JavaScript Sundial Calculator 
Enter the Latitude in degrees and minutes: degrees minutes
Click button to calculate:
This is the Latitude in radians: radians
These are the hourlines.
6 A.M. and 6 P.M. 6:30 A.M. and 5:30 P.M.
7 A.M. and 5 P.M. 7:30 A.M and 4:30 P.M.
8 A.M. and 4 P.M. 8:30 A.M. and 3:30 P.M
9 A.M. and 3 P.M. 9:30 A.M. and 2:30 P.M
10 A.M. and 2 P.M. 10:30 A.M. and 1:30 P.M
11 A.M. and 1 P.M. 11:30 A.M. and 12:30 P.M

Enter the latitude for the location at which the sundial is to be placed in service.
The calculator will provide the angles in degrees, measured from the southern point
of the gnomon, for the hour and half hour lines of the sundial.

Copyright 1999 H. W. LaBadie, Jr.