Convert latitude & longitude between DMS (degrees minutes seconds), decimal degrees, degrees decimal minutes, Web Mercator and UTM — instantly, in your browser. Paste a coordinate in any format and read the rest.
Decimal degrees (DD) — a single signed number per axis (48.8584, 2.2945). Compact and what most software and GeoJSON expect.
Degrees minutes seconds (DMS) — 48°51'30"N. Traditional on maps and in surveying. DD = degrees + minutes/60 + seconds/3600 (negative for South/West).
Degrees decimal minutes (DDM) — 48°51.5'N. Common on marine GPS and aviation.
Web Mercator & UTM — projected systems in metres, used by web maps (3857) and surveying/military (UTM). Useful when a tool wants X/Y in metres rather than degrees.
Paste a coordinate like 48°51'30"N into the latitude box. The decimal-degrees value appears instantly. Formula: DD = degrees + minutes/60 + seconds/3600, negated for S/W.
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.
