GDA94 to WGS84 Converter
About GDA94 Coordinate System
GDA94 (Geocentric Datum of Australia 1994) is the previous official geodetic datum for Australia, aligned with ITRF92 at epoch 1994.0. It uses the GRS80 ellipsoid and is functionally equivalent to WGS84 for most applications.
GDA94 was adopted in 2000 as Australia's first geocentric datum, replacing the AGD66/AGD84 (Australian Geodetic Datums). It provided a modern, GPS-compatible reference system for the continent.
GDA94 has been the standard datum for Australian spatial data since 2000. While GDA2020 is the current standard, large volumes of legacy data remain in GDA94 and conversion is commonly needed.
GDA94 was Australia's first geocentric datum, establishing a modern reference system aligned with GPS technology.
GDA94 uses the GRS80 ellipsoid (a=6378137m, 1/f=298.257222101), the same as WGS84 and most modern satellite positioning systems.
About WGS84 Coordinate System
WGS84 (World Geodetic System 1984) is the global standard geodetic reference system used by GPS. It defines an Earth-centered, Earth-fixed coordinate system and geodetic datum.
Developed by the U.S. Department of Defense in 1984, WGS84 has undergone several refinements (WGS84(G730), WGS84(G873), WGS84(G1150), WGS84(G1762)) to improve accuracy through GPS satellite observations.
WGS84 is the default coordinate system for GPS receivers worldwide. It is used in aviation, maritime navigation, Google Maps, OpenStreetMap, GIS applications, and scientific research.
WGS84 is the native coordinate system of the Global Positioning System (GPS), ensuring direct compatibility with all GPS receivers and satellite navigation systems worldwide.
As the most widely adopted geodetic datum, WGS84 provides a consistent global reference frame for mapping, surveying, and geospatial data exchange across international boundaries.
With continuous refinements, WGS84 achieves centimeter-level accuracy globally, making it suitable for high-precision applications like surveying, drone navigation, and scientific research.
GDA94 to WGS84 Conversion Guide
// GDA94 → WGS84 (effectively identical)
// Both systems use essentially the same reference ellipsoid
// No transformation is needed for most practical applications
// At sub-meter accuracy level:
// GDA94 uses the same GRS80 ellipsoid as WGS84
// Difference typically < 1 meter
GDA94 and WGS84 are essentially identical for most practical applications. Both use the GRS80 ellipsoid (a=6378137m) with a negligible flattening difference. The coordinate difference is typically less than 1 meter.
- Enter your GDA94 coordinates in the input field (latitude, longitude, one pair per line)
- Click the Convert button to transform coordinates from GDA94 to WGS84
- Review the converted WGS84 coordinates in the output field
- Copy the results or save them as an XLSX file for further use
- No transformation is needed - GDA94 and WGS84 are practically equivalent for most applications
- For batch conversions, enter one coordinate pair per line
- Verify a sample of converted coordinates on your target platform
- All conversions are performed client-side for complete data privacy