How accurate is the inclinometer?

Icutmetl · May 3, 2019

How accurate do you suppose the inclinometer is that’s found in our off-road screen? I noticed on a few occasions during my trip out west last year from Ohio to West Yellowstone that when going up grades, it would only read 4% or so when going up a 6% grade. On the way down, sometimes it wouldn’t budge below 0%, unless it was something more drastic.

Not a huge deal, but I have a feeling mine is 2-3% off. Has anybody else seen the same or similar?

redwngr · May 3, 2019

I could be wrong, but I think the truck inclinometer displays in degrees. Roads are posted in % grade.

(civil engineers and architects like to work with % grade)

https://www.archtoolbox.com/representation/geometry/slope.html

DEGREES	GRADIENT	PERCENT
0.6°	1 : 95.49	1.0%
1°	1 : 57.29	1.7%
1.15°	1 : 50	2%
1.19°	1 : 48	2.08%
2.86°	1 : 20	5%
4.76°	1 : 12	8.3%
7.13°	1 : 8	12.5%
10°	1 : 5.67	17.6%
14.04°	1 : 4	25%
15°	1 : 3.73	26.8%
26.57°	1 : 2	50%
30°	1 : 1.73	57.7%
45°	1 : 1	100%
56.31°	1: 0.67	150%
60°	1 : 0.6	173.2%
63.43°	1 : 0.5	200%
78.69°	1: 0.2	500%
89.43°	1 : 0.1	1000%
90°	1 : 0

... and I have not idea how accurate it is.

But 4 deg is about a 7% grade, according to this converter -

https://www.calcunation.com/calculator/degrees-to-percent.php

Edited May 3, 2019 by redwngr

Icutmetl · May 3, 2019

10 minutes ago, redwngr said:

I could be wrong, but I think the truck inclinometer displays in degrees. Roads are posted in % grade.

(civil engineers and architects like to work with % grade)

https://www.archtoolbox.com/representation/geometry/slope.html

DEGREES GRADIENT PERCENT

0.6° 1 : 95.49 1.0%

1° 1 : 57.29 1.7%

1.15° 1 : 50 2%

1.19° 1 : 48 2.08%

2.86° 1 : 20 5%

4.76° 1 : 12 8.3%

7.13° 1 : 8 12.5%

10° 1 : 5.67 17.6%

14.04° 1 : 4 25%

15° 1 : 3.73 26.8%

26.57° 1 : 2 50%

30° 1 : 1.73 57.7%

45° 1 : 1 100%

56.31° 1: 0.67 150%

60° 1 : 0.6 173.2%

63.43° 1 : 0.5 200%

78.69° 1: 0.2 500%

89.43° 1 : 0.1 1000%

90° 1 : 0

... and I have not idea how accurate it is.

But 4 deg is about a 7% grade, according to this converter -

https://www.calcunation.com/calculator/degrees-to-percent.php

Face palm on my part...

This is usually the stuff I notice immediately, too. Makes perfect sense and I’m sure you’re right and that is the case with the readout being in degrees. Duh....