Convert UTM to WGS84

UTM zone 33N (EPSG:25833) is the standard projected coordinate system for most of Norway. This tool converts UTM eastings and northings to WGS84 latitude/longitude — the format used by GPS devices, web maps, and most APIs — and back the other direction.

GeoTransformMap. Analyze. Convert.
Drop .xlsx anywhere⌘O
1

Source file

2

Identify coordinate columns

3

Coordinate reference systems

Sourcefrom
ETRS89 / UTM zone 33N
EPSG:25833
units: meters · projected
Targetto
WGS 84 (longitude / latitude)
EPSG:4326
units: degrees · geographic
4

Transform & export

Idle — waiting for file
proj4 2.20
leaflet 1.9

About this conversion

UTM (Universal Transverse Mercator) divides the world into 60 six-degree zones. Zone 33N covers central and northern Norway (12°–18° East), with eastings measured in metres from a false origin and northings measured from the equator. WGS84 (EPSG:4326) is the geographic coordinate system used by GPS and most web mapping platforms: positions are expressed as decimal-degree latitude and longitude.

This conversion is essential whenever field data (collected in UTM by surveyors, municipalities, or Kartverket products) needs to be plotted on Google Maps, Leaflet, OpenStreetMap, or shared with systems that expect lat/lon. In Norway, the underlying datum for EPSG:25833 is ETRS89, which is aligned with WGS84 to within roughly 0.5 metres — precise enough for almost all mapping and spatial analysis use cases.

GeoTransform handles batch conversion from Excel spreadsheets: upload a file, pick the columns containing your X/Y values, choose the target CRS, and download the converted file. The map pane shows both the original and converted points side by side so you can visually confirm nothing ended up in the Atlantic.

Frequently Asked Questions

Is EPSG:25833 the same as WGS84/UTM zone 33N (EPSG:32633)?
No. EPSG:25833 uses the ETRS89 datum, while EPSG:32633 uses WGS84. In Norway the two datums differ by roughly 0.3–0.5 metres — usually negligible for mapping, but significant for surveying and engineering.
Which UTM zone do I use for Norway?
Zone 32N (EPSG:25832) covers southern and western Norway (6°–12° East). Zone 33N (EPSG:25833) covers central and northern Norway. Zones 34 and 35 cover the far northeast, including Finnmark. Pick the zone your source data is in — mixing zones distorts distances.
Can I convert a whole spreadsheet at once?
Yes. Upload an .xlsx file, pick the columns containing X (easting) and Y (northing), choose your target CRS, and the converter processes every row. The output is a new .xlsx file with two extra columns for the converted coordinates.
Why do my converted coordinates look swapped?
WGS84 (EPSG:4326) uses longitude/latitude order in some conventions and latitude/longitude in others. GeoTransform always writes X = longitude, Y = latitude for geographic CRSs. If your target system expects lat/lon, swap the columns after export.

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