Maps and geodesy
Coordinate converter: decimal degrees, DMS, UTM and MGRS
Convert WGS84 coordinates between decimal degrees, degrees-minutes-seconds, degrees and decimal minutes, UTM and MGRS, with grid convergence and scale factor.
Runs in your browser. What you enter stays on this page and is not uploaded.
Showing the worked example. Results update as you type.
Result
- All coordinates are on the WGS84 datum. Positions from another datum (for example a national grid) need a datum transformation first.
Method and limits
Latitude and longitude can be typed as decimal degrees (negative for south and west), degrees and decimal minutes, or degrees, minutes and seconds with N, S, E or W. The converter shows every form, plus the Universal Transverse Mercator (UTM) and Military Grid Reference System (MGRS) coordinates of the same point.
UTM
UTM divides the Earth into 60 zones 6° wide, each a transverse Mercator projection with scale 0.9996 on its central meridian, a false easting of 500,000 m and, south of the equator, a false northing of 10,000,000 m. The zone follows the standard exceptions: zone 32V is widened over south-west Norway and zones 31X, 33X, 35X and 37X cover Svalbard. The projection is computed with Krüger’s series to sixth order in the third flattening, as given by Karney (2011), which is accurate to a few nanometres within the zone. Grid convergence is the angle from grid north to true north; the scale factor is the ratio of grid to ellipsoid distance at the point.
MGRS
MGRS writes the UTM zone, an 8° latitude band letter (C to X), a two-letter 100 km square and then equal numbers of easting and northing digits. Digits are truncated, not rounded, so 38SMB4488 names a 1 km square; an MGRS input is converted to the centre of its square.
Worked example (from GeographicLib’s GeoConvert documentation): 33°20′03.25″N, 44°24′13.06″E is 33.33424°, 44.40363°, UTM 38N 444500 3688500 and MGRS 38SMB4488 at 1 km precision.
Limits
All values are on WGS84 (GPS and web maps). Coordinates on another datum, such as a national grid or NAD27, differ by metres to hundreds of metres and need a datum transformation first. UTM and MGRS stop at 80°S and 84°N; the polar UPS system is not handled.
References
Related tools
- Distance and bearing between two coordinatesGeodesic distance, initial and final bearing and midpoint between two latitude/longitude points on the WGS84 ellipsoid, with the haversine great-circle result for comparison.
- Destination point from bearing and distanceFind where you arrive after travelling a distance on an initial bearing from a start point, on the WGS84 ellipsoid, with the final bearing and the spherical answer for comparison.
- Polygon area on the ellipsoid from coordinatesPaste latitude/longitude points, GeoJSON or WKT and get the area and perimeter of the polygon on the WGS84 ellipsoid, in km², hectares, acres and square miles.