I have about 14000 points with coordinates EPSG2438 and want to convert the coordinates into WGS84 (EPSG4326). I want to know that is there a way to make Excel formula to convert these coordinates. In QGIS (and I suppose in other GIS packages as well) when we want to change CRS, we can see certain information associated with each EPSG. For Example for EPSG4326
Extent: -180.00, -90.00, 180.00, 90.00 Proj4: +proj=longlat +datum=WGS84 +no_defs
and for EPSG2438
Extent: 121.50, 28.22, 124.50, 53.56 Proj4: +proj=tmerc +lat_0=0 +lon_0=123 +k=1 +x_0=500000 +y_0=0 +ellps=krass +towgs84=15.8,-154.4,-82.3,0,0,0,0 +units=m +no_defs
Can this associated information be used to convert from EPSG2438 to EPSG4326 and vice versa?