Plane angles have been measured in many different units. The most contemporary units are the degree ( ° ) and radian (rad), but many others have been used throughout history.
The radian (rad) is the SI unit for measuring angles. one radian is just under 57.3 degrees. Accepted prefixes still not accepted in pure math.
Centesimal second of arc is as one ten-thousandths of a gradian (1 grad/10000). In SI units this is 2π/4000000 radians or approximately 1.570 796 x 10-6 rad.
Divide the centesimal second of arc value by 636619.904813
radian = centesimal second of arc / 636619.904813
Multiply the radian value by 636619.904813
centesimal second of arc = radian x 636619.904813
One radian (rad) is equal to 636619.904813 centesimal second of arc (")
1 radian (rad) = 636619.904813 centesimal second of arc (")
One centesimal second of arc (") is equal to 0.000002 radian (rad)
1 centesimal second of arc (") = 0.000002 radian (rad)