Best 40V Lawn Mowers
Best 40V Lawn Mowers compared by included battery energy, deck width, drive type, and real ownership cost so you can pick the right one without paying for capacity you will not use.
At a Glance
40V lawn mowers sit in the middle of the cordless lineup: more power than a compact 20V trimmer-class mower, less than the 56V and 80V decks built for larger properties. The voltage number on the box describes the battery platform, not the amount of energy stored inside a given pack.
Watt-hours (volts multiplied by amp-hours) are the better way to compare included runtime, and two mowers labeled 40V can ship with very different pack sizes, deck widths, and drive systems. We compared current 40V models on included battery energy, deck width, drive type, and what ownership actually costs after the box is opened.
5 Criteria to Look For Before Buying a 40V Lawn Mower
Key buying criteria so you get the right fit the first time.
Normalize by watt-hours, not the voltage label
Two 40V mowers can ship with different amp-hour packs. Multiply nominal volts by amp-hours to get an approximate watt-hour figure and compare that number, not the voltage printed on the box.
Runtime claims assume matched grass conditions
Manufacturer runtime figures are typically measured under favorable, dry, moderate-length grass. Tall, damp, dense, or freshly overgrown grass draws more current and shortens the same battery's usable runtime.
Charging and thermal delay
A depleted pack does not always accept a full-speed charge immediately, especially after a hot mowing session. Factor in charger wattage, port count, and any cooling delay before the next charge cycle can start.
Mower weight and deck performance vs. voltage marketing
A higher voltage number does not guarantee a better cut or an easier push. Deck design, wheel size, and overall mower weight affect maneuverability and cut quality as much as the battery platform does.
Replacement-pack and ecosystem cost
Check the price of a spare or replacement 40V battery for the specific brand before buying. Some ecosystems share packs across multiple tools, which can lower long-term cost, while others sell mower-only packs at a premium.
Best 40V Lawn Mowers
Greenworks 40V 16-Inch Push Mower
About this pick
Greenworks 40V 16-Inch Push Mower combines a 16-inch deck with a 40V 4.0Ah included battery, which works out to roughly 160Wh of nominal energy on a single pack. It carries a 4.2 rating from more than 12,100 reviewers, the largest review base of the 40V models we compared, which is a reasonable signal of consistent real-world performance across many yards.
The narrow deck and single included pack are the main tradeoffs on larger or overgrown lawns, where you will make more passes and may want a spare battery on hand. Compare its deck width, included watt-hours, and charging workflow against the size of your actual mowable area before buying.
Best for: small to mid-size lawns where a proven, widely reviewed 40V platform matters more than deck width
Check price on AmazonPros
- +16-inch deck
- +40V 4.0Ah battery included
- +Largest review base among 40V options here, at a 4.2 average
Cons
- −The narrow deck and single included pack limit productivity on larger or overgrown lawns.
- −Check storage space and local service access before buying.
MZK 40V 16-Inch 2-in-1 Brushless Cordless Push Mower
About this pick
MZK 40V 16-Inch 2-in-1 Brushless Cordless Push Mower pairs a 16-inch deck with a brushless motor and 2-in-1 mulch-or-bag capability on the 40V platform. It holds a 4.6 rating from a smaller pool of roughly 200 reviewers, which is a strong early signal but a much thinner sample than the category leader.
A brushless motor generally means less friction loss and a longer motor lifespan than brushed alternatives, but the smaller review base makes long-term durability harder to confirm. Compare its included watt-hours and charging time against your yard before treating the rating alone as proof of long-term reliability.
Best for: buyers who want a brushless motor and mulch-or-bag flexibility on a smaller lawn
Check price on AmazonPros
- +16-inch deck with brushless motor
- +2-in-1 mulching and bagging
- +4.6 rating, though from a smaller review sample
Cons
- −Review base is far smaller than the category leader, so long-term durability is less proven.
- −Check included watt-hours and charger specs before buying.
KOMASTY 40V 16-Inch Cordless 2-in-1 Mower
About this pick
KOMASTY 40V Electric Lawn Mower ships with two 40V 4.0Ah batteries and two chargers, so the included pack count is higher than most mowers at this price, along with 5-position height adjustment and a 10.6-gallon bag. It carries a 3.6 rating from about 180 reviewers, the lowest average of the models in this guide, so temper expectations against that price and rating.
Two included packs and two chargers can offset a smaller per-battery capacity by letting you swap mid-mow instead of waiting out a cooling delay, but that convenience does not offset the lower average rating. Compare real charging time and build quality against the models above before buying based on price alone.
Best for: buyers who want two included battery packs and chargers at a low upfront price
Check price on AmazonPros
- +Two 40V batteries and two chargers included
- +5-position height adjustment
- +Lowest price of the models in this guide
Cons
- −Lowest average rating (3.6) among the 40V mowers compared here.
- −Smaller review base makes long-term reliability harder to confirm.
13-Inch Cordless 40V Electric Lawn Mower
About this pick
This 13-Inch Cordless 40V Electric Lawn Mower has the narrowest deck of the models in this guide, aimed at small patio-adjacent yards or garden strips rather than a full-size lawn. It carries a 3.3 rating from only about 19 reviewers, by far the thinnest review base here, so treat the rating as an early signal rather than a settled track record.
The narrow deck means more passes on anything beyond a small area, and the limited review count leaves durability and included watt-hours largely unverified against buyer experience. Confirm included battery capacity and return policy directly on the listing before buying.
Best for: very small yards, patios, or garden strips where deck width matters less than compact storage
Check price on AmazonPros
- +13-inch deck fits tight storage spaces
- +Lowest weight class of the mowers compared here
- +Lower price point for occasional small-area use
Cons
- −Only about 19 reviews, the smallest sample in this guide, at a 3.3 average.
- −Narrow deck means significantly more passes on anything beyond a small area.
How We Evaluated These 40V Lawn Mowers
Each pick was assessed across 4 criteria weighted for real-world use.
Battery platform and included energy
We compared included pack count, amp-hours, and the resulting nominal watt-hours instead of ranking mowers on the 40V label alone.
Deck width and yard fit
We matched deck width and mower weight against the yard sizes each model is realistically suited for, from patio strips to standard suburban lots.
Charging and drive workflow
We considered charger count, drive type (push vs. self-propelled), and how charging or cooling delays could interrupt a mowing session.
Review volume and rating consistency
We weighed both the star rating and the number of reviews behind it, since a high rating from a handful of buyers carries less confidence than one backed by thousands of reviews.
How to Choose the Right 40V Lawn Mowers
Match the Property Before the Voltage Label
| Buyer situation | Recommended direction |
|---|---|
| Standard small to mid-size lawn, want proven reliability | Greenworks 40V 16-Inch Push Mower |
| Want a brushless motor and mulch-or-bag flexibility | MZK 40V 16-Inch 2-in-1 Brushless Cordless Push Mower |
| Want two included packs and chargers at a low price | KOMASTY 40V 16-Inch Cordless 2-in-1 Mower |
| Very small yard, patio, or garden strip | 13-Inch Cordless 40V Electric Lawn Mower |
Choose the Right 40V Setup
Single-pack push mower
Best for small to mid-size lawns where one included battery reliably covers a full mow without a mid-session swap.
Dual-pack mower
Best for larger or interrupted mowing sessions, since a second charged pack lets you swap instead of waiting out a cooling or charging delay.
Compact narrow-deck mower
Best for patios, garden strips, or very small yards where storage space and weight matter more than deck width or raw runtime.
40V Ownership Checklist
| Cost or task | Verify before buying |
|---|---|
| Battery energy | Actual watt-hours of the included pack(s), not just the 40V label |
| Spare packs | Price and availability of a replacement or second 40V battery for that brand |
| Charging | Charger wattage, port count, and any cooling delay after a hot session |
| Wear parts | Blade, height-adjustment mechanism, and bag availability for that model |
Review Confidence Checklist
High review volume
Ratings backed by thousands of reviews, like the Greenworks 40V 16-Inch, give more confidence in consistent real-world performance.
Low review volume
Newer or less-reviewed listings can still be good mowers, but treat the rating as an early signal and confirm return policy and included watt-hours directly on the listing.
Frequently Asked Questions
What should I check before buying a 40v lawn mowers?
Measure your mowable area, then compare each model's actual included watt-hours (volts times amp-hours), deck width, drive type, and the price of a replacement battery pack before comparing price alone.
Does a higher 40V amp-hour rating always mean longer runtime?
Generally yes for the same mower, since more amp-hours means more stored energy, but grass height, density, moisture, and drive load all affect how much of that stored energy is actually usable per mow.
Is a 40V mower as powerful as a 56V or 80V mower?
Not necessarily. Voltage alone does not determine cutting power or runtime. A 40V mower with a larger included pack can outlast a 56V or 80V mower shipped with a smaller battery, so compare watt-hours and deck width directly.
How many included batteries and chargers should I look for?
A single well-sized pack is fine for small to mid-size lawns. If your lawn is larger or you want to avoid mid-session charging delays, look for a model that ships with two batteries and two chargers.
How should I weigh a low review count against a high star rating?
A high rating from a small number of reviewers, like the 3.3-rated model with about 19 reviews in this guide, is a weaker signal than a similar or slightly lower rating backed by hundreds or thousands of reviews. Favor the larger sample when the ratings are close.
Bottom Line
best overall: Greenworks 40V 16-Inch Push Mower - best overall pick in this roundup.
See the full rankings above for all picks with pros, cons, and best-for summaries.
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