This might help. I realize it's not the direct answer to your question but
it's my best shot and a good start...

http://support.microsoft.com/kb/244951

maybe more useful....

http://www.cfa.harvard.edu/space_geo...e_convert.html




"lehigh46" wrote in message
...
Hi,

Does anyone have the formulas to convert PA Plane Coordinate System to
Latitude & Longitude.
I eventually want to make up a spread sheet that will convert many
points.

Thanks for your help.