ED50 / UTM zone 30N to KML & KMZ

Good to know

• Pick the UTM zone by longitude. Points outside the zone's area of use are flagged after conversion.
• Datum: Published 3-parameter shift (typically a few metres).

Convert a whole spreadsheet

1. Open the web app or the Windows app, and paste your rows from Excel or open a CSV file.
2. Under Coordinate system, search for “23030” and pick ED50 / UTM zone 30N.
3. Check one point you know on the map, then press Save KML or Save KMZ and open it in Google Earth.

Common mistakes with ED50 / UTM zone 30N

• Feet entered as metres. ED50 / UTM zone 30N is in metres. Coordinates copied from a drawing in feet must be converted first, or every point moves outwards from the grid's origin.
• Forgetting the datum. ED50 / UTM zone 30N is not on WGS 84: published 3-parameter shift (typically a few metres). Picking a WGS 84 grid with the same projection instead leaves the points off by that amount.
• Points outside the grid's area. ED50 / UTM zone 30N is meant for Europe - between 6°W and 0°W - Channel Islands (Jersey, Guernsey); France offshore; Gibraltar; Ireland offshore; Norway including Svalbard - offshore; Spain - onshore; United Kingdom - UKCS offshore. Points well outside that area convert with growing error; the converter flags them so you can choose the right grid.
• A local site grid. If every point is off by the same distance and direction, the drawing may be on a local site grid. Calibrate on three or more known control points instead.

New to this? Read how to convert easting and northing to latitude and longitude.