RGF93 / Lambert-93 Converter (France)
Convert between French RGF93 Lambert-93 eastings/northings (EPSG:2154) and latitude/longitude.
RGF93 / Lambert-93 (EPSG:2154)
Convert in either direction.
Result
Enter a coordinate and press Convert.
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Choose the direction (lat/long ⇄ grid).
- Enter the WGS84 coordinates or the Lambert-93 easting/northing.
- Press Convert.
How it works
Converts between WGS84 latitude/longitude and RGF93 / Lambert-93 (EPSG:2154), the official projected system for metropolitan France, using a Lambert Conformal Conic projection.
RGF93 is aligned with WGS84, so there is no datum rotation — results are accurate for general mapping use.
Worked example
Paris (48.8566, 2.3522). Converts to about 652,090 m E, 6,862,035 m N in Lambert-93.
Frequently asked questions
Does this cover overseas French territories?
No — Lambert-93 is for metropolitan France. Overseas territories use their own UTM-based systems.
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Cite this tool
Zerdly. (2026). RGF93 / Lambert-93 Converter (France). Retrieved from https://www.zerdly.com/tools/rgf93-lambert-93-converter-france/
Tip: Enter any known values to calculate the remaining results.
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