Irish Grid / ITM Converter
Converts between Irish Grid or ITM eastings and northings and latitude and longitude.
Irish Transverse Mercator (ITM / EPSG:2157)
Convert in either direction.
Result
Enter a coordinate and press Convert.
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Pick the direction (lat/long ⇄ grid).
- Enter WGS84 coordinates or ITM easting/northing.
- Press Convert.
How it works
Converts between WGS84 latitude/longitude and Irish Transverse Mercator (ITM, EPSG:2157), the modern grid for the island of Ireland.
The legacy Irish Grid (TM75) uses different false origins and a slightly different datum, so its coordinates will differ.
Worked example
Dublin (53.3498, −6.2603). Converts to about 715,830 m E, 734,697 m N in ITM.
Frequently asked questions
Is this ITM or the old Irish Grid?
This uses Irish Transverse Mercator (ITM), the current standard. The older Irish Grid (TM75) has different offsets.
Related tools
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- UTM to Lat/Long Converter
Explore more in Surveying, Coordinates, GIS & CAD.
Cite this tool
Zerdly. (2026). Irish Grid / ITM Converter. Retrieved from https://www.zerdly.com/tools/irish-grid-converter-ig-itm/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.