# Spiral curve deflection angle

Calculate the Spiral curve deflection angle with our free online tool using the input parameters: Length, Radius

Determine the deflection angle of the spiral or transition curve from the tangent to any point using the provided length and radius of the simple curve. By inputting the length and radius values into the calculation, you can accurately calculate the deflection angle of the curve from the tangent to your desired point.

The variables used in the formula are:

`i`

– Tangent deflection angle to any point on the curve

`L`

– Length of spiral from tangent to any point

`L`

– Length of spiral_{s}

`R`

– Radius of Simple Curve

The calculator uses the formula for calculating the deflection angle `i`

of the spiral or transition curve based on the given values of `L`

, `R`

, and `Ls`

.