| There are two common ways to measure the slope of a surface: degrees and percentage.
The simplest way is to measure the slope in percentage using the formula given in Figure 1, while:
L – is the length of the slope
H – is the height difference
After calculating the slope in percentage, use the table below to convert the slope in percentage to degrees |  | Figure 1
Calculate the slope in percentages (%) | | | Slope (%) | Slope
(degrees) | | Slope (%) | Slope
(degrees) | | Slope (%) | Slope
(degrees) | | 1.8 | 1° | | 14 | 8° | | 26.8 | 15° | | 3.5 | 2° | | 15.8 | 9° | | 28.7 | 16° | | 5.2 | 3° | | 17.6 | 10° | | 30.6 | 17° | | 7.0 | 4° | | 19.4 | 11° | | 32.5 | 18° | | 8.8 | 5° | | 21.2 | 12° | | 34.4 | 19° | | 10.5 | 6° | | 23.1 | 13° | | 36.4 | 20° | | 12.3 | 7° | | 24.0 | 14° | | 38.4 | 21° | Conversion table of slope in percentage to slope in degrees
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