In Fortran, you can convert an angle from radians to degrees by multiplying the angle by the constant 180.0 / pi.
Example
program radians_to_degrees_example
real :: radians, degrees
real, parameter :: pi = 3.14159
radians = 1.57
degrees = radians * (180.0 / pi)
write(*,*) "The angle in degrees is", degrees
end program radians_to_degrees_example
Output
The angle in degrees is 89.9544525