Slope Angle vs Percent slope

The program generally uses slope in percent, 100 * rise/run. When asked for a slope value, enter it in percent.

 

Angle (°) Slope(%)
1 1.7
2 3.5
3 5.2
4 7.0
5 8.7
6 10.5
7 12.3
8 14.1
9 15.8
10 17.6
15 26.8
20 36.4
25 46.6
30 57.7
35 70.0
40 83.9
45 100.0
50 119.2
60 173.2
70 274.7
                           
Slope (%) Angle (°)
1 0.57
2 1.15
5 2.86
10 5.71
15 8.53
20 11.31
25 14.04
30 16.70
35 19.29
40 21.80
45 24.23
50 26.57
60 30.96
70 34.99
80 38.66
90 41.99
100 45.00
125 51.34
150 56.31
200 63.43
250 68.20
300 71.57
Percent slope is the tangent of the slope angle (rise/run), multiplied by 100.

Last revision 5/28/2022