Civil geometric design calculator helps to calculate degree of curvature from the radius. Degree of curvature may be defined in two ways. The arc definition is the angle subtended by a 100 ft arc. The chord definition is the angle subtended by a 100 ft chord.
Formula:
D = 36,000 / 2πR
where,R - radius of horizontal curves
π - 3.14285714286
D - degree of curvature