Convert AGD84 to WGS 84

Convert coordinates from AGD84 (EPSG:4203) 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-4203-to-epsg-4326

Official EPSG transformations from AGD84 to WGS 84

The EPSG Geodetic Parameter Dataset defines 5 transformations between AGD84 (EPSG:4203) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

AGD84 to WGS 84 (9)

EPSG:15785±2.9 mBest accuracy

Method:: NTv2
Area of use:: Australia - AGD84
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.

Grid file: National 84 (02.07.01).gsb

Parameter values from AGD84 to GDA94 (5) (code 1804). Approximation assuming WGS 84 is equivalent to GDA94; ignores the low accuracy of the WGS 84 ensemble and the inconsistent application of tectonic plate motion to WGS 84 data.

AGD84 to WGS 84 (7)

EPSG:1669±3 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Australia - AGD84
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)	-117.763	metre
Y-axis translation(ty)	-51.51	metre
Z-axis translation(tz)	139.061	metre
X-axis rotation(rx)	-0.292	arc-second
Y-axis rotation(ry)	-0.443	arc-second
Z-axis rotation(rz)	-0.277	arc-second
Scale difference(ds)	-0.191	parts per million

Parameter values from AGD84 to GDA94 (2) (code 1280). Approximation assuming WGS 84 is equivalent to GDA94; ignores low accuracy of the WGS 84 ensemble and inconsistent application of tectonic plate motion. Replaces AGD84 to WGS 84 (2) (code 1236).

AGD84 to WGS 84 (1)

EPSG:1109±4 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Australia - AGD84
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-134	metre
Y-axis translation(ty)	-48	metre
Z-axis translation(tz)	149	metre

Derived at 90 stations. Accuracy 2m in each axis. Note: AGD84 officially adopted only in Queensland, South Australia and Western Australia.

AGD84 to WGS 84 (2)

EPSG:1236±5 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Australia - AGD84
Scope:: Preliminary estimate.

Parameter	Value	Unit
X-axis translation(tx)	-116	metre
Y-axis translation(ty)	-50.47	metre
Z-axis translation(tz)	141.69	metre
X-axis rotation(rx)	-0.23	arc-second
Y-axis rotation(ry)	-0.39	arc-second
Z-axis rotation(rz)	-0.344	arc-second
Scale difference(ds)	0.0983	parts per million

"Higgins parameters". Replaced by AGD84 to GDA94 (2) (code 1280) and AGD84 to WGS 84 (7) (code 1669). Note: AGD84 officially adopted only in Queensland, South Australia and Western Australia.

AGD84 to WGS 84 (8)

EPSG:15789±5 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Australia - AGD84
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)	-128.5	metre
Y-axis translation(ty)	-53	metre
Z-axis translation(tz)	153.4	metre

Parameter values from AGD84 to GDA94 (1) (code 1279). Approximation assuming WGS 84 is equivalent to GDA94; ignores the low accuracy of the WGS 84 ensemble and the inconsistent application of tectonic plate motion to WGS 84 data.

Convert EPSG:4203 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4203", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4203 — AGD84

geographic system using latitude and longitude on an ellipsoid · Area of use: Australia - AGD84

+proj=longlat +ellps=aust_SA +no_defs +type=crs

More about EPSG:4203 →

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 AGD84 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±2.9 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) 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:4203 →