There are 2pi radians in a full circle (360 degrees), so you can use these conversions:
if r is the number of radians, and d is the angle in degrees:
d = 360*r / (2pi) <<<< plug in your numbers here
To go from degrees to radians:
r = (2pi)*d / 360
If you wish, these can be simplified ever so slightly by dividing top and bottom by 2.