WGS84 to Lambert 93 Coordinate Converter
Free online tool to convert coordinates from World Geodetic System 1984 (lat/lng) (EPSG:4326) to RGF93 / Lambert-93 (France mainland) (EPSG:2154). Professional-grade accuracy using proj4, zero install, runs in your browser.
About WGS84
World Geodetic System 1984 (lat/lng) (EPSG:4326). The global reference system used by GPS, Google Maps and virtually all modern navigation. Defined by satellite geodesy and continuously refined.
About Lambert 93
RGF93 / Lambert-93 (France mainland) (EPSG:2154). The official projection of metropolitan France since 2000. Covers all mainland France + Corsica in a single system with minimal distortion.
Frequently Asked Questions
What is the difference between WGS84 and Lambert 93?
WGS84 (EPSG:4326) is geographic and based in Global, while Lambert 93 (EPSG:2154) is national grid based in France. The global reference system used by GPS, Google Maps and virtually all modern navigation. Defined by satellite geodesy and continuously refined. In contrast, the official projection of metropolitan france since 2000. covers all mainland france + corsica in a single system with minimal distortion.
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 WGS84, enter coordinates as decimal degrees in the format "lat, lng" (e.g. 45.4642, 9.1900). 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:4326&to=EPSG:2154&coords=lat,lng for programmatic access. It returns the transformed coordinates as JSON.