Robot Mower Lawn Size Guide: Square Meters to Acres, Rated vs Real

Nearly every robot mower sold in the US was designed for Europe or China, where lawns are measured in square meters. The brands translate on their US pages, but the model numbers do not change. This page gives you the conversion table, explains why the rated area is not the same as daily coverage, lays out a headroom rule, and then lists specific models for every yard size from an eighth of an acre to three-plus, with the manufacturer’s rating and the October 2026 street price for each. Prices are fall sale prices and move often. For the broader picture, start at the robot mower hub.

Square meters to acres: the conversion table

One acre is 4,047 square meters, or 43,560 square feet. The model numbers you see on the box map like this:

Conversion: 1 acre = 4,046.86 m² (TheRobotsHQ uses the same 4,047 figure). Rounded to two decimals.

Some brands skip the square-meter number and rate directly in acres on US pages. Navimow’s X and H series, Husqvarna’s US lineup, Worx, Greenworks, Mova, Sunseeker and Roborock all do this. The number still means the same thing. It is the maximum lawn the mower is designed to maintain.

Rated area is not daily coverage

This is the part the box does not explain. A mower “rated for 1 acre” is not going to cut an acre tomorrow. It is going to cut a portion of it each day and get around the whole yard over several days, then start over. The rating assumes the mower runs most days, for most of the daylight hours, on a reasonably simple lawn.

TheRobotsHQ puts it plainly: “rated capacity is not daily coverage.” Their example is Navimow’s X450, which “carries a 1.5-acre rating but is quoted at roughly an acre of daily cutting” (TheRobotsHQ). Some brands now publish the daily figure directly. Lymow rates the One Plus at “1.1 acres/day” with the 5A charger and 1.73 acres per day with the 10A fast charger, and notes it covers 0.57 acre per battery charge (Lymow). Airseekers rates the Tron at 0.6 acre per 24 hours (Airseekers). Those per-day numbers are more honest than a bare area rating, and we wish everyone published them.

Four things eat into the rating:

1. Mowing time per day

The rating assumes the mower works long hours. If you restrict it to, say, 9 a.m. to 5 p.m. on weekdays because of noise or kids, you have cut its weekly capacity by a third or more. Vision-only mowers have this built in: eufy’s E15 mows only from half an hour after sunrise to half an hour before sunset and returns home in low light (eufy). Rain sensors pause most models too.

2. Battery and charge cycles

A mower that runs 90 minutes and charges for 90 minutes is mowing half the time it is “working.” The runtime and charge figures in our database range from 50-minute runtimes (Husqvarna 415X) to 240 minutes (Navimow X390). Bigger batteries are a large part of what you pay for when you step up a model number within the same family. The LUBA 3 AWD 1500, 3000 and 5000 share a chassis; the differences are battery (203, 259 and 324 Wh) and map allowance (Mammotion).

3. Obstacles and shape

Every tree, bed, swing set and birdbath is something the mower has to go around. Each go-around costs time. It also leaves a ring to clean up. Consumer Reports’ test lawn is about 2,100 square feet with flower beds, a fence, a patio, a narrow path and a tree, and CR notes that a flat rectangle is far easier for a robot than a yard with slopes, rocks, trees or walkways (Consumer Reports). Narrow passages between zones slow things further.

4. Slope

Climbing costs battery. The slope ratings in our database run from 30 percent (Navimow i-series, Worx wired) to 100 percent (Lymow One Plus, tracked). If your yard has a real hill, you want both a slope rating that clears it with margin and an area rating that assumes the mower will be working harder than on flat ground. We cover the terrain side in RTK vs LiDAR vs Vision.

The 20 to 30 percent headroom rule

Here is the sizing method we use for every recommendation on this site.

1. Measure the grass, not the lot. A quarter-acre suburban lot with a house, driveway, patio and beds usually has 5,000 to 7,000 square feet of actual turf, which is 0.12 to 0.16 acre. Use a satellite measuring tool or pace it off. Do not use the number on your property tax bill.
2. Add 20 percent if the yard is simple. Flat, few trees, one zone, you can let it run all day. A 0.4-acre lawn becomes a 0.48-acre job. Buy a “2000” (0.49 acre).
3. Add 30 percent if the yard is not simple. A slope, several trees, multiple zones, a narrow side yard, or you plan to limit mowing hours. The same 0.4-acre lawn becomes a 0.52-acre job. Buy a “2500” or “3000”, not a “2000”.
4. Check the maker’s “max” number too. Several brands publish a recommended area and a maximum. Mammotion’s US page for the LUBA 2 AWD 3000X says up to 0.9 acre max and 0.75 recommended; the LUBA mini AWD 1500 page says 0.37 acre with 0.44 max; the YUKA 1000 page says max 0.4 acre (Mammotion). The “max” is the ceiling on a perfect lawn. Size to the recommended figure.

Sizing table: models by yard size

Rated area is the manufacturer’s figure from our database. Street price is what the brand’s US store showed on October 17, 2026; many are fall sale prices and several models were sold out that week. “Headroom pick” means the rating is one step above the yard size, which is what the rule above recommends for yards with slope or obstacles. Full database method on How we evaluate.

1/8 acre (about 5,400 sq ft)

1/4 acre (about 10,900 sq ft)

1/2 acre (about 21,800 sq ft)

3/4 acre (about 32,700 sq ft)

1 acre (43,560 sq ft)

2 acres

Two acres is where residential robot mowers get thin. Only three models in our 94-row database clear 2.0 acres on the maker’s own rating, and two of the three were sold out in October 2026. The Lymow One Plus 10A falls short on paper but publishes a per-day figure the others do not; on a flat two acres it may keep up. We would not count on it with slope.

3 acres and up

There is no residential wire-free mower rated above 3 acres in the US market we can point to with verified specs. Your options:

• Mammotion LUBA 2 AWD 10000X. Rated 2.47 acres, “up to 3 acres max” on the US page, 60 to 100 zones. The ceiling of the consumer market, and sold out in October 2026 (Mammotion).
• Yarbo. A modular tracked platform that swaps between a mower deck, a snow blower and a leaf blower. Yarbo’s own blog puts a complete mower setup at roughly $4,000 to $4,500 and claims “up to 6 acres” with the Pro module (Yarbo). We have not verified the mowing specs against a spec sheet.
• Two mowers. Two 1.5-acre machines with two docks is a real strategy on a large lot, and often cheaper than one commercial unit.
• Commercial. Husqvarna CEORA, Navimow Terranox and Ambrogio are dealer-installed and priced accordingly.

Multi-zone yards and crossing driveways

Most American yards are not one lawn. They are a front yard, a back yard and a side strip, separated by a driveway, a walkway or a fence gate. Every wire-free mower in our database supports multiple zones. The count varies a lot. Navimow’s i-series allows 20, the H2 30, the X4 120; Mammotion’s LUBA 3 AWD 1500/3000/5000 allow 15/30/50; Dreame’s A3 AWD allows 150; Sunseeker’s X3 Plus allows 100. The zone count is in the “notes” column of our database for each model.

Three things to check before you buy for a split yard:

1. Can it cross hard surfaces on its own? RTK and LiDAR mowers can be given a “path” or “channel” across a driveway or walkway, and they will drive it with blades off. This works if the path is a mowable connection or a hard surface the mower can roll on. A closed gate or a flight of steps stops it. Vision-only mowers rely on seeing grass, so some cannot be told to drive across concrete; check the maker’s FAQ.
2. Does the second zone have navigation coverage? With a local RTK antenna, the back yard and the front yard both need a view of the sky and a line to the antenna. Mammotion’s installation guide says the reference station should go in a higher spot, such as a roof, when the lawn is O-shaped, U-shaped or in separate sections (Mammotion support). Network RTK models (Navimow NRTK, Worx RTK Cloud, Mammotion NetRTK) skip the antenna, but need cellular or Wi-Fi reach in both zones.
3. How many maps per dock? eufy’s E15 supports one map per base station (eufy). Mova’s Lidax Ultra 3000 AWD lists dual maps (Mova). If the two halves of your yard are truly disconnected, you may need to carry the mower between them, or buy a model that supports a second map.

If a zone is disconnected and shaded, the sizing math changes again. Shade is the top owner complaint about RTK mowers, and a back yard under oaks may need a LiDAR mower even if the front yard does not. We go through that in RTK vs LiDAR vs Vision and the RTK signal lost fixes page.

Sources

• TheRobotsHQ, Best Robot Lawn Mower for 1 Acre (m² conversion, rated vs daily coverage)
• Lymow One Plus
• Airseekers Tron
• eufy E15 product and FAQ page
• Mammotion LUBA 3 AWD
• Mammotion LUBA 2 AWD X
• Mammotion YUKA mini
• Consumer Reports, Best Robotic Lawn Mowers
• Anthbot M5
• Anthbot M5 LiDAR
• Anthbot M9
• Navimow US store
• Navimow i-series
• Navimow i215 LiDAR
• Navimow H2
• Navimow X3 series
• Navimow X4
• Ecovacs GOAT O1000 RTK
• Ecovacs GOAT A3000 LiDAR Pro
• Mova Lidax Ultra 1000
• Mova Lidax Ultra 2000
• Mova Lidax Ultra 3000 AWD
• Roborock RockNeo Q1
• Roborock RockMow X1
• Greenworks AiMowbot C20Z
• Greenworks AiMowbot C30Z
• Husqvarna Automower 410 iQ
• Husqvarna Automower 420 iQ
• Husqvarna Automower 440 iQ
• Dreame A3 AWD Pro
• Sunseeker X7 Gen 2
• Worx Landroid Vision Cloud WR340
• Yarbo, Robot lawn mower price breakdown
• Mammotion support, Best installation place for RTK Reference Station