Web Mercator to ETRS89 UTM 32N Coordinate Converter
Free online tool to convert coordinates from Pseudo-Mercator / Spherical Mercator (EPSG:3857) to ETRS89 / UTM zone 32N (Germany west) (EPSG:25832). Professional-grade accuracy using proj4, zero install, runs in your browser.
About Web Mercator
Pseudo-Mercator / Spherical Mercator (EPSG:3857). The projection used by Google Maps, OpenStreetMap and most web mapping. Not suitable for precise surveying due to scale distortion.
About ETRS89 UTM 32N
ETRS89 / UTM zone 32N (Germany west) (EPSG:25832). German official system for western Länder. ETRS89 is the European Terrestrial Reference System, the de-facto standard for EU surveying.
Frequently Asked Questions
What is the difference between Web Mercator and ETRS89 UTM 32N?
Web Mercator (EPSG:3857) is projected and based in Global, while ETRS89 UTM 32N (EPSG:25832) is utm based in Germany. The projection used by Google Maps, OpenStreetMap and most web mapping. Not suitable for precise surveying due to scale distortion. In contrast, german official system for western länder. etrs89 is the european terrestrial reference system, the de-facto standard for eu surveying.
Is this conversion accurate for surveying?
Yes. The conversion uses the industry-standard proj4 library with full datum shift parameters (). 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 Web Mercator, enter coordinates as easting, northing in meters (e.g. 514500, 5033880). 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:3857&to=EPSG:25832&coords=lat,lng for programmatic access. It returns the transformed coordinates as JSON.