Per Acre GuideGrade in percent · Area in acres · US models

ANTHBOT

M9

Rated for 0.25 acres and 45% grade — that is 24.2°, not 45°. On a real lawn, once you allow for borders and travel paths, plan on about 0.2 acres.

Rated area0.25 acres
Max grade45% · 24.2°
Drive2WD
NavigationDual vision + full-band RTK
Sold viaOnline retail

What it handles

Two-wheel drive, which caps how steep it can work. That covers rolling ground, but not a bank you would struggle to walk up.

Navigation includes vision or LiDAR, so it keeps working under tree cover where satellite-only machines lose their fix.

Below a quarter acre once the coverage buffer is applied — too small for any of our acreage bands.

If your ground is steeper

These are rated for a similar area but hold more grade than the M9’s 45%.

Mammotion LUBA 3 AWD 15000.37 ac · 80% · AWD
Mammotion LUBA mini 20.25 ac · 80% · AWD
Mammotion LUBA mini AWD 800H0.2 ac · 80% · AWD

Cross-shopped with

Rated for a similar area, at the same grade or less.

ECOVACS GOAT O1000 LiDAR Pro0.25 ac · 45% · 2WD

ANTHBOT M9 — straight answers

What slope can the M9 handle?
45% grade, which is 24.2° — not 45°. Percent and degrees are different scales and cross only at 100% = 45°.
How much lawn can the M9 cut?
Rated for 0.25 acres. After the coverage buffer real lawns need, plan on about 0.2 acres of actual mowing.
What handles steeper ground than the M9?
Mammotion LUBA 3 AWD 1500 at 80% (38.7°); Mammotion LUBA mini 2 at 80% (38.7°); Mammotion LUBA mini AWD 800H at 80% (38.7°).

How confident we are

Cross-checked against the manufacturer and at least one other source.

Confirmed 45% and 1000 sq m (0.25 acre) on anthbot.com. Conflict to watch: some Amazon listings and the manual intro say 0.3 acre, a figure ANTHBOT publishes nowhere on its own site. The manual spec table has no working-area row, so no source here is fully authoritative.

Match your own acreage and grade → · Why 45% is not 45° →