Slope class

Slope (%)

Slope (degree)

Terminology

1

0 - 0.5

0

Level

2

>0.5 - 2

0.3 - 1.1

Near level

3

>2 - 5

>1.1 - 3

Very gentle slopes

4

>5 - 10

>3 - 5

Gentle slopes

5

>10 - 15

>5 - 8.5

Moderate slopes

6

>15 - 30

>8.5 - 16.5

Strong slopes

7

>30 - 45

>16.5 - 24

Very strong slopes

8

>45 - 70

>24 - 35

Extreme slopes

9

>70 - 100

>35 - 45

Steep slopes

10

>100

>45

Very steep slopes