AllTrans can be used for world wide professional coordinate transformations between international and national coordinate systems with or without geodetic datum change. Transformations between State-Plane-Coordinates (NAD83, NAD27, Transverse Mercator, Lambert, Soldner-Cassini, Mercator, EOV, Krovak, LV95, Pulkovo-Gauss-Krueger, Gauss-Boaga,...), UTM-Coordinates, Geographical- and 3d-Cartesian-Coordinates. Manual input and File-Import/Export (ASCII, NMEA-GGA). If the geodetic datum of Start- and Targetsystem is not identical there is a datum shift possible (3-Parameter-Molodenski, 7-Parameter-Bursa-Wolf or Grid-Shift NTv2). Interfaces to GoogleEarth and GoogleMaps. AllTrans is available in English/German and there is also an Online-Help available. For all countries there are predefined datum shifts to WGS84. For higher accuracies it is possible to calculate individual parameters using identical points. These parameters then can be stored to the database in AllTrans. The calculation can be done with a Standard-L2-Adjustment or otherwise using an adjustment with reweighting. There is also an outlier test implemented. With the Geoid-Modul (e.g. EGM2008, GEOID09) the user can calculate orthometric heights from GPS-heights.