The TatukGIS Coordinate Calculator interactively converts coordinates of a point between coordinate systems. Approximately 4,800 geographic and projected coordinate systems are pre-defined and simply selected from the list. Any coordinate system can also be user defined from 150+ supported projections and 900+ supported datums. Like in other TatukGIS products, the coordinate system support is state-of-the-art, reflecting EPSG codes and OpenGIS WKT definitions.
The Coordinate Calculator for Windows is available as a free download from the TatukGIS web site. The Coordinate Calculator for macOS can be purchased for a small fee from the Apple Mac App Store.
Calculator running on Mac OSX 10.8.
Calculator running on Windows 8.
For batch conversion of large x,y coordinate datasets (for many points) between coordinate systems in a single operation, refer to the CSConverter script in the TatukGIS Editor product. CSConverter is one of many useful scripts packaged with the Editor.