Just in case you are trying to fathom out some markings on a plan somewhere….
The Formula is as follows…… degree of slope X 1.746 cm X 1 Metre of run equals rise in centimetres ( or negative FALL)
e.g. (DDO8) 2.5 degrees over an 8 meter span = 2.5 X 1.746 cm X 8 metres = 34.92 Cm per meter, or 0.3492 m rise, over a meter sideways.
The gradient (also known as slope) of a line is defined as: gradient = vertical rise / horizontal run
Say a 2 meter rise, over an 8 meter run is 2/8 = 1/4 = .25m or could be referred to as “1 in 4.”