GDA94 to WGS84 Coordinate Converter
Free online tool to convert coordinates from Geocentric Datum of Australia 1994 (EPSG:4283) to World Geodetic System 1984 (lat/lng) (EPSG:4326). Professional-grade accuracy using proj4, zero install, runs in your browser.
About GDA94
Geocentric Datum of Australia 1994 (EPSG:4283). Australian national datum, now transitioning to GDA2020 (+1.8m drift). Used across all state cadastres and surveying.
About WGS84
World Geodetic System 1984 (lat/lng) (EPSG:4326). The global reference system used by GPS, Google Maps and virtually all modern navigation. Defined by satellite geodesy and continuously refined.
Frequently Asked Questions
What is the difference between GDA94 and WGS84?
GDA94 (EPSG:4283) is geographic and based in Australia, while WGS84 (EPSG:4326) is geographic based in Global. Australian national datum, now transitioning to GDA2020 (+1.8m drift). Used across all state cadastres and surveying. In contrast, the global reference system used by gps, google maps and virtually all modern navigation. defined by satellite geodesy and continuously refined.
Is this conversion accurate for surveying?
Yes. The conversion uses the industry-standard proj4 library with full datum shift parameters (including seven-parameter Helmert transformation for GDA94). Typical accuracy is sub-meter for civilian applications. For cadastral precision, always verify against the official agency datum.
What coordinate format should I use?
For GDA94, enter coordinates as decimal degrees in the format "lat, lng" (e.g. 45.4642, 9.1900). The tool auto-detects the format.
Can I convert many points at once?
Yes, use our batch CSV converter. Upload a CSV with your points, select the transformation, download the converted file. Free with a SurveyingPedia account.
Is there an API?
Yes — call /api/v1/transform?from=EPSG:4283&to=EPSG:4326&coords=lat,lng for programmatic access. It returns the transformed coordinates as JSON.