Convert RT90 to SWEREF99

Convert coordinates from RT90 (EPSG:4124) to SWEREF99 (EPSG:4619) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4124-to-epsg-4619

Official EPSG transformation from RT90 to SWEREF99

The EPSG Geodetic Parameter Dataset defines 1 transformation between RT90 (EPSG:4124) and SWEREF99 (EPSG:4619). Its parameters, accuracy and area of use are listed below.

RT90 to SWEREF99 (1)

EPSG:1895±0.1 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Sweden
Scope:: Transformation of coordinates at 0.1m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	414.1	metre
Y-axis translation(ty)	41.3	metre
Z-axis translation(tz)	603.1	metre
X-axis rotation(rx)	0.855	arc-second
Y-axis rotation(ry)	-2.141	arc-second
Z-axis rotation(rz)	7.023	arc-second
Scale difference(ds)	0	parts per million

Derived at 165 points in 2001. Also given by EuroGeographics as RT90 to ETRS89 using the Position Vector transformation method. Replaces RT90 to ETRS89 (1) (code 1437). May be taken as approximate transformation RT90 to WGS 84 - see code 1896.

Convert EPSG:4124 to EPSG:4619 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4124", "EPSG:4619", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4124 — RT90

geographic system using latitude and longitude on an ellipsoid · Area of use: Sweden

+proj=longlat +ellps=bessel +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs +type=crs

More about EPSG:4124 →

Target: EPSG:4619 — SWEREF99

geographic system using latitude and longitude on an ellipsoid · Area of use: Sweden

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:4619 →

Frequently asked questions

How accurate is converting RT90 to SWEREF99?: The most accurate official EPSG transformation between these systems is accurate to about ±0.1 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation in a desktop GIS.
Does my data leave the browser when I use this converter?: No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.

Need the reverse? Convert EPSG:4619 to EPSG:4124 →