Robot Lawn Mower for 1 Acre, 2 Acres and Large Lawns: What Each Maker Rates Its Models For

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Last reviewed: November 2026. Specs and prices checked on each maker's US store on November 13, 2026. We have not tested these mowers: every figure below is what the maker states.

For a 1-acre lawn, choose a robot mower its maker rates for more than 1 acre, and check how the maker measures that rating, because brands measure it differently. Husqvarna, for example, rates its Automower 440 iQ at 2 acres but lists a separate capacity of 1 acre for an irregular lawn. Among models on sale on their makers' US stores in November 2026, the ones rated for 1 acre or more include the Husqvarna Automower 420 iQ and 435 iQ AWD, the Segway Navimow X330 and X350, three Worx Landroid Vision Cloud models, the Dreame A3 AWD Pro 5000 and the Sunseeker X7 Gen 2. For 2 acres and up, the Navimow X390 and Mammotion LUBA 2 AWD 10000HX are both rated at 2.5 acres.

Why area ratings are not comparable between brands

Every maker publishes a maximum lawn size, but not on the same basis:

• Husqvarna lists a "Lawn Size (±20%)" and two capacities: one for a systematic layout and one for an irregular lawn. For the Automower 440 iQ the systematic figure is 2 acres and the irregular one is 1 acre; for the 420 iQ, 1 acre and 0.5 acre.
• Lymow rates its One Plus in acres per day, and adds that "1.73 acres/day is a theoretical laboratory maximum."
• Sunseeker rates its X9 as "X9: 3 Acres / 48h," that is, over two days.
• Segway Navimow notes for its LiDAR models that "actual mappable area may vary depending on yard layout and complexity."

So a lawn full of beds, trees and narrow passages needs more rated capacity than an open rectangle of the same size. If a maker publishes a lower figure for complex lawns, as Husqvarna does, use that one.

Rated for about 1 to 1.5 acres

Mower	Maker's area rating	Max slope (maker)	Navigation	Price on maker's US store, Nov 13, 2026
Husqvarna Automower 420 iQ	1 acre (0.5 acre for an irregular lawn)	45%	Satellite RTK (EPOS), reference station included; virtual or physical wire	$3,299.99
Husqvarna Automower 435 iQ AWD	1.3 acres (0.9 acre irregular)	70%	Satellite RTK (EPOS), reference station included	$4,999.99
Segway Navimow X330	1.0 acre	27°	RTK plus camera vision; antenna included	$2,299
Segway Navimow X350	1.5 acres	27°	RTK plus camera vision; antenna included	$2,799
Worx Landroid Vision Cloud (WR340)	1 acre	30% (17°), in the manual	RTK corrections from Worx's cloud, no home antenna	$2,299.99
Worx Landroid Vision Cloud 4WD (WR344)	1 acre	84% (40°)	RTK from Worx's cloud	$2,999.99
Worx Landroid Vision Cloud 4WD (WR346)	1½ acres	84% (40°)	RTK from Worx's cloud	$3,699.99
Dreame A3 AWD Pro 5000	1.20 acres	80% (38.7°)	LiDAR plus camera vision, no RTK, no wire	$2,999.99 (on sale)
Sunseeker X7 Gen 2	Up to 1.5 acres	70% (35°)	Network RTK plus vision, no local base station	$2,499
Lymow One Plus 5A	1.1 acres per day (not comparable with the others)	100% (45°)	RTK plus vision; reference station included	$2,399

Out of stock on the maker's store on November 13: the Navimow X430 (1.0 acre) and X450 (1.5 acres), and Mammotion's LUBA 2 AWD 5000HX and LUBA 3 AWD 5000 (1.25 acres each). Greenworks lists its AiMowbot G40AWD at 1 acre but showed no price on its store.

Worx's manuals add a caveat to its slope ratings: "If the mower is equipped with the Cut to Zero module, it is not recommended to operate the mower on slopes greater than 15°." The manuals list that module as fitted to the three Worx models above. See Worx Landroid models compared.

→ Husqvarna 420 iQ · Navimow X350 · Worx Landroid Vision Cloud 1 acre · Dreame A3 AWD Pro 5000

Rated for 2 acres or more

Mower	Maker's area rating	Max slope (maker)	Navigation	Price on maker's US store, Nov 13, 2026
Segway Navimow X390	2.5 acres	27°	RTK plus camera vision	$4,499
Mammotion LUBA 2 AWD 10000HX	2.5 acres	80% (38.6°)	RTK plus vision; reference station included	$4,499
Sunseeker X9	3 acres per 48 hours (X9 Plus: 6 acres per 48 hours)	90% (42°)	Sunseeker's AONavi, no antenna station	$5,899 (X9 Plus $6,999)
Lymow One Plus 10A	1.73 acres per day, a "theoretical laboratory maximum"	100% (45°)	RTK plus vision; reference station included	$2,499

Husqvarna's Automower 440 iQ (2 acres systematic, 1 acre irregular, $4,299.99) was out of stock on Husqvarna's store. Greenworks lists AiMowbot models for 2 acres (G80AWDX) and 3 acres (G120AWDX) without a price.

→ Navimow X390 · Mammotion LUBA 2 AWD 10000HX

Smaller lawns: about half an acre

If your lawn is closer to half an acre, makers rate these models for it: the Navimow H220 (0.5 acre, $2,199), Worx Landroid Vision Cloud WR320.1 (1/2 acre, $1,799.99), Dreame A3 AWD 2000 (0.50 acre, $1,699.99 on sale) and Sunseeker X5 Gen 2 (0.5 acre, $1,999). Husqvarna's Automower 410 iQ is rated at 0.5 acre, or 0.25 acre for an irregular lawn, and was out of stock.

Slope matters as much as size

Makers state the steepest slope a mower handles, as a percentage, in degrees, or both. A 45% slope rises 45 feet over 100 feet of run, about 24°; Navimow, for example, writes "45% (24°)." Ratings in this guide range from 27° on the Navimow X3 series to 100% (45°) on the tracked Lymow One Plus. Husqvarna also gives a lower figure for slopes at the edge of the lawn: its 420 iQ handles 45% inside the lawn but 15% at the boundary.

How the mower finds its way

Most mowers rated for an acre or more navigate by satellite RTK, often with cameras, rather than a buried wire. Husqvarna describes its system as "a satellite navigation technique that provides centimeter-level accuracy in seconds," and says its wire-free option suits "large, open yards with clear sight of the sky." Dreame's A3 AWD Pro uses LiDAR and cameras instead, with "No RTK. No Wires." Which approach suits your yard depends mostly on trees and buildings: see robot lawn mowers without a perimeter wire.

How to size a robot mower for your lawn

1. Measure the area you mow, not your lot. One acre is 43,560 square feet.
2. Add for complexity. If the maker gives a figure for irregular lawns, use it; otherwise leave headroom for beds, trees and narrow passages.
3. Check the slope of the steepest part, and the boundary slope if the maker lists one.
4. Check the navigation needs: open sky for RTK models, internet coverage for cloud or network RTK, and what the maker says about shade.
5. Compare like with like. Acres per day or per 48 hours are not the same as a maximum lawn size.

For prices at every lawn size, see how much a robot lawn mower costs. For model-by-model detail, see Husqvarna Automower models compared.

FAQ

Can a robot mower handle 1 acre?

Yes. Several makers rate models for 1 acre or more, including Husqvarna, Segway Navimow, Worx, Dreame, Sunseeker and Mammotion. Check whether the rating assumes a simple or an irregular lawn.

What is the best robot lawn mower for 2 acres?

That depends on your slope and tree cover. By maker rating, the Navimow X390 and Mammotion LUBA 2 AWD 10000HX are rated for 2.5 acres, and Sunseeker rates its X9 for 3 acres over 48 hours. Husqvarna's 440 iQ is rated for 2 acres on a systematic lawn and 1 acre on an irregular one.

Do robot mowers for large lawns need a boundary wire?

Most of the large-lawn models here do not: they use satellite RTK, cameras or LiDAR. Some still offer a wire; Husqvarna's 420 iQ lists both "Physical wire, Virtual wire" as boundary types.

Sources

Husqvarna: Automower 410 iQ, 420 iQ, 440 iQ, 435 iQ AWD and EPOS. Segway Navimow: X330, X350, X390, H2 series and i2 LiDAR. Worx: Landroid Vision Cloud 1 acre, 1/2 acre, 4WD 1 acre and 4WD 1½ acres, and the owner's manuals for the WR340 and WR344/WR346. Dreame: A3 AWD Pro and A3 AWD. Sunseeker: X7 Gen 2, X9 and X5 Gen 2. Mammotion: LUBA 2 AWD. Lymow: One Plus.

Sources last checked November 13, 2026.

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