Convert CH1903+ to ETRS89

Convert coordinates from CH1903+ (EPSG:4150) to ETRS89 (EPSG:4258) — 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-4150-to-epsg-4258

Official EPSG transformation from CH1903+ to ETRS89

The EPSG Geodetic Parameter Dataset defines 1 transformation between CH1903+ (EPSG:4150) and ETRS89 (EPSG:4258). Its parameters, accuracy and area of use are listed below.

CH1903+ to ETRS89 (1)

EPSG:1647±0.1 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Europe - Liechtenstein and Switzerland
Scope:: Transformation of coordinates at 0.1m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	674.374	metre
Y-axis translation(ty)	15.056	metre
Z-axis translation(tz)	405.346	metre

This transformation is also given as CH1903+ to CHTRS95 (1) (code 1509). CHTRS95 is a national realization of ETRS89. May be taken as approximate transformation CH1903+ to WGS 84 - see code 1676.

Convert EPSG:4150 to EPSG:4258 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4150", "EPSG:4258", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4150 — CH1903+

geographic system using latitude and longitude on an ellipsoid · Area of use: Europe - Liechtenstein and Switzerland

+proj=longlat +ellps=bessel +towgs84=674.374,15.056,405.346,0,0,0,0 +no_defs +type=crs

More about EPSG:4150 →

Target: EPSG:4258 — ETRS89

geographic system using latitude and longitude on an ellipsoid · Area of use: Europe - ETRF by country

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

More about EPSG:4258 →

Frequently asked questions

How accurate is converting CH1903+ to ETRS89?: 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:4258 to EPSG:4150 →