Robot mowers for a 3/4 acre lawn: which fit and why

Results for buyers in the US

The lawn behind this page

Your lawn: 0.75 acres3,040 m²
Shape: typical, × 1.35
Mowing hours: any time, × 1.0
Rating it needs: 1.01 acres4,100 m²
Steepest slope: 15% (8.5°)a clear pass needs a rating of 20% or more

Change these numbers in the sizer, or read how the shape and hours factors work in the methodology. They are rules of thumb.

Of the 33 mowers sold in the US: 10 fit, 4 are tight and 19 do not fit.

Closest fitSegway Navimow X330Limit 1.2 acres

Lowest price that fits$2,299Segway Navimow X330, as of October 2026

Closest fit first: the smallest limit that still covers the rating your lawn needs, then the lower price, then the larger slope margin.

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Fits10

The limit covers the rating your lawn needs, and nothing rules the model out.

Segway Navimow

X330

Fits

No wire, needs an antenna at home

AreaFitsRecommended for 1 acre; the sizer allows 1.2 times that: 1.2 acresYour 0.75 acres is 62% of the 1.2 acres the sizer allows. Needs 1.01 acres with the margin: 0.19 acres to spare.

SlopeClearRated for 50% (26.6°), 35 points above your 15% (8.5°).

Needs an antenna at home and open sky over the lawn.

$2,299 price on the maker's page as of October 2026Specs and sources Segway Navimow page

Segway Navimow

X430

Fits

No wire, no antenna at home

AreaFitsRecommended for 1 acre; the sizer allows 1.2 times that: 1.2 acresYour 0.75 acres is 62% of the 1.2 acres the sizer allows. Needs 1.01 acres with the margin: 0.19 acres to spare.

SlopeClearRated for 84% (40°), 69 points above your 15% (8.5°).

Needs no antenna at home and open sky over the lawn.

$2,499 price on the maker's page as of October 2026Specs and sources Segway Navimow page

Roborock

RockMow X130H

Fits

No wire, satellite positioning

AreaFitsRecommended for 1 acre; the sizer allows 1.2 times that: 1.2 acresYour 0.75 acres is 62% of the 1.2 acres the sizer allows. Needs 1.01 acres with the margin: 0.19 acres to spare.

SlopeClearRated for 80% (38.7°), 65 points above your 15% (8.5°).

Needs antenna: not stated and open sky over the lawn.

$2,499 price on the maker's page as of October 2026Specs and sources Roborock page

MAMMOTION

LUBA 3 AWD 5000H

Fits

No wire, no antenna at home

AreaFitsRated for up to 1.24 acresYour 0.75 acres is 61% of its 1.24 acres rating. Needs 1.01 acres with the margin: 0.22 acres to spare.

SlopeClearRated for 80% (38.7°), 65 points above your 15% (8.5°).

$3,299 price on the maker's page as of October 2026Specs and sources MAMMOTION page

Husqvarna

Automower 435 iQ AWD

Fits

No wire, satellite positioning

AreaFitsRated for up to 1.3 acresYour 0.75 acres is 58% of its 1.3 acres rating. Needs 1.01 acres with the margin: 0.29 acres to spare.

SlopeClearRated for 70% (35°), 55 points above your 15% (8.5°).

Needs antenna: not stated and open sky over the lawn.

$4,999.99 price on the maker's page as of October 2026Specs and sources Husqvarna page

Tight4

The limit covers your lawn but not the margin, or the slope is at its limit.

Husqvarna

Automower 420 iQ

Tight

No wire, satellite positioning

AreaTightRated for up to 1 acreYour 0.75 acres is 75% of its 1 acre rating. Covers your lawn but not the margin: 0.01 acres short of the 1.01 acres it needs.

SlopeClearRated for 45% (24.2°), 30 points above your 15% (8.5°).

Needs antenna: not stated and open sky over the lawn.

$3,299.99 price on the maker's page as of October 2026Specs and sources Husqvarna page

Husqvarna

Automower 435X AWD

Tight

Boundary wire

AreaTightRated for up to 0.9 acresYour 0.75 acres is 83% of its 0.9 acres rating. Covers your lawn but not the margin: 0.11 acres short of the 1.01 acres it needs.

SlopeClearRated for 70% (35°), 55 points above your 15% (8.5°).

Needs a boundary wire laid around the lawn.

$2,999.99 price on the maker's page as of October 2026Specs and sources Husqvarna page

Dreame

A3 AWD Pro 3500

Tight

No wire, LiDAR and camera

AreaTightRated for up to 0.86 acresYour 0.75 acres is 87% of its 0.86 acres rating. Covers your lawn but not the margin: 0.15 acres short of the 1.01 acres it needs.

SlopeClearRated for 80% (38.7°), 65 points above your 15% (8.5°).

$1,999.99 price on the maker's page as of October 2026Specs and sources Dreame page

Sunseeker

X7

Tight

No wire, needs an antenna at home

AreaTightRated for up to 0.75 acresYour 0.75 acres is 100% of its 0.75 acres rating. Covers your lawn but not the margin: 0.26 acres short of the 1.01 acres it needs.

SlopeClearRated for 70% (35°), 55 points above your 15% (8.5°).

Needs an antenna at home and open sky over the lawn.

$2,699.99 price on the maker's page as of October 2026Specs and sources Sunseeker page

Does not fit19

Each line gives the reason in numbers.

ECOVACS GOAT A3000 LiDAR PRO: its 0.74 acres limit is 0.01 acres short of your 0.75 acres lawn.
MAMMOTION LUBA 3 AWD 3000H: its 0.74 acres limit is 0.01 acres short of your 0.75 acres lawn.
Roborock RockMow X120H LiDAR: the 0.59 acres the sizer allows is 0.16 acres short of your 0.75 acres lawn.
Husqvarna Automower 410 iQ: its 0.5 acres limit is 0.25 acres short of your 0.75 acres lawn.
MOVA LiDAX Ultra 2000: its 0.49 acres limit is 0.26 acres short of your 0.75 acres lawn.
ECOVACS GOAT A2000 LiDAR PRO: its 0.49 acres limit is 0.26 acres short of your 0.75 acres lawn.
Roborock RockMow X115H: the 0.44 acres the sizer allows is 0.31 acres short of your 0.75 acres lawn.
ANTHBOT N8: the 0.44 acres the sizer allows is 0.31 acres short of your 0.75 acres lawn.
Segway Navimow i215 LiDAR: the 0.44 acres the sizer allows is 0.31 acres short of your 0.75 acres lawn.
MAMMOTION LUBA mini 2 AWD 1500: its 0.37 acres limit is 0.38 acres short of your 0.75 acres lawn.
MAMMOTION LUBA 3 AWD 1500: its 0.37 acres limit is 0.38 acres short of your 0.75 acres lawn.
Segway Navimow i210 AWD: the 0.3 acres the sizer allows is 0.45 acres short of your 0.75 acres lawn.
ANTHBOT M9: the 0.3 acres the sizer allows is 0.45 acres short of your 0.75 acres lawn.
ECOVACS GOAT O1000 RTK: its 0.25 acres limit is 0.5 acres short of your 0.75 acres lawn.
ECOVACS GOAT O1000 LiDAR PRO: its 0.25 acres limit is 0.5 acres short of your 0.75 acres lawn.
MAMMOTION YUKA mini 2 1000H: its 0.25 acres limit is 0.5 acres short of your 0.75 acres lawn.
eufy Robot Lawn Mower E15: its 0.2 acres limit is 0.55 acres short of your 0.75 acres lawn.
Segway Navimow i206 AWD: the 0.18 acres the sizer allows is 0.57 acres short of your 0.75 acres lawn.
Segway Navimow i105: the 0.15 acres the sizer allows is 0.6 acres short of your 0.75 acres lawn.

This page ranks the 33 mowers in the Botsize dataset that are sold in the US. Prices are the maker's list price, or the price its page showed that month (sometimes a sale price), with the month we read it.

To work out your own lawn size, the lawn area calculator adds up the shapes of your garden.

Sizing for three quarters of an acre

Three quarters of an acre is 32,670 sq ft (3,035 m²). For this lawn that means 39,204 sq ft (3,642 m²) on one open shape, 44,105 sq ft (4,097 m²) with some beds and trees, and 49,005 sq ft (4,553 m²) for a complex layout. A mower allowed to run in daytime only needs 1.5 times as much again: 66,157 sq ft (6,146 m²) for a typical shape.

Above half an acre the choice narrows, and the tight group carries real candidates: models that cover the lawn but not the full margin. A tight model may suit an open lawn with long mowing hours. On a lawn with many beds or a daytime only schedule, pick from the fits group or plan to mow some areas by hand.

Read the basis next to each rating. Some makers publish a recommended size and the sizer allows 1.2 times it, others a maximum, and a few a figure per day or per week. The area ratings guide explains each one, and the model page states which basis applies.

Questions about three quarter acre lawns

What rating does three quarters of an acre need?

About 44,105 sq ft (4,097 m²) for a typical shape mowed at any time, which is just over one acre.

Is a tight model a bad choice?

Not always. It covers your lawn but not the margin for shape and hours. On an open lawn with no time limits it can be enough. On a complex lawn, choose a model that fits.