Map Coordinate Converter
WGS84 (GPS) ↔ GCJ02 (Amap/Tencent) ↔ BD09 (Baidu)
Client-side Processing
Fast & Efficient
Developer Tool
WGS-84GPS / Google Earth
39.907783, 116.391207
GCJ-02Amap / Tencent
39.909187, 116.397451
BD-09Baidu Maps
39.915530, 116.403824
How to Convert Coordinates?
- 1First, select your current coordinate type in "Source System" (e.g., WGS-84 for raw GPS).
- 2Enter values in the Latitude (Lat) and Longitude (Lng) input boxes.
- 3The tool will automatically calculate the corresponding coordinates in other map systems (Amap, Baidu, etc.) in real-time.
- 4Click "Copy" to get the results, or click the map icon to view the location.
Map Conversion FAQ
Why is coordinate conversion necessary?
Mainland China uses an offset coordinate system (GCJ-02) for security. If you plot raw GPS (WGS-84) data on an Amap-based map directly, you'll see a shift of hundreds of meters.
What's the difference between WGS-84, GCJ-02, and BD-09?
WGS-84 is the global standard; GCJ-02 (Mars) is the Chinese domestic standard; BD-09 is Baidu's specific encryption. They cannot be mixed.
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