Transformation (conversion) of coordinates to another system
Coordinate conversions can be done with various software packages. The Hydrographic Service offers the free program PCTrans (standalone version and network version).
For transformations between ITRS, WGS84 and ETRS89, PCTrans uses the parameters from the file ‘Transformation parameters between ITRS, WGS84 and ETRS89’.
For conversions between LAT and WGS84, PCTrans uses the 2018 values. The values can be downloaded here.