Which robot mower for about 1 acre?
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If your acre is one open zone, you'd want a model rated at least 1 acre. If you've got heavy trees, or more than one zone, you'd want a rating of at least 1.25 acres. how we size. The X430, the WR340, and the WR344 are rated 1.0 acre, so they cover an open lawn and miss a tree or two-zone lawn.
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Open acre if your banks are gentler
Worx Landroid Vision Cloud WR340
See Worx Landroid Vision Cloud WR340 on Amazon1.5 acres, with no confirmed listing
There's no Amazon link for this model yet because we couldn't confirm a current amazon.com listing for this exact version.
Rated area with trees or two zones
If your lawn has heavy trees or two zones, the Rated ÷ 1.25 column is the figure we'd plan on. how we size.
Swipe sideways to read every column.
| Model | Rated | Rated ÷ 1.25 | Open acre | 1 acre with trees or two zones | Slope |
|---|---|---|---|---|---|
| Navimow i210 AWD | 0.25 acres (10,890 sq ft) | 0.2 acres (8,712 sq ft) | No | No | 45% (24°)It sits under an acre, so we'd look past it for a full acre of grass. |
| Dreame A3 AWD Pro 2500 | 0.62 acres (27,007 sq ft) | 0.5 acres (21,780 sq ft) | No | No | 80% (38.7°)It sits under an acre, so we'd look past it for a full acre of grass. |
| LUBA 3 AWD 3000 | 0.75 acres (32,670 sq ft) | 0.6 acres (26,136 sq ft) | No | No | 80% (38.6°)Under an acre. LiDAR is why we'd still read it if your smaller lawn is under trees. |
| Worx WR340 | 1 acre (43,560 sq ft) | 0.8 acres (34,848 sq ft) | Yes | No | 30% (17°)It covers an open acre. It's not enough if you've got trees or two zones. Wirecutter's complex-lawn note is a separate caution. |
| Worx WR344 | 1 acre (43,560 sq ft) | 0.8 acres (34,848 sq ft) | Yes | No | 84% (40°)Same 1 acre rating, with the 4WD slope. It's not enough if you've got trees or two zones. |
| Navimow X430 | 1 acre (43,560 sq ft) | 0.8 acres (34,848 sq ft) | Yes | No | 84% (40°)It covers an open acre. It's not enough if you've got trees or two zones. |
| Automower 420 iQ | 1 acre (43,560 sq ft) | 0.8 acres (34,848 sq ft) | Yes | No | 45% (degrees not published). 15% at boundary0.5 acre irregular / 1 acre systematic |
| A3 AWD Pro 5000 | 1.2 acres (52,272 sq ft) | 0.96 acres (41,818 sq ft) | Yes | No | Not publishedDreame doesn't publish a slope figure for the 5000, so we wouldn't guess one. |
| LUBA 3 AWD 5000 | 1.25 acres (54,450 sq ft) | 1 acre (43,560 sq ft) | Yes | Yes | 80% (degrees not published)Rated area meets 1.25 acres. Degrees aren't published for it. |
| Automower 435 iQ AWD | 1.3 acres (56,628 sq ft) | 1.04 acres (45,302 sq ft) | Yes | Yes | 70% (degrees not published). 50% at boundaryRated above 1.25 acres. There's no confirmed amazon.com listing. |
| Navimow X450 | 1.5 acres (65,340 sq ft) | 1.2 acres (52,272 sq ft) | Yes | Yes | 84% (40°)A map maximum of 1.8 acres is stated for the X450 only. There's no confirmed amazon.com listing. |
| Automower 440 iQ | 2 acres (87,120 sq ft) | 1.6 acres (69,696 sq ft) | Yes | Yes | 45% (degrees not published). 15% at boundaryIt's the largest rating in the list. There's no confirmed amazon.com listing. |
Makers usually publish one maximum slope and don't say whether it applies in the middle of your lawn or at the edge. When a model also gives a lower figure for the edge, that's the one to use there. If your bank runs into a bed or a fence, we'd leave some margin, because edges are usually harder.
What the 1.0 acre ratings leave out
Wirecutter, updated Aug 3, 2026, suggests a complex lawn closer to a quarter acre than the WR340's 1 acre rating. That's Wirecutter's note. We wouldn't call the WR340 an award winner.
Wirecutter, The Best Robot Lawn Mowers (updated Aug 3, 2026); Landroid Vision Cloud 1 Acre (WR340 page; series specs), Worx US, checked Oct 10, 2026.
The LUBA 3 AWD 3000 is rated 0.75 acres (32,670 sq ft). It doesn't cover a full acre. It's still the one we'd compare when trees cover a smaller lawn, because it adds LiDAR. The Dreame 2500 is rated 0.62 acres. The i210 is rated 0.25 acres.
The 420 iQ area note says 0.5 acre for an irregular lawn and 1 acre for systematic mowing. We'd use Husqvarna's figure for this model rather than how we size. Husqvarna puts 15% at the boundary beside the higher slope figure, so that higher figure is the interior and 15% is the boundary.
Automower 420 iQ, Husqvarna US, checked Oct 10, 2026.
The X450, the LUBA 5000, the Dreame 5000, and the Husqvarna iQ models above don't have a confirmed amazon.com listing, except where a button appears in the quick pick. The X450 in that box has no button for that reason.