EPSG / CRS Lookup & Reprojector
Search any coordinate reference system by EPSG code or name, then reproject coordinates between two systems. CRS definitions are fetched from epsg.io (this tool needs an internet connection).
Reproject a coordinate
Axis order follows the proj4 definition (typically X/Easting/Longitude first). For EPSG:4326 enter longitude in X and latitude in Y.
About EPSG / CRS lookup
Every coordinate reference system (CRS) has an EPSG code — for example EPSG:4326 is WGS84 latitude/longitude, and EPSG:3857 is the Web Mercator projection used by Google Maps, OpenStreetMap and most web maps. This tool helps you find the right code and reproject coordinates between systems.
Common EPSG codes
- EPSG:4326 — WGS84 geographic (lat/lon degrees)
- EPSG:3857 — Web Mercator (metres, web maps)
- EPSG:32601–32660 / 32701–32760 — WGS84 UTM zones (N / S)
Frequently asked questions
Why do my coordinates look wrong after reprojecting?
Most often the input order is swapped. Geographic systems are usually lat/lon, while projected systems use easting/northing (x, y). Check which your source uses.
What is Web Mercator used for?
It's the standard for slippy web maps. It distorts area badly near the poles, so avoid it for area measurement — use a geodesic method instead.