Buying Guide
Our Guide to the Best 21-Inch Lawn Mowers
Best 21-inch lawn mowers compared by cutting swath, drive type, battery workflow, weight, and bag capacity so you can match one to your yard.
By Gardening Is Ezee Editors
11 min read6 products evaluated
A 21-inch deck is the most common size for mid-size residential lawns, but the number on the box is the total machine width, not the actual cutting swath, and it says nothing about whether the mower is a push model, a self-propelled unit, or how much battery or fuel workflow comes with it.
We compared current 21-inch class mowers on drive type, included battery capacity where applicable, operating weight, bag size, and the tradeoffs each format brings so you can match a mower to your actual lawn instead of chasing a headline deck size.
Gardening Is Ezee field notes
The Garden Fit Check
A quick way to connect the shortlist to the space, workload and ownership details that matter after the box arrives.
- Start with the job
- EGO Power+ LM2114 21-Inch Cordless Mower leads this shortlist for buyers comparing capacity, compatibility, included components and storage needs. Use that fit as a reference point, then compare the alternatives against your own space and workload.
- Specs that separate the picks
- The first details to compare are 21-inch deck. Confirm the exact model and included components before ordering.
- Trade-off to plan for
- Push drive only, so larger or sloped lawns require more operator effort
The Practical Shortlist
A garden-first look at 6 options, organized around the job each one suits best.
Best Overall
EGO Power+ LM2114 21-Inch Cordless Mower
buyers comparing capacity, compatibility, included components and storage needs
Our take Check price for EGO Power+ LM2114 21-Inch Cordless Mower (opens in a new tab)
Best Self-Propelled
Greenworks 80V 21-Inch Self-Propelled Mower
medium to larger lawns where self-propel reduces walking effort
Our take Check price for Greenworks 80V 21-Inch Self-Propelled Mower (opens in a new tab)
Best Value
Greenworks 60V 21-Inch Push Mower
flat to gently sloped lawns where a larger included battery matters more than self-propel
Our take Check price for Greenworks 60V 21-Inch Push Mower (opens in a new tab)
Best for Mulching and Bagging
Worx WG752 40V 21-Inch 3-in-1 Mower
lawns needing flexible mulch, bag, or discharge switching in one machine
Our take Check price for Worx WG752 40V 21-Inch 3-in-1 Mower (opens in a new tab)
Best High-Rated Push Model
Greenworks 80V 21-Inch Push Mower
buyers who want the 80V platform's runtime without paying for self-propel
Our take Check price for Greenworks 80V 21-Inch Push Mower (opens in a new tab)
Best for Feature Set
SENIX X6 60V 21-Inch Self-Propelled Mower
buyers comparing capacity, compatibility, included components and storage needs
Our take Check price for SENIX X6 60V 21-Inch Self-Propelled Mower (opens in a new tab)
Why Each Pick Made the Cut
Best Overall1 of 6
EGO Power+ LM2114 21-Inch Cordless Mower on Amazon (opens in a new tab)
The strongest case for EGO Power+ LM2114 21-Inch Cordless Mower is 21-inch deck with battery and charger included.
Best for
- buyers comparing capacity, compatibility, included components and storage needs
Why it made the shortlist
For buyers comparing capacity, compatibility, included components and storage needs, this is one of the more relevant configurations in the shortlist. The documented setup centers on 21-inch deck, 56V battery platform, battery and charger included.
Its case starts with 21-inch deck with battery and charger included. Its 56V battery platform specification sits at between the lower and upper ends of the comparable range in this 6-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
The trade-off worth checking first is push drive only, so larger or sloped lawns require more operator effort. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 21-inch deck
- 56V battery platform
- Battery and charger included
- Push drive
Pros
- 21-inch deck with battery and charger included
- 56V platform shared across other EGO tools
Cons
- Push drive only, so larger or sloped lawns require more operator effort
- Included watt-hours should be checked against your lawn size before buying
Best Self-Propelled2 of 6
Greenworks 80V 21-Inch Self-Propelled Mower on Amazon (opens in a new tab)
Greenworks 80V 21-Inch Self-Propelled Mower is the better fit when medium to larger lawns where self-propel reduces walking effort.
Best for
- medium to larger lawns where self-propel reduces walking effort
Why it made the shortlist
The intended use case is medium to larger lawns where self-propel reduces walking effort. The documented setup centers on 21-inch deck, 80V 4.0Ah battery, self-propelled drive.
What separates it on paper is battery and charger included. Its 80V 4.0Ah battery specification sits at the upper end of the comparable range in this 6-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
Before committing, account for self-propel shares battery energy with the blade, shortening runtime versus push-only use. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 21-inch deck
- 80V 4.0Ah battery
- Self-propelled drive
- Battery and charger included
Pros
- Battery and charger included
- 80V pack gives more headroom than a 40V or 56V push mower
Cons
- Self-propel shares battery energy with the blade, shortening runtime versus push-only use
- Heavier than push models, which matters for storage and lifting over curbs
Best Value3 of 6
Greenworks 60V 21-Inch Push Mower on Amazon (opens in a new tab)
The strongest case for Greenworks 60V 21-Inch Push Mower is larger 5.0Ah included battery than several push competitors.
Best for
- flat to gently sloped lawns where a larger included battery matters more than self-propel
Why it made the shortlist
For flat to gently sloped lawns where a larger included battery matters more than self-propel, this is one of the more relevant configurations in the shortlist. The documented setup centers on 21-inch deck, 60V 5.0Ah battery, push drive.
Its case starts with larger 5.0Ah included battery than several push competitors. Its 60V 5.0Ah battery specification sits at between the lower and upper ends of the comparable range in this 6-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
The trade-off worth checking first is push drive only, so effort increases on slopes or larger lots. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 21-inch deck
- 60V 5.0Ah battery
- Push drive
- Battery and charger included
Pros
- Larger 5.0Ah included battery than several push competitors
Cons
- Push drive only, so effort increases on slopes or larger lots
Best for Mulching and Bagging4 of 6
Worx WG752 40V 21-Inch 3-in-1 Mower on Amazon (opens in a new tab)
The strongest case for Worx WG752 40V 21-Inch 3-in-1 Mower is 3-in-1 mulch, bag, and discharge switching.
Best for
- lawns needing flexible mulch, bag, or discharge switching in one machine
Why it made the shortlist
For lawns needing flexible mulch, bag, or discharge switching in one machine, this is one of the more relevant configurations in the shortlist. The documented setup centers on 21-inch deck, 40V battery platform, 3-in-1 mulch, bag, or side discharge.
Its case starts with 3-in-1 mulch, bag, and discharge switching. Its 40V battery platform specification sits at the lower end of the comparable range in this 6-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
The trade-off worth checking first is 40V platform has less headroom than the 60V or 80V options in this guide. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 21-inch deck
- 40V battery platform
- 3-in-1 mulch, bag, or side discharge
- Rated for up to 1/2 acre
Pros
- 3-in-1 mulch, bag, and discharge switching
- Manufacturer-rated for lawns up to about 1/2 acre
Cons
- 40V platform has less headroom than the 60V or 80V options in this guide
Best High-Rated Push Model5 of 6
Greenworks 80V 21-Inch Push Mower on Amazon (opens in a new tab)
Choose Greenworks 80V 21-Inch Push Mower for full 80V 4.0Ah battery energy goes to the blade with no drive motor drawing from it.
Best for
- buyers who want the 80V platform's runtime without paying for self-propel
Why it made the shortlist
Greenworks 80V 21-Inch Push Mower is positioned for buyers who want the 80V platform's runtime without paying for self-propel. The documented setup centers on 21-inch deck, 80V 4.0Ah battery, push drive.
The feature doing most of the work here is full 80V 4.0Ah battery energy goes to the blade with no drive motor drawing from it. Its 80V 4.0Ah battery specification sits at the upper end of the comparable range in this 6-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 21-inch deck
- 80V 4.0Ah battery
- Push drive
- Battery and charger included
Pros
- Full 80V 4.0Ah battery energy goes to the blade with no drive motor drawing from it
- Battery and charger included
Best for Feature Set6 of 6
SENIX X6 60V 21-Inch Self-Propelled Mower on Amazon (opens in a new tab)
Choose SENIX X6 60V 21-Inch Self-Propelled Mower for largest included battery capacity by amp-hours in this guide.
Best for
- buyers comparing capacity, compatibility, included components and storage needs
Why it made the shortlist
SENIX X6 60V 21-Inch Self-Propelled Mower is positioned for buyers comparing capacity, compatibility, included components and storage needs. The documented setup centers on 21-inch deck, 60V 8Ah battery, self-propelled with 7-level height adjustment.
The feature doing most of the work here is largest included battery capacity by amp-hours in this guide. Its 60V 8Ah battery specification sits at between the lower and upper ends of the comparable range in this 6-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
The practical constraint here is newer to market, so long-term reliability is less established. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 21-inch deck
- 60V 8Ah battery
- Self-propelled with 7-level height adjustment
- Smart display
Pros
- Largest included battery capacity by amp-hours in this guide
- Self-propelled with a 7-level height adjustment and smart display
- 3-in-1 cutting modes
Cons
- Newer to market, so long-term reliability is less established
How We Built This Shortlist
Each pick was assessed across 4 criteria weighted for real-world use.
- Deck and drive fit
- We compared each mower's cutting swath, drive type, and rated lawn size against typical mid-size residential lots before comparing headline specs.
- Battery and power workflow
- For battery models we compared included pack voltage and amp-hours, whether a charger came in the box, and how self-propel draws down that same energy.
- Handling and daily use
- Turning room around obstacles, push or drive effort, height adjustment range, and bag handling all affect how manageable a 21-inch mower feels week after week.
- Documented specifications
- We compared capacity, compatibility, included components, operating limits and warranty documentation.
What Matters Before You Choose a 21-Inch Lawn Mower
Key buying criteria so you get the right fit the first time.
Actual cutting swath vs total machine width
The 21-inch figure is usually the deck's outer width, and the true cutting swath (what actually gets clipped in a single pass) is typically an inch or so narrower once you account for the deck housing and wheel placement. Check the manufacturer's cutting width spec, not just the marketing deck size.
Getting this wrong is one of the more common reasons a lawn mowers purchase disappoints once it actually arrives, since actual cutting swath vs total machine width affects real day-to-day use in a way marketing photos and bullet points don't always make obvious.
Overlap and pass-count time savings
A wider effective swath needs fewer passes to cover the same lawn, but only if you overlap each pass slightly to avoid missed strips. Estimate total mowing time from swath width and lawn area, not deck size alone.
This is the kind of detail that looks minor in a spec list but shapes how satisfied you actually are with a lawn mowers weeks after buying, since overlap and pass-count time savings plays out differently in daily use than it does on paper.
Turning around tight obstacles
A 21-inch mower still needs clearance to turn around beds, trees, and fence corners. Self-propelled models with rear-wheel drive typically turn tighter than front-wheel-drive units, so check drive type if your yard has many obstacles.
Compare how each lawn mowers in this roundup actually handles turning around tight obstacles rather than assuming they're interchangeable on this point, since the listings here differ on it more than the headline specs suggest.
Operating weight and bag size
Battery packs and self-propel motors add weight that matters when lifting the mower over curbs, into a shed, or up stairs. Bag capacity affects how often you stop to empty clippings on a full mow.
Operating weight and bag size is easy to overlook next to flashier specs, but it's frequently the difference between a lawn mowers that fits your routine and one that quietly becomes a hassle.
When an adjacent deck size fits better
A 21-inch mower is a middle ground. Very small lots may be better served by a 16 to 19-inch push mower for easier storage and lighter weight, while larger open lawns may be better matched to a wider self-propelled or riding mower to reduce total pass count.
Getting this wrong is one of the more common reasons a lawn mowers purchase disappoints once it actually arrives, since when an adjacent deck size fits better affects real day-to-day use in a way marketing photos and bullet points don't always make obvious.
Match a 21-Inch Lawn Mower to Your Garden or Yard
Match the Property Before the Badge
| Buyer situation | Recommended direction |
|---|---|
| Want the most proven, widely reviewed option | EGO Power+ LM2114 21-Inch Cordless Mower |
| Larger lawn where self-propel matters most | Greenworks 80V 21-Inch Self-Propelled Mower |
| Compared using published specifications, included components, compatibility, and practical trade-offs. | Greenworks 60V 21-Inch Push Mower |
| Need to switch between mulch, bag, and discharge often | Worx WG752 40V 21-Inch 3-in-1 Mower |
| Want maximum runtime without paying for self-propel | Greenworks 80V 21-Inch Push Mower |
Choose the Right Drive Type
- Push drive
- Best for flat, smaller lawns where lower weight, lower cost, and simpler maintenance matter more than reduced walking effort.
- Self-propelled
- Best for larger or gently sloped lawns where reducing operator effort over a full mowing session outweighs the added weight and cost.
- 3-in-1 switching
- Best for lawns that change condition through the season, letting one mower mulch in spring and bag or discharge later without a second machine.
Real Ownership Checklist
| Cost or task | Verify before buying |
|---|---|
| Power | Battery voltage, amp-hours, and whether a charger is included in the box |
| Wear parts | Blades, and model-specific availability for replacement batteries |
| Logistics | Delivered deck width versus gate and shed clearance |
| Support | Warranty length and nearest authorized service for the brand |
Comfort and Workload Checklist
- During mowing
- Consider starting steps, handle height adjustment, push or drive effort, turning room around obstacles, and cutting height adjustment range.
- After mowing
- Check bag removal and capacity, deck cleaning, charging time between uses, folding for storage, and access to replacement parts.
Before You Bring One Home
Is 21 inches the actual cutting width or the total machine width?
The 21-inch figure is generally the deck's outer width. The true cutting swath is usually about an inch narrower once the housing and wheel placement are accounted for, so check the manufacturer's cutting width spec for precise pass planning.
Do I need self-propel on a 21-inch mower?
Self-propel mainly helps on larger lawns or gentle slopes where walking effort adds up over a full mowing session. On a small flat lawn, a lighter push model is often easier to store and maintain.
How much does battery voltage matter compared to amp-hours?
Voltage alone does not tell you runtime. Multiply the pack's voltage by its amp-hours for an approximate energy figure, then compare that against your lawn size and whether the mower is push or self-propelled, since self-propel shares that energy with the blade.
What should I verify before ordering?
Confirm the model number, dimensions, capacity, included components, compatibility, warranty coverage and storage requirements.
When should I choose a different deck size instead of 21 inches?
A smaller 16 to 19-inch mower can be easier to store and lift for very small lots, while a wider self-propelled or riding mower can cut total mowing time on large open lawns by reducing the number of passes needed.
Bottom Line
Best overall: EGO Power+ LM2114 21-Inch Cordless Mower — best overall pick in this roundup. See the full verdicts above for every pick, with pros, cons and who each one suits.
Browse all 21-inch lawn mowers on Amazon — Prime-eligible options with current pricing.