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

Kress

Mission KR236 RTKn

Rated for 6 acres and 40% grade — that is 21.8°, not 40°. On a real lawn, once you allow for borders and travel paths, plan on about 4.8 acres.

Rated area6 acres
Max grade40% · 21.8°
Drive2WD
NavigationRTKn cellular network
Sold viaDealers

What it handles

Two-wheel drive, which caps how steep it can work. That is a flat-to-gently-rolling rating — a real slope will stall it.

Navigation is satellite-based without vision or LiDAR, so heavy tree cover is a real risk — it loses its fix under canopy. It also needs the maker's own RTK network to reach your address; check coverage before buying.

If your ground is steeper

These are rated for a similar area but hold more grade than the Mission KR236 RTKn’s 40%.

YARBO Robot Lawn Mower Pro6 ac · 70% · Tracked

Cross-shopped with

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

Kress Mission KR236S RTKn6 ac · 40% · 2WD
Kress Mission KR237 RTKn7 ac · 40% · 2WD

Kress Mission KR236 RTKn — straight answers

What slope can the Mission KR236 RTKn handle?
40% grade, which is 21.8° — not 40°. Percent and degrees are different scales and cross only at 100% = 45°.
How much lawn can the Mission KR236 RTKn cut?
Rated for 6 acres. After the coverage buffer real lawns need, plan on about 4.8 acres of actual mowing.
What handles steeper ground than the Mission KR236 RTKn?
YARBO Robot Lawn Mower Pro at 70% (35°).

How confident we are

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

Rated 6.0 ac on a 48h cycle, up to 9.0 ac on 72h. 40% grade (21.8 deg) across the whole Kress line. Estate scale. Needs Kress RTKn network coverage at your address — check before buying. Dealer-sold.

Match your own acreage and grade → · Why 40% is not 40° →