Co-ordinate Converter
Ireland

Geodetic Co-ordinates
WGS84/ETRS89
Used as reference for GPS and
online maps of Ireland
GPS-compatible
Degrees
Lat N
Lon W
 OS Ireland 65
Used as graticule markings
on OS maps of Ireland
Not GPS-compatible
Degrees
Lat N
Lon W
 ED50 (European Datum)
Used as graticule markings on
some UTM maps of Ireland
Not GPS-compatible
Degrees
Lat N
Lon W
Irish Transverse Mercator Grid
Co-ordinates
Currently being introduced to Irish mapping, eventually to replace the Irish Grid.
Eastings m
Northings m
Irish Grid
Used on OS maps of Ireland since the 1960s.
Grid Reference
Sq.EastingsNorthings
e.g.  N  428  136
Full Co-ordinates
Eastings m
Northings m
UTM (Universal Transverse Mercator) Co-ordinates
WGS84/ETRS89 datum
Used as international grid referencing for Ireland
UTM Zone N hemis.
Eastings m
Northings m
ED50 datum (International 1924 ellipsoid)
Used on some international maps of Ireland
UTM Zone N hemis.
Eastings m
Northings m
Bonne Projection (Ireland)
Co-ordinates
Used as the basis for OS small-scale maps of Ireland from the 1850s to the 1990s.
 ft  of origin
 ft 
War Office Irish Grid
Used on War Office maps of Ireland from the 1920s to the 1950s.
Grid Reference
Sq.EastingsNorthings
e.g.  iN  428  136
Full Co-ordinates
Eastings m
Northings m
OSi/OSNI Polynomial enabled

Page last updated: 4 May 2009
Build Version: 1.2.003