. The self-propelled drive reduces pushing effort, while the 8-position height adjustment lets you set the cut between 1.2 inches and 3.75 inches. It handles mulching, bagging, and side discharge. This gas model suits users who prefer mechanical reliability and versatile grass management options.
- 201cc 4-cycle OHV engine provides 9.0 ft·lb of torque.
- 8-position cutting height adjustment ranges from 1.2" to 3.75".
- Self-propelled drive reduces manual pushing effort.
- 3-in-1 versatility supports mulching, bagging, and side discharge.
- Fixed walking speed limits speed control compared to variable drive models.
- 89.2-pound weight is heavier than many lighter electric alternatives.
- Single lever adjustment synchronizes all four wheels, limiting individual wheel height settings.
- You want a self-propelled gas mower with mulching and bagging capabilities.
- You need an 8-position height adjustment for varied lawn conditions.
- You prefer a single-lever mechanism for quick height changes.
- You require variable speed control for the self-propelled drive.
- You need a lighter mower for easy storage or transport.
- You prefer electric power over gas engines.
Verdict: BILT HARD 21" Self-Propelled Gas Mower fits users who value a robust 201cc engine and versatile grass handling. It is ideal for those who want a durable, mechanical solution with adjustable cutting heights.
EGO Power+ 21-Inch Self-Propelled Cordless Mower
Best for: Medium to large lawns needing long runtime
- Cutting Width
- 21-Inch
- Drive Type
- Self-Propelled
- Voltage
- 56V
- Battery Capacity
- 7.5Ah, 5.0Ah
- Run Time
- Up to 60 minutes
- Motor Type
- Brushless
This EGO mower features a 56V brushless motor and self-propelled drive. It includes a 7.5Ah battery for up to 60 minutes of runtime, plus a 5.0Ah extra battery. The Select Cut system offers interchangeable blades for mulching or bagging. You get variable speed control via a dial. This setup suits larger lawns where extended runtime matters. It delivers torque that exceeds many gas models.
- 56V brushless motor for high cutting torque
- Up to 60 minutes runtime with 7.5Ah battery
- Includes extra 5.0Ah battery for extended use
- Self-propelled with variable speed dial control
- Select Cut system with mulching and bagging blades
- Single 21-inch cutting width limits efficiency on very large areas
- Self-propelled drive requires battery power, reducing total runtime compared to gas
- Extra battery ships separately, delaying full setup
- You need up to 60 minutes of continuous cutting time
- You want self-propelled ease with variable speed control
- You prefer mulching or bagging with interchangeable blades
- You need a push-only mower for flat, small yards
- You require a wider 22-inch or larger cutting deck
- You prefer gas engines for unlimited runtime
Verdict: EGO 56V 21-Inch Self-Propelled Mower fits users who prioritize runtime and self-propelled convenience for medium to large lawns. The included dual batteries and variable speed dial make it a strong spec choice for electric users.
Greenworks 48V 21" Self-Propelled Mower with 12" Trimmer
Best for: Users wanting a mower, trimmer, and blower combo
- Cutting Width
- 21-Inch
- Drive Type
- Self-propelled
- Voltage
- 48 V
- Battery Capacity
- 5.0 Ah
- Run Time
- Up to 35 minutes
- Mowing Functions
- 4-in-1 (rear bag, mulch, side discharge)
This Greenworks kit includes a 21-inch self-propelled mower with a 48V brushless motor. It offers 4-in-1 mowing functions and 7 height positions. The package adds a 12-inch trimmer and a leaf blower for 320 CFM airflow. You get two 5.0Ah batteries for up to 35 minutes of runtime. The 43-pound unit features a steel deck and LED headlights. It suits those wanting a complete yard care set.
- 48V brushless motor delivers high torque
- Includes 12-inch trimmer and leaf blower
- 7-position height adjustment from 1 3/8 to 4 inches
- 4-in-1 mowing with rear bag and mulch
- LED headlights for visibility in low light
- Leaf blower runtime is only 10 minutes on high
- Mower weight is 43 pounds
- Mower runtime is up to 35 minutes
- You want a mower, trimmer, and blower in one box
- You need a self-propelled mower for slopes up to 21 degrees
- You prefer a steel deck for durability
- You need more than 35 minutes of continuous mowing
- You want a lighter unit for easy transport
- You only need a mower without extra tools
Verdict: Greenworks 21-Inch Self-Propelled Mower Combo is a complete yard care system for users who value versatility and extra tools like a blower. It fits those who need a durable steel deck and self-propelled ease for uneven terrain.
Greenworks 80V 21-Inch Cordless Push Mower
Best for: small lawns under half an acre
- Cutting Width
- 21-Inch
- Drive Type
- Push
- Voltage
- 80V
- Battery Capacity
- 2.0 Ah
- Run Time
- Up to 60 minutes
- Mowing Functions
- 3-in-1 (mulch, rear bag, side discharge)
This Greenworks 80V push mower features a 21-inch cutting width and a TruBrushless motor. It includes two 2.0 Ah batteries for up to 60 minutes of run time. The unit offers 5-position height adjustment and 3-in-1 mulching, bagging, and side discharge. Its compact 18.2-inch width makes it easy to maneuver. You should choose this model if you want a lightweight, maintenance-free option for small to medium lawns.
- 80V TruBrushless motor provides gas-like performance
- Includes two 2.0 Ah batteries for up to 60 minutes of runtime
- 5-position single-lever height adjustment
- 3-in-1 mulch, rear bag, and side discharge functions
- Compact 18.2-inch width for easy maneuverability
- 2.0 Ah battery capacity is lower than the 4.0 Ah or 5.0 Ah options in this list
- Push drive type lacks self-propelled assistance found in most other picks
- 5-position height adjustment offers fewer settings than the 6-position options on the list
- You have a small lawn under half an acre
- You prefer a lightweight, maintenance-free push mower
- You want quick charging with the included rapid charger
- You need self-propelled drive for hilly terrain
- You require a larger battery capacity for extended run times
- You prefer more than 5 height adjustment positions
Verdict: Greenworks 80V 21-Inch Push Mower is a practical choice for small yards where maneuverability and low maintenance matter more than raw power or self-propulsion. It suits users who do not need the extended runtime of larger battery kits.
Honda 21-Inch Cordless Self-Propelled Lawn Mower
Best for: Small yards needing Honda service support
- Cutting Width
- 21-Inch
- Drive Type
- Self-propelled
- Battery Capacity
- 8 Ah
- Run Time
- Up to 30 minutes
- Mowing Functions
- Mulch, bag, discharge
- Height Adjustments
- 7 positions, 1-4 in
This Honda HRN-BV is a 21-inch self-propelled mower powered by an 8 Ah lithium-ion battery. It offers up to 30 minutes of run time per charge, covering roughly a quarter acre. The Smart Drive system adjusts speed from 0 to 3.8 mph across five positions. You get a 1.9-bushel bag and a twin-blade MicroCut system for fine mulching. The build weighs 108 pounds and includes a three-year residential warranty.
- Smart Drive variable speed control adjusts from 0 to 3.8 mph
- 7-position height adjustment ranges from 1 to 4 inches
- Twin-blade MicroCut System provides superior mulching and bagging
- Nationwide service network and parts support available
- 8 Ah battery capacity limits run time to about 30 minutes
- 108-pound weight is heavier than many lighter cordless alternatives
- 1.9-bushel grass bag capacity is smaller than some larger models
- You want Honda reliability and nationwide service support
- You need precise speed control between 0 and 3.8 mph
- You prefer a twin-blade system for fine mulching
- You need to mow more than a quarter acre per charge
- You prefer a lighter mower under 100 pounds
- You require a larger grass collection bag than 1.9 bushels
Verdict: Honda HRN-BV 21-Inch Self-Propelled suits homeowners who value brand service networks and precise speed control over maximum battery capacity. It fits small to medium yards where the 30-minute runtime is sufficient.
PowerSmart 21-Inch 170cc Self-Propelled Gas Mower
Best for: slopes and uneven terrain
- Cutting Width
- 21-Inch
- Drive Type
- Self-propelled (rear-wheel drive)
- Mowing Functions
- 3-in-1 (mulch, side discharge, bag)
- Motor Type
- 4-stroke OHV, 170 cc
- Height Adjustments
- 6 positions (1.5" – 3.9")
- Power Type
- Gas
This PowerSmart gas mower features a 170cc 4-stroke OHV engine and rear-wheel drive for self-propelled operation. It includes a steel deck and offers 3-in-1 mowing functions with mulching, side discharge, or bagging. You can adjust the cutting height across six positions from 1.5 to 3.9 inches. The foldable handle aids storage. It weighs 59 pounds and measures 56.5 inches long.
- 170cc 4-stroke OHV engine with auto choke
- Rear-wheel drive self-propelled system
- Durable steel deck construction
- 6-position height adjustment from 1.5 to 3.9 inches
- 3-in-1 versatility for mulching, side discharge, or bagging
- Heavier build at 59 pounds compared to many cordless competitors
- Lower engine displacement of 170cc versus higher cc options in the list
- Fewer height adjustment positions than some premium models offering more settings
- You need reliable self-propelled traction on slopes or uneven terrain
- You prefer gas power for longer runtime without battery swaps
- You want a durable steel deck for long-lasting performance
- You prioritize lightweight maneuverability for small yards
- You prefer electric power for zero emissions and quiet operation
- You need higher engine power for extremely thick or wet grass
Verdict: PowerSmart 21-Inch Gas Mower suits homeowners who want a durable, self-propelled gas mower with a steel deck. It is a solid choice for medium-sized lawns where rear-wheel drive traction and mulching versatility matter most.
Greenworks 48V 21-Inch Self-Propelled Mower
Best for: Medium lawns needing quiet operation
- Cutting Width
- 21-Inch
- Drive Type
- Self-propelled
- Voltage
- 48V
- Battery Capacity
- 5Ah
- Run Time
- Up to 45 minutes
- Mowing Functions
- 4-in-1 (mulch, bag, discharge, turbo)
This Greenworks mower combines two 24V batteries for 48V power. It features a 21-inch cutting width and a brushless motor. The self-propelled rear-wheel drive includes variable speed control. You get up to 45 minutes of run time with the included 5Ah batteries. The 4-in-1 system handles mulching, bagging, and discharge. It suits users wanting quiet operation and LED lighting.
- 48V system from two 24V batteries
- Brushless motor for quiet operation
- Up to 45 minutes run time
- Self-propelled rear-wheel drive
- LED headlight included
- 77 pounds weight is heavier than some competitors
- 45-minute run time is lower than 60V or 80V models
- Variable speed control lacks specific numeric range
- You prefer a 48V battery platform
- You need quiet operation for early mornings
- You want a self-propelled mower with LED lighting
- You need run time exceeding 45 minutes
- You prefer a lighter push mower
- You want a 60V or 80V system
Verdict: Greenworks 48V 21-Inch Self-Propelled Mower offers a balanced mix of power and runtime for medium lawns. It fits users who value quiet brushless motors and integrated LED lighting over maximum voltage.
Specifications side by side
| Spec | Greenworks 40V 21-Inch Self-Propelled Mower | Greenworks 60V 21-Inch Self-Propelled Mower | EGO Power+ 21-Inch Cordless Self-Propelled Lawn Mower | EGO Power+ 21-Inch 56V Cordless Mower | Worx 21-Inch 40V Cordless Push Lawn Mower | EGO Power+ 21-Inch Cordless Self-Propelled Lawn Mower | SENIX 21-Inch 170cc Self-Propelled Gas Mower | Greenworks 80V 21-Inch Cordless Push Mower | BILT HARD 21-Inch 201cc Self-Propelled Gas Mower | EGO Power+ 21-Inch Self-Propelled Cordless Mower | Greenworks 48V 21" Self-Propelled Mower with 12" Trimmer | Greenworks 80V 21-Inch Cordless Push Mower | Honda 21-Inch Cordless Self-Propelled Lawn Mower | PowerSmart 21-Inch 170cc Self-Propelled Gas Mower | Greenworks 48V 21-Inch Self-Propelled Mower |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cutting Width | 21 in | 21" | 21 in | 21" | 21" | 21" | 21 in | 21" | 21" | – | 21 inches | 21" | 21 in | 21 in | 21 in |
| Drive Type | self-propelled | self-propelled | Self-propelled | – | Push | self-propelled | Self-propelled, FWD | Push | Self-Propelled | Self-Propelled | Self-propelled | Push | Self-propelled | Self-propelled (rear-wheel drive) | Self-propelled |
| Voltage | 40 V | 60V | 56V | 56V | 40V | 56V | – | 80V | – | 56V | 48 V | 80V | – | – | 48V |
| Battery Capacity | 5.0 Ah | 2 x 4.0Ah | 7.5Ah | 6.0Ah | 5.0Ah | 6.0Ah | – | 4.0 Ah | – | 7.5Ah, 5.0Ah | 5.0 Ah | 2.0 Ah | 8 Ah | – | 5Ah |
| Run Time | – | – | Up to 60 minutes | up to 55 minutes | – | up to 50 minutes | – | Up to 60 minutes | – | Up to 60 minutes | Up to 35 minutes | Up to 60 minutes | Up to 30 minutes | – | Up to 45 minutes |
| Mowing Functions | 4-in-1 | 4-in-1 (mulch, bag, discharge) | – | – | 3-in-1 | 3-in-1 (mulch, bag, side discharge) | 3-in-1 (mulch, bag, side discharge) | 3-In-1 (mulch, rear bag, side discharge) | 3-in-1 | – | 4-in-1 (rear bag, mulch, side discharge) | 3-in-1 (mulch, rear bag, side discharge) | Mulch, bag, discharge | 3-in-1 (mulch, side discharge, bag) | 4-in-1 (mulch, bag, discharge, turbo) |
| Motor Type | brushless | brushless | Brushless | brushless | Brushless | brushless | 170 cc 4-cycle OHV gas | Brushless | 201cc 4-cycle OHV | Brushless | Brushless | TruBrushless | – | 4-stroke OHV, 170 cc | Brushless |
| Height Adjustments | – | – | – | – | 7-position, 1.5" – 4" | 7 positions, 1.25 to 4 inches | 6 positions, 1.25-3.75 in | 7-position | 8-position (1.2" to 3.75") | – | 7-position, 1 3/8" – 4" | 5-position | 7 positions, 1-4 in | 6 positions (1.5" – 3.9") | – |
| Power Type | – | – | Cordless | Cordless | Cordless | Cordless | Gas | – | Gas | Cordless | Cordless | Gas | – | Gas | – |
| Engine Displacement | – | – | – | – | – | – | 170cc | – | – | – | – | – | – | 170cc | – |
| Application | Slopes | Large Yards | – | – | 1/2 Acre | – | – | Large Yards | – | – | – | – | – | – | – |
| Lawn Size | – | 3/4 Acre | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Included Equipment | – | – | – | – | – | – | – | – | – | – | Leaf Blower | – | – | – | – |
| Engine Stroke | – | – | – | – | – | – | – | – | – | – | – | – | – | 4-Stroke | – |
| Dimensions | 65 × 25.6 × 41 inches | 68.9 × 25.6 × 42.1 inches | 39 × 17 × 66 inches | 67.5 × 22.4 × 36.2 inches | 60 × 22 × 40.9 inches | 67.7 × 22.4 × 36.3 inches | 61 × 22.8 × 41.5 inches | 32.3 × 18.2 × 20.4 inches | – | – | 62 × 22 × 38 inches | 32.3 × 18.2 × 20.4 inches | 62.2 × 22.6 × 40.8 inches | 56.5 × 22 × 42.5 inches | 62 × 21.7 × 41.4 inches |
| Weight | 73.9 pounds | 65 pounds | 55.3 pounds | 82 pounds | 55.6 pounds | 50.9 pounds | 61.7 pounds | 74.1 pounds | 89.2 pounds | – | 43 pounds | – | 108 pounds | 59 pounds | 77 pounds |
| Size | 21" Self-Propelled (5.0Ah) + LED Lights | 21"SP w/2 x 4.0Ah Batteries | 21" | 21 inches wide | – | – | 21 Inch-170cc-6 Position | 21" Push | 21 inch self propelled | – | 48V (2x24V) 21" Mower combo | 21 in Mower (2 x 2.0Ah) | – | 21 Inch-170cc | 21" SP Mower (2×5.0Ah) |
| Color | Green&Black | Green and Black | Black | Green | Black and Orange | Black | Blue | Black/Green | – | Green | GREEN | Green | Red | Black | Green |
| Model | MO40L517 | MO60L424 | LM2135SP | LM2114 | WG752 | LM2114SP | A025054-A | 2501202 | TMA-0562-N3-0513 | LM2135SP | 1341002-VK | GLM801602 | HRN216YXBVKA4 | DB8621S | MO48L520 |
You can evaluate engine displacement and deck widths across the best 21 Inch lawn mowers for your yard.
How we selected these mowers
We identified products by scanning Amazon listings for the specific phrase 21-Inch in the title or feature list. This ensures every mower in the guide offers the same cutting width for consistent comparison. We included only one variant per product family to avoid duplicate entries. All data comes directly from published specifications on the listing pages. We did not handle or test these units personally. The selection relies entirely on the details manufacturers provide in their official product descriptions. We ordered the list by availability first. Then we ranked them by overall rating weighted by review count. Finally, we prioritized listings that met more of our core criteria. This method keeps the focus on verified specs rather than subjective impressions. You can trust that every item listed meets the stated width requirement.
Key Specs for Choosing a Mower
Check Drive Type
Select self-propelled models for slopes or large lawns to reduce physical effort. The Greenworks 40V 21-Inch Self-Propelled Mower suits users needing variable speed traction on uneven terrain. Choose push models for small, flat yards under half an acre. The Worx 21-Inch 40V Cordless Push Lawn Mower fits these areas well. Push mowers are lighter and easier to store but require more effort. Self-propelled units add weight but provide consistent forward motion without manual pushing.
Match Voltage to Power
Higher voltage often correlates with more cutting power for thick grass. The Greenworks 80V 21-Inch Cordless Push Mower offers high voltage for robust performance. The EGO Power+ 21-Inch 56V Cordless Mower provides similar power levels. Lower voltage models like the 40V Greenworks are sufficient for lighter tasks. Match the voltage to your grass type and yard size. Higher voltage systems may require larger batteries, which increases overall unit weight.
Review Battery Capacity
Battery capacity in Amp-hours determines runtime per charge. The Greenworks 40V model includes a 5.0 Ah battery for extended use. The EGO Power+ 21-Inch Self-Propelled Cordless Mower also uses a 5.0 Ah battery for long runtime. Smaller capacities like 2.0 Ah suit small lawns under half an acre. Check the included battery count. Some kits include two batteries for continuous mowing without waiting for a recharge.
Compare Engine Displacement
Gas mowers use cubic centimeters to indicate engine size. The SENIX 21-Inch 170cc Self-Propelled Gas Mower offers a 170cc engine for consistent power. The PowerSmart 21-Inch 170cc Self-Propelled Gas Mower also features a 170cc engine. The BILT HARD 21-Inch 201cc Self-Propelled Gas Mower provides a larger 201cc engine for tougher conditions. Higher displacement generally means more torque for dense grass. Gas engines do not require battery charging.
Evaluate Mowing Functions
Check if the mower mulches, bags, or discharges grass. The Worx 21-Inch 40V Cordless Push Lawn Mower offers 3-in-1 functionality for mulching, bagging, and side discharge. The SENIX 21-Inch 170cc Gas Mower also provides 3-in-1 versatility. Mulching returns nutrients to the lawn. Bagging collects clippings for a clean look. Side discharge is useful for tall grass. Choose the function that matches your lawn care routine and disposal preferences.
Frequently asked questions
Which 21-inch mower is best for slopes?
The Greenworks 40V 21-Inch Self-Propelled Mower suits users needing variable speed traction on slopes. It includes LED lights for low-light visibility. The self-propelled drive helps you maintain control on uneven terrain. This model prioritizes traction over raw voltage power.
Do I need a self-propelled mower for a flat yard?
No, a push model works well for small, flat yards under half an acre. The Worx 21-Inch 40V Cordless Push Lawn Mower fits these conditions. It weighs 55.6 pounds and offers mulching efficiency. You save money by skipping the self-propelled mechanism.
What is the lightest 21-inch mower on this list?
The Greenworks 48V 21" Self-Propelled Mower with 12" Trimmer weighs 43 pounds. It is the lightest option available. This combo includes a leaf blower for extra versatility. It features a steel deck and self-propelled ease for handling uneven terrain.
Which mower offers the longest battery runtime?
The EGO Power+ 21-Inch Self-Propelled Cordless Mower fits users prioritizing runtime for medium to large lawns. It includes dual batteries for extended use. The variable speed dial adds convenience. This 56V model balances power and duration for larger cutting areas.
Are there gas-powered 21-inch mowers in this guide?
Yes, the SENIX 21-Inch 170cc Self-Propelled Gas Mower and PowerSmart 21-Inch 170cc model are included. The SENIX suits flat yards up to 1/3 acre. The PowerSmart features a 4-stroke engine. Both offer durable steel decks and mulching capabilities.
Which mower has the highest voltage battery?
The Greenworks 80V 21-Inch Cordless Push Mower offers 80V power. It suits users prioritizing quiet operation and zero emissions. It weighs 74.1 pounds. This model is ideal for flat, smaller lawns where manual pushing is manageable.
Can I mulch with these 21-inch mowers?
Most listed mowers support mulching. The Worx 21-Inch 40V model offers 3-in-1 functions including mulching. The SENIX 170cc gas mower also includes mulching. The BILT HARD 21-Inch gas mower provides versatile grass handling with mulching, bagging, and side discharge options.
Which mower is best for medium lawns?
The Greenworks 60V 21-Inch Self-Propelled Mower fits homeowners with medium to large yards. It offers self-propelled ease and quiet operation. The brushless motor provides a solid balance of power. It is ideal for regular maintenance tasks on medium-sized lawns.
