Convert LUREF to WGS 84

Convert coordinates from LUREF (EPSG:4181) to WGS 84 (EPSG:4326) — 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-4181-to-epsg-4326

Official EPSG transformations from LUREF to WGS 84

The EPSG Geodetic Parameter Dataset defines 4 transformations between LUREF (EPSG:4181) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

LUREF to WGS 84 (2)

EPSG:1079±1 mBest accuracy

Method:: Molodensky-Badekas (CF geog2D domain)
Area of use:: Luxembourg
Scope:: (null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Parameter	Value	Unit
X-axis translation(tx)	-265.983	metre
Y-axis translation(ty)	76.918	metre
Z-axis translation(tz)	20.182	metre
X-axis rotation(rx)	0.4099	arc-second
Y-axis rotation(ry)	2.9332	arc-second
Z-axis rotation(rz)	-2.6881	arc-second
Scale difference(ds)	0.43	parts per million
Pivot X(px)	4098647.674	metre
Pivot Y(py)	442843.139	metre
Pivot Z(pz)	4851251.093	metre

Parameter values from LUREF to ETRS89 (2) (code 1078). Assumes ETRS89 and WGS 84 can be considered the same to within the accuracy of the transformation.

LUREF to WGS 84 (1)

EPSG:1643±1 m

Method:: Position Vector transformation (geog2D domain)
Area of use:: Luxembourg
Scope:: (null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Parameter	Value	Unit
X-axis translation(tx)	-193	metre
Y-axis translation(ty)	13.7	metre
Z-axis translation(tz)	-39.3	metre
X-axis rotation(rx)	-0.41	arc-second
Y-axis rotation(ry)	-2.933	arc-second
Z-axis rotation(rz)	2.688	arc-second
Scale difference(ds)	0.43	parts per million

Parameter values from LUREF to ETRS89 (1) (code 1642). Assumes ETRS89 and WGS 84 can be considered the same to within the accuracy of the transformation.

LUREF to WGS 84 (4)

EPSG:5484±1 m

Method:: Molodensky-Badekas (CF geog2D domain)
Area of use:: Luxembourg
Scope:: (null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Parameter	Value	Unit
X-axis translation(tx)	-265.8867	metre
Y-axis translation(ty)	76.9851	metre
Z-axis translation(tz)	20.2667	metre
X-axis rotation(rx)	0.33746	arc-second
Y-axis rotation(ry)	3.09264	arc-second
Z-axis rotation(rz)	-2.53861	arc-second
Scale difference(ds)	0.4598	parts per million
Pivot X(px)	4103620.3943	metre
Pivot Y(py)	440486.4235	metre
Pivot Z(pz)	4846923.4558	metre

Parameter values from LUREF to ETRS89 (4) (code 5483) assuming ETRS89 and WGS 84 are coincident within the one metre level. Replaces CT code 1079. For an equivalent transformation using the Coordinate Frame method see code 5486.

LUREF to WGS 84 (3)

EPSG:5486±1 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Luxembourg
Scope:: (null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Parameter	Value	Unit
X-axis translation(tx)	-189.6806	metre
Y-axis translation(ty)	18.3463	metre
Z-axis translation(tz)	-42.7695	metre
X-axis rotation(rx)	0.33746	arc-second
Y-axis rotation(ry)	3.09264	arc-second
Z-axis rotation(rz)	-2.53861	arc-second
Scale difference(ds)	0.4598	parts per million

Parameter values from LUREF to ETRS89 (3) (code 5485) assuming ETRS89 and WGS 84 are coincident within the one metre level. Replaces CT code 1643. For an equivalent transformation using the Molodensky-Badekas method see code 5484.

Convert EPSG:4181 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4181", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4181 — LUREF

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

+proj=longlat +ellps=intl +towgs84=-189.6806,18.3463,-42.7695,-0.33746,-3.09264,2.53861,0.4598 +no_defs +type=crs

More about EPSG:4181 →

Target: EPSG:4326 — WGS 84

geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)

+proj=longlat +datum=WGS84 +no_defs +type=crs

More about EPSG:4326 →

Frequently asked questions

How accurate is converting LUREF to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±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:4326 to EPSG:4181 →