Best 21 Inch Lawn Mower Under $300 (2026)
Cordless and gas 21 inch push mowers compared by battery, runtime, cutting heights and warranty for small lawns.
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Top picks at a glance
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- 1
Smart DisplaySENIX 60V Mower9.6/10View on Amazon - 2
Longest RuntimeLitheli 21 in Mower9.6/10View on Amazon - 3
Highest VoltagePowerSmart 80V Mower9.5/10View on Amazon - 4
Dual BatteryKraftSense 40V Mower9.4/10View on Amazon - 5
Gas OptionSENIX Gas Mower9.5/10View on Amazon - 6
BILT HARD 21" Self Propelled Gas Lawn MowerView on Amazon - 7
BLACK+DECKER Electric Lawn MowerView on Amazon - 8
BLACK+DECKER 3-in-1 String Trimmer/Edger & Lawn MowerView on Amazon - 9
LawnMaster MEB1114K Electric Corded Lawn Mower 15-Inch 11AMPView on Amazon - 10
BLACK+DECKER Electric Lawn Mower with Bike HandleView on Amazon
A suburban lawn stretches past fences and flower beds, with grass that grows fast in warm weather and a storage shed that is already full. For that kind of yard, best 21 inch lawn mower under 300 is the right search: a walk-behind mower wide enough to finish the lawn without a long session, and priced within the limit in the keyword.
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Quick picks
- Smart Display SENIX 60V Mower: 60V mower with a smart display, 7 heights and a 1.7-bushel bag Check price on Amazon
- Longest Runtime Litheli 21 in Mower: Up to 45 minutes of runtime with 2 x 8.0Ah batteries and 8 cutting heights Check price on Amazon
- Highest Voltage PowerSmart 80V Mower: 80V brushless mower with a 21-inch steel deck and up to 40 minutes of runtime Check price on Amazon
- Dual Battery KraftSense 40V Mower: 40V mower with 2 x 4.0Ah batteries, 8 positions and a 60L bag Check price on Amazon
- Gas Option SENIX Gas Mower: 21-inch gas push mower with a 144cc engine, per its title Check price on Amazon
Our acreage picks
SENIX 60V 21 in Cordless Push Lawn Mower, 6.0Ah
Cordless push mower with a 60V battery, a 21-inch width, 7 heights and a smart display.
Who it's for: owners who want a display, a bag and height choice on a 21-inch cordless mower.
Who should skip it: anyone who needs a stated runtime in minutes or a steel deck stated in the listing.
Read the full review
The SENIX mower is a 60V cordless push mower with a 6.0Ah battery, a 21-inch width, 7 cutting heights from 1.5 in to 4 in, mulching, bagging and side discharge, a 1.7-bushel bag, a smart display with a charge level indicator. The warranty is a 2-year limited warranty. The listing claims 50% more cutting power than 40V models and 60% quieter operation than gas mowers, reported here as the maker's claim.
Pros
- 60V battery with a 6.0Ah capacity stated in the listing
- 7 cutting heights from 1.5 in to 4 in
- Mulching, bagging and side discharge listed
- Smart display with a charge level indicator
Cons
- Runtime in minutes is not stated in the listing
- Battery arrives with a 30-80% charge and needs a full charge before use
- No cutting height below 1.5 in is stated
- No steel deck material is stated in the listing
Litheli 21 in Cordless Lawn Mower, 40V, 2 x 8.0Ah
Cordless push mower with a 40V brushless motor, 2 x 8.0Ah batteries and 8 cutting heights.
Who it's for: owners who want long runtime and compact storage for a small shed.
Who should skip it: anyone who needs bagging or mulching stated, or acreage per charge stated.
Read the full review
The Litheli mower is a 40V cordless push mower with a brushless motor, 2 x 8.0Ah batteries, up to 45 minutes of runtime, 8 cutting heights from 0.98 in to 4 in, a 4-position handle for users 5.3-6.7 ft, a foldable design with vertical storage, and 2 spare blades. The warranty is 2 Years.
Pros
- Up to 45 minutes of runtime stated
- 8 cutting heights from 0.98 in to 4 in
- 2 spare blades included as standard
- Foldable design with vertical storage stated
Cons
- Acreage covered per charge is not stated
- Bag, mulch or discharge function is not stated
- No smart display or charge indicator is stated
- Voltage is 40V, below the 60V and 80V listings here
PowerSmart 80V 21 in Cordless Push Lawn Mower, 6.0Ah
Cordless push mower with an 80V brushless motor, a 21-inch steel deck and a 6.0Ah battery.
Who it's for: owners who want high voltage and a steel deck for up to 1/2 acre.
Who should skip it: anyone who wants a stated warranty or stated mulching, bagging or discharge.
Read the full review
The PowerSmart mower is an 80V cordless push mower with a brushless motor, a 21-inch steel deck, a 6.0Ah battery with 432Wh, up to 40 minutes of runtime and up to 1/2 acre per charge, a full recharge in 90 minutes, 6 height positions and collapsible handles. The spec table lists a size of 1 pcs Pack of 25, which does not match a single mower; the title and bullets are trusted over the spec table here.
Pros
- 80V brushless motor stated
- 21-inch steel deck stated
- Up to 40 minutes of runtime and up to 1/2 acre per charge stated
- Recharges fully in 90 minutes with a push-button start
Cons
- No warranty term is stated
- Spec table lists a pack size that does not match a single mower
- No mulching, bagging or discharge function is stated
- No cutting height range in inches is stated, only 6 positions
SENIX LSPG-M14 21-Inch 144cc Gas Push Lawn Mower
Gas push mower with a 21-inch steel deck, a 144cc OHV engine, 3-in-1 mowing with a 1.7-bushel bag, 11-inch rear wheels and a 2-year warranty.
Who it's for: homeowners with yards up to 1 acre who want a lightweight gas mower with full 3-in-1 bagging versatility and larger rear wheels.
Who should skip it: anyone mowing steep banks who needs self-propelled drive or those seeking battery power.
Read the full review
The SENIX LSPG-M14 features a 144cc 4-cycle OHV engine delivering 3.4 HP and 5.8 ft-lb of torque, pre-filled with engine oil. Its 21-inch steel deck handles mulching, side discharge and rear bagging with an included 1.7-bushel grass catcher. Dual levers set 6 cutting heights from 1.25 to 3.75 inches, rolling on 8-inch front and 11-inch rear wheels. The listing includes a 2-year limited warranty and states a weight of 54.2 pounds. A contradiction appears between the spec table, which lists 8-inch wheels and stainless steel, and the bullets, which cite 11-inch rear wheels and a steel deck.
Pros
- 2-year limited warranty stated on the listing
- Full 3-in-1 capability with a 1.7-bushel grass bag included
- 11-inch rear wheels paired with 8-inch front wheels for rougher ground
- Lightweight gas push mower at 54.2 lb
Cons
- Spec table lists wheel size as 8 inches while bullets state 11-inch rear wheels
- Spec table lists material as stainless steel while bullets state a steel deck
- Push drive requires manual effort on slopes
- No safety bail or operator presence controls are stated in the listing
KraftSense 21 in Cordless Lawn Mower, 40V, 2 x 4.0Ah
Cordless push mower with a 40V dual-battery system, 2 x 4.0Ah batteries and 8 height positions.
Who it's for: owners of lawns up to 1/4 acre with fences and beds.
Who should skip it: anyone who needs a stated warranty, weight or charging time.
Read the full review
The KraftSense mower is a 40V cordless push mower with a dual-battery system, 2 x 4.0Ah batteries, up to 40 minutes of runtime and up to 1/4 acre, a brushless motor, 8 height positions from 1.2 in to 4 in and mulching, side discharge and bagging with a 60L bag. The listing claims the brushless motor lasts 10x longer than standard motors, reported here as the maker's claim.
Pros
- 2 x 4.0Ah batteries with up to 40 minutes of runtime stated
- 8 height positions from 1.2 in to 4 in
- Mulching, side discharge and bagging with a 60L bag
- Close-edge cutting design for fences, walls, flower beds and garden borders
Cons
- No warranty term is stated
- Coverage is stated as up to 1/4 acre
- No weight is stated in the listing
- No charging time is stated
Other machines to compare
BILT HARD 21" Self Propelled Gas Lawn MowerCheck price on Amazon
BLACK+DECKER Electric Lawn MowerCheck price on Amazon
BLACK+DECKER 3-in-1 String Trimmer/Edger & Lawn MowerCheck price on Amazon
LawnMaster MEB1114K Electric Corded Lawn Mower 15-Inch 11AMPCheck price on Amazon
BLACK+DECKER Electric Lawn Mower with Bike HandleCheck price on Amazon
Side-by-side specs
| Model | Acre Score | Type | Cutting width | Battery or engine | Warranty |
|---|---|---|---|---|---|
| SENIX 60V Mower | 9.6/10 | Cordless push | 21 in | 60V, 6.0Ah | 2-year limited warranty |
| Litheli 21 in Mower | 9.6/10 | Cordless push | 21 in | 40V, 2 x 8.0Ah | 2 Years |
| PowerSmart 80V Mower | 9.5/10 | Cordless push | 21 in | 80V, 6.0Ah | Not stated |
| KraftSense 40V Mower | 9.4/10 | Cordless push | 21 in | 40V, 2 x 4.0Ah | Not stated |
| SENIX Gas Mower | 9.5/10 | Gas push | 21 in | 144cc | Not stated |
Specifications are manufacturer listed, collected 29 October 2026.
Acreage and terrain fit
SENIX 60V Mower
Litheli 21 in Mower
PowerSmart 80V Mower
KraftSense 40V Mower
SENIX Gas Mower
How They Were Scored
The Acre Score weighs 5 factors: performance, build quality, value, safety and warranty. A factor the listing does not state scores zero.
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| SENIX 60V Mower | 9.6 | 32 | 22 | 21 | 0 | 3 |
| Litheli 21 in Mower | 9.6 | 30 | 21 | 21 | 0 | 3 |
| PowerSmart 80V Mower | 9.5 | 30 | 22 | 20 | 0 | 0 |
| KraftSense 40V Mower | 9.4 | 28 | 20 | 21 | 0 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
Best 21 Inch Lawn Mower Under 300: What to Compare
Battery and runtime
Voltage and battery capacity differ across the cordless picks. The SENIX mower lists 60V with a 6.0Ah battery, the Litheli mower lists 40V with 2 x 8.0Ah batteries, the PowerSmart mower lists 80V with a 6.0Ah battery and 432Wh, and the KraftSense mower lists 40V with 2 x 4.0Ah batteries. Runtime is stated for 3 of them: up to 45 minutes for the Litheli mower, up to 40 minutes for the PowerSmart mower, and up to 40 minutes for the KraftSense mower. Runtime in minutes is not stated for the SENIX mower, so check for a stated runtime.
Cutting heights and width
All 5 picks list a 21-inch width, so width does not separate them. Cutting heights do: the Litheli mower lists 8 cutting heights from 0.98 in to 4 in, the SENIX mower lists 7 cutting heights from 1.5 in to 4 in, the KraftSense mower lists 8 positions from 1.2 in to 4 in, and the PowerSmart mower lists 6 positions with no inch range stated.
Mulching, bagging and discharge
Only 2 listings state a full grass-management set. The SENIX mower lists mulching, bagging and side discharge, with a 1.7-bushel bag, and the KraftSense mower lists mulching, side discharge and bagging with a 60L grass collection bag. The Litheli, PowerSmart and gas listings do not state mulching, bagging or discharge, so check for a stated bagging function.
Storage and handling
Storage matters when shed space is tight. The Litheli mower lists a foldable design with vertical storage, and the PowerSmart mower lists collapsible handles for compact storage. Weight is stated for 2 picks: 54.0 Pounds for the SENIX mower and 55.0 pounds for the PowerSmart mower. Weight is not stated for the other listings.
Slopes
None of the listings states a slope figure. The SENIX listing states that it handles thick grass, rough terrain and slopes, but no maximum slope figure is stated, so do not infer a figure. Walk within the manual limits for the mower in hand, clear debris before mowing, and use eye and hearing protection while mowing.
Turn rise and run, or a phone level reading, into degrees and percent, then compare it with typical mower slope ratings.
Walk the area first and clear stones, sticks, wire and toys. Wear eye and hearing protection, long pants and sturdy closed footwear, mow across slopes with a walk-behind (not up and down), and never pull a running mower toward you. Keep kids and pets well away. Refuel only with the engine off and cool. See CPSC lawn mower safety. Read our Safety Disclaimer.
Matching It to Your Property
- 21-inch width for lawns with fences and beds, with close-edge cutting stated on the KraftSense mower.
- Rough terrain and slopes: the SENIX listing states handling for thick grass, rough terrain and slopes, with no slope figure stated.
- Storage: foldable vertical storage stated on the Litheli mower and collapsible handles stated on the PowerSmart mower.
- Acreage per charge: up to 1/2 acre stated on the PowerSmart mower and up to 1/4 acre stated on the KraftSense mower, with no acreage per charge stated on the other listings.
FAQ: mowing large lots
How long does a cordless mower run on a charge?
It depends on the listing: up to 45 minutes for the Litheli mower, up to 40 minutes for the PowerSmart mower, and up to 40 minutes for the KraftSense mower. Runtime in minutes is not stated for the SENIX mower, and no runtime is stated for the gas mower.
What cutting heights do these mowers offer?
The Litheli mower lists 8 cutting heights from 0.98 in to 4 in, the SENIX mower lists 7 cutting heights from 1.5 in to 4 in, the KraftSense mower lists 8 positions from 1.2 in to 4 in, and the PowerSmart mower lists 6 positions with no inch range stated. Cutting heights are not stated for the gas mower.
Do these mowers mulch, bag or discharge?
The SENIX mower and the KraftSense mower state mulching, bagging and discharge, with a 1.7-bushel bag on the SENIX mower and a 60L bag on the KraftSense mower. Mulching, bagging or discharge is not stated for the Litheli mower, the PowerSmart mower or the gas mower.
How does the gas mower differ from the cordless mowers here?
The gas mower is listed only by title, as a 21-inch gas push mower with a 144cc engine, while the cordless mowers list battery voltage, battery capacity and, in 3 cases, runtime. For a closer look at gas options, see the best gas lawn mower under 300 and the battery lawn mower vs gas comparison.
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