Swedish Coordinate Converter

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Convert Swedish coordinates between WGS84 (GPS), SWEREF99 TM and RT90. Single conversion, batch import and interactive map.

Enter a coordinate below to convert between all formats. The format is detected automatically.

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Supported formats: 59.3293, 18.0686 · 59° 19.758' N, 18° 4.116' E · 59° 19' 45" N, 18° 4' 7" E
Import multiple coordinates from a file or paste them. Convert all at once and export the results.

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Click on the map to add points, or search for an address. Distances are calculated automatically.
Click to place a point

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Frequently Asked Questions

Which coordinate systems are supported?

The tool supports WGS84 (GPS coordinates), SWEREF99 TM (Sweden's official system since 2007) and RT90 2.5 gon V (older Swedish system). All conversions use exact EPSG parameters.

How accurate are the conversions?

Conversions follow EPSG standards with centimeter accuracy. For RT90, a 7-parameter Helmert transformation between Bessel and WGS84 is used.

Can I import from Excel?

Yes, export your Excel file as CSV (semicolon-separated) and import it in the batch tab. Coordinates should be in two columns.

What is the difference between SWEREF99 and RT90?

SWEREF99 TM is Sweden's official reference system since 2007, based on WGS84/GRS80. RT90 is the older system (1990-2007) based on the Bessel ellipsoid. They differ by 100-600 meters.

How does address lookup work?

Addresses are fetched via OpenStreetMap Nominatim. The service is limited to 1 request per second.

How do I share coordinates easily?

Copy the result and use the URL shortener to create a shareable link. You can also create a QR code with the coordinates for easy scanning.

Can I use the coordinates for testing?

Yes, export to CSV or JSON and use in your tests. Need complete test data with addresses and personal IDs? Try the test data generator.

What is SWEREF99TM and how do I convert it to WGS84?

SWEREF99TM (EPSG:3006) is Sweden's official coordinate system since 2007, based on the GRS80 ellipsoid. Coordinates are given as northing (N) and easting (E) in meters. To convert SWEREF99TM to WGS84 (GPS format with latitude and longitude in decimal degrees): paste the northing and easting in the field above, select source format SWEREF99TM and click Convert. The tool uses exact EPSG:3006 parameters. Need to convert an entire file between SWEREF99 TM, RT90 and WGS84? Use GeoKonvert for KML, GPX, GeoJSON, CSV and Shapefile files.

What is RT90 and how do I convert RT90 to WGS84?

RT90 2.5 gon V (EPSG:3021) is the older Swedish coordinate system used 1990-2007, based on the Bessel ellipsoid. RT90 coordinates are given as northing and easting in meters and differ by 100-600 meters from SWEREF99TM. To convert RT90 to WGS84: paste the RT90 coordinates in the field above and select source format RT90. The conversion uses a 7-parameter Helmert transformation.

How do I convert GPS coordinates in decimal form to degrees and minutes?

GPS coordinates in decimal degrees (e.g. 59.329300, 18.068600) can be converted to degrees and minutes (DMS, e.g. 59 degrees 19 minutes 45.48 seconds) directly in the tool. Paste the coordinates in decimal format, convert and then select output format "Degrees/min/sec" in the advanced settings. DDM format (degrees/decimal minutes) is also supported.

What is the difference between WGS84, SWEREF99TM and RT90?

WGS84 (EPSG:4326) is the global GPS system with coordinates in latitude and longitude (decimal degrees). SWEREF99TM (EPSG:3006) is Sweden's national system since 2007 with coordinates in meters (northing/easting), very close to WGS84 but optimized for Sweden. RT90 (EPSG:3021) is the older Swedish system based on the Bessel ellipsoid, with a deviation of 100-600 meters compared to SWEREF99TM. Use SWEREF99TM for modern Swedish maps and GIS data, RT90 for older data.

Which municipality or county does a coordinate belong to?

Upload a file with coordinates in Kommunkollen to get the municipality and county for each point. You can also look up a postal code or municipality directly in Kommunkollen.

Swedish coordinate systems: RT90, SWEREF99 and WGS84

Three coordinate systems are used in parallel in Sweden. RT90 (the national triangulation network from 1990) appears in older maps, property records and technical drawings. SWEREF99 TM replaced it as the official reference system in 2007 and is now used by the Swedish Mapping Authority, municipalities and public registries. WGS84 is the global standard behind GPS receivers and digital maps such as Google Maps.

The need to convert coordinates arises when working with data from different sources: coordinates from older databases, GPS readings, shapefiles from government open data or coordinates in geotechnical reports. The tool supports all three systems in both directions and handles decimal degrees, degrees/minutes/seconds and SWEREF99 TM Easting/Northing notation.

Batch mode accepts thousands of coordinates at once from CSV or pasted text. The map view lets you click to read coordinates directly. All calculations run locally in the browser. Your coordinates never leave your browser.