Paste OS Grid Refs, Irish Grid Refs, Easting/Northing, Lat/Lon, or postcodes — one per line.
Pick one column (a mixed location string per row), or two columns to combine as "A, B" per row (e.g. separate Latitude/Longitude or Easting/Northing columns).
| Input | Type | OS Grid Ref | Easting | Northing | Irish Grid Ref | Lat | Lon | Postcode ⓘ | ITL1 | ITL2 | ITL3 |
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UK Geospatial Converter converts between the location formats used across the UK and Ireland: OS Grid References (the British National Grid used on Ordnance Survey maps of England, Scotland and Wales), Irish Grid References (used in Northern Ireland and the Republic of Ireland), Easting/Northing (OSGB36), decimal Latitude/Longitude (WGS84), and full or partial UK postcodes — including their ITL1/ITL2/ITL3 region. Paste one location per line, or upload a CSV, and see every format side by side on an interactive map.
Latitude/Longitude (WGS84) is the hub every input converts to first, and every other format shown is then derived from that shared point.
An OS Grid Reference (e.g. "NT 257 735") is the alphanumeric coordinate system Ordnance Survey uses on its maps of Great Britain, based on the British National Grid. This tool converts OS Grid References to and from postcodes, Easting/Northing, and Latitude/Longitude.
Yes — paste a full or partial postcode (e.g. "SW1A 1AA" or just "SW1A") and it converts to OS Grid Reference, Easting/Northing, Latitude/Longitude, and identifies the postcode's ITL1/ITL2/ITL3 region.
Yes. Northern Ireland uses the Irish Grid rather than the British National Grid, and this tool automatically detects and converts both Irish Grid References and Northern Ireland postcodes.
Yes — paste up to 2000 locations (one per line) or upload a CSV, then download the results as CSV or Excel.
No. This is an independent tool built using published open coordinate-conversion formulae and open postcode data — it is not affiliated with or endorsed by Ordnance Survey, Royal Mail, or the Office for National Statistics.