# How do you convert degree of rotation into mm?

###### October 09, 2008 3:37PM

Degrees of rotation does not convert directly to millimeters so the question in its current form has no answer. However, if the question is, "Given a known radius measured in millimeters and given a known angle in radians how do you find the length of the arc formed?" then the answer is:

s = rθ

Where

s = the length of the arc

r = the radius in question

θ = the known angle

Example