Convert latitude/longitude (WGS84) to Web Mercator (EPSG:3857) X/Y in metres — the projection Google Maps, OpenStreetMap and most web maps draw in. Free and in your browser.
Web Mercator (EPSG:3857) expresses positions as metres east/north of the origin, and is what nearly every web basemap uses internally. Converting lat/long to 3857 is handy when a mapping API or tile scheme wants projected X/Y.
No. WGS84 (EPSG:4326) is longitude/latitude in degrees; Web Mercator (EPSG:3857) is a projection of it into metres. They describe the same place with very different numbers.
Input can be decimal degrees (48.8584), DMS (48°51'30"N or 48 51 30 N), or DDM (48°51.5'N). The tool outputs DD, DMS, DDM, Web Mercator (EPSG:3857) and UTM at once.
Latitude runs −90 to 90 (N/S); longitude runs −180 to 180 (E/W). Mixing them up is the most common mistake — enter each in its own box.
The DD/DMS/DDM conversion is pure math and works offline. Web Mercator and UTM use a small projection library that downloads once and is then cached.
No. Everything is computed in your browser — nothing is uploaded.
