SLOPE COMPARISON

Ratio

Degrees Percentages
1:1 45 100%
1:1.5 34 66%
1:2 26 50%
1:2.5 21 40%
1:3 18 33%
1:3.5 15 28%
1:4 14 25%
1:4.5 12 22%
1:5 11 20%
1:5.5 10 18%
1:6 9 16%
1:6.5 9 15%
1:7 8 14%
1:7.5 8 13%
1:8 7 12%
1:8.5 7 11%
1:9 6 11%
1:10 6 10%
1:11 5 9%
1:12 5 8%
1:13 4 8%
1:14 4 7%
1:15 4 7%
1:16 4 6%
1:17 3 6%
1:18 3 5.5%
1:19 3 5%
1:20 3 5%

(Adapted from Planning for Bush Fire Protection 2006)