Spiral / Transition Curve Deflection Angle Calculator

Calculate the deflection angle of the spiral / transition curve from tangent to any point with the given length and the radius of simple curve.

Calculate the deflection angle of the spiral / transition curve from tangent to any point with the given length and the radius of simple curve.

Code to add this calci to your website

Just copy and paste the below code to your webpage where you want to display this calculator.

Formula Used:

i = L² / ( 6×R×L_s) Where, i - Tangent deflection angle to any point on the curve L - Length of spiral from tangent to any point L_s - Length of spiral R - Radius of Simple Curve

Spiral / transition curve deflection angle calculations are useful in constructions of roads to change the curvature and super elevation.