WGS 84 → Irish Transverse Mercator

Latitude and longitude to Irish Transverse Mercator converter

Convert WGS 84 latitude and longitude to Irish Transverse Mercator eastings and northings, with coverage, datum and coordinate-order notes.

Batch coordinate converter

Enter one WGS 84 coordinate per line as latitude, longitude.

Input example: 53.5, -8

0 of 100 coordinates

Output example: 600000, 750000

Numeric coordinates are rounded for display: decimal latitude/longitude to up to 6 decimal places, metre-based coordinates to up to 3, DMS seconds to up to 2, and DDM minutes to up to 4.

About this conversion

Convert WGS 84 latitude and longitude to Irish Transverse Mercator (EPSG:2157) eastings and northings for the island of Ireland.

Frequently asked questions

What input is accepted?

By default, enter WGS 84 latitude first and longitude second in decimal degrees. Select Reverse coordinate order to enter longitude first. Latitude must be from −90 to 90 and longitude from −180 to 180.

What output will I receive?

The result is an EPSG:2157 easting and northing pair in metres.

Which axes and units are used?

WGS 84 input defaults to latitude then longitude in degrees. ITM output uses easting then northing in metres.

How are precision and datum handled?

EPSG:2157 is based on IRENET95, aligned with ETRS89 for Irish mapping. Datum differences and source-coordinate quality still limit the result.

Where can I use this coordinate system?

ITM is intended for the island of Ireland. Coordinates outside its area of use are rejected rather than extrapolated.

What should I check?

  • Check that the selected latitude/longitude order matches each input row.
  • Use positions within the Irish Transverse Mercator area on the island of Ireland.
  • Distinguish ITM output from the older Irish Grid.

Which order does ITM output use?

The result shows easting first and northing second, both in metres.

What datum is ITM based on?

EPSG:2157 is based on IRENET95, aligned with ETRS89 for Irish mapping.