BD09 to WGS84

Convert BD09 coordinate system (Baidu Coordinate System) to WGS84 coordinate system

Standard Output

Output WGS84 coordinates commonly used by GPS

Reverse Restoration

Restore Baidu coordinates to standard coordinates

Universal

Suitable for international maps and GIS software integration

Coordinate Conversion

Convert coordinates from BD09 system to WGS84 system

Longitude

Latitude

About

BD09 to WGS84 requires first restoring to GCJ02, then to WGS84.
Suitable for exporting location data from the Baidu ecosystem to standard coordinates.
Conversion results can be used with GPS, international maps and standard GIS workflows.
Ideal for data cleaning, migration and cross-platform display scenarios.

How to Use

1
Paste BD09 coordinates taken from Baidu Maps, Baidu geocoding, or the Baidu Maps API — one point per line, single or batch.
2
Click Convert and both reversals run automatically: BD09 back to GCJ02, then GCJ02 back to WGS84 using iterative correction.
3
Copy the GPS-standard coordinates or download them for Google Earth, QGIS, and international systems. Free, with nothing ever leaving your device.

FAQ

QWhy does the conversion run in two steps?

ABD09 is stacked on top of GCJ02, so the faithful reversal undoes the layers in reverse order: first the Baidu offset, then the Mars Coordinate offset. Doing it in one shortcut formula is less stable and loses precision.

QHow accurate is the final WGS84 result?

AThe BD09 stage reverses exactly; the GCJ02 stage contributes an iterative error of roughly 1-2 meters. For map display, geocoding cleanup, and cross-platform migration this is well within tolerance.

QCan I plot the output on Google Maps and Google Earth?

AYes. Google services use WGS84 internationally, so the converted coordinates drop straight in without further transformation — that is the main reason to export Baidu data to WGS84.