Robot mower slope checker

Makers rate slopes in percent, which is rise over run times 100. A 100% slope is 45 degrees, so the numbers look bigger than you expect.

Lay a straight board on the steepest part of your lawn, lift the low end until the board is level, and measure the gap. Enter both numbers below.

Your slope is 25% (14.0°).

81 of 98 mowers with a confirmed rating clear it with a 10-point margin.

  1. 1.Segway Navimow X450$2,9996,070 m²84%8.9/10
  2. 2.Segway Navimow X430$2,4994,047 m²84%8.8/10
  3. 3.Dreame A3 AWD Pro 3500$2,0003,500 m²80%8.7/10
  4. 4.Dreame A3 AWD Pro 5000$2,8005,000 m²80%8.7/10
  5. 5.Mammotion LUBA 3 AWD 5000$3,2995,000 m²80%8.6/10
  6. 6.Dreame A3 AWD 2000$1,7002,000 m²80%8.5/10
  7. 7.Dreame A3 AWD Pro 2500$1,7002,500 m²80%8.5/10
  8. 8.Lymow One Plus$2,7997,001 m²100%8.5/10

Questions people ask

How do I convert degrees to slope percent?

Take the tangent of the angle and multiply by 100. 20 degrees is about 36%, 30 degrees about 58%.

Why add a 10-point margin?

Slope ratings assume dry, firm grass. Wet grass and soft soil cut grip, and several makers quote a lower figure along the boundary edge.

What slope can most robot mowers handle?

Two-wheel-drive models typically stop between 30% and 45%. All-wheel-drive models carry the highest ratings in our catalog.

Can I use a phone to measure slope?

Yes. Inclinometer apps read degrees; convert to percent with the formula above or enter the board numbers here.