Coordinate Converter

About This Tool

The Coordinate Converter translates a single geographic point between the four most widely-used coordinate reference systems. It is used wherever coordinate formats must be matched between different tools, datasets, or agencies — for example, converting a GPS-recorded DD value into the MGRS format required by a military or emergency-services system.

Input

A coordinate entered manually in any of the four supported formats, or captured by clicking the map or searching a place name. The tool detects the input format automatically.

Output

The same point expressed simultaneously in DD, DMS, UTM, and MGRS, with a map marker confirming the location visually.

Coordinate Formats

DD

Decimal Degrees. Signed decimal numbers; e.g. 48.8566, 2.3522. The default for digital mapping, REST APIs, and most GPS receivers. Positive = N/E, negative = S/W.

DMS

Degrees Minutes Seconds. Sexagesimal format; e.g. 48° 51′ 23.8″ N, 2° 21′ 7.9″ E. Each degree is divided into 60 arcminutes, each arcminute into 60 arcseconds. Used in traditional nautical charts, aviation waypoints, and printed topo maps.

UTM

Universal Transverse Mercator. A metric Cartesian grid divided into 60 longitudinal zones (each 6° wide) × 20 latitude bands. A full UTM coordinate comprises zone number, hemisphere letter, Easting (m), and Northing (m); e.g. 31N 452109 5411704. Accurate for distances and area calculations within a single zone.

MGRS

Military Grid Reference System. A NATO alphanumeric extension of UTM. After the UTM zone designator, a two-letter 100 km square identifier is added, followed by numeric Easting and Northing within that square; e.g. 31UDQ5210911704. The letter prefix allows compact, human-readable references and reduces the risk of zone confusion. Used by military, civil protection, and search-and-rescue services worldwide.