Convert latitude and longitude between decimal degrees, degrees minutes seconds, UTM and MGRS, one point or a pasted list. Runs on your device.
To convert coordinates, paste a latitude and longitude in any common format and read it back as decimal degrees, degrees minutes seconds (DMS), degrees and decimal minutes (DDM), UTM and MGRS. Decimal degrees such as 40.7128, -74.0060 are the same position as 40°42'46.08"N 74°0'21.60"W: the minutes are divided by 60 and the seconds by 3600. A minus sign or the letters S and W mean south and west. Put the letters before or after the numbers, in either order, and the tool works out which is latitude and which is longitude. Commas and semicolons separate numbers, so write decimals with a point. Each line of the box is one point, up to 2000 lines.
UTM cuts the world between 80 degrees south and 84 degrees north into 60 zones, each 6 degrees of longitude wide, and 20 latitude bands lettered C to X without I and O. A position is the zone, the band, the easting in metres from a line 500,000 m west of the zone's central meridian, and the northing in metres from the equator (10,000,000 m is added in the south). Two zones are widened: southwest Norway, between 56 and 64 degrees north and 3 and 12 degrees east, uses zone 32 instead of 31, and Svalbard uses only zones 31, 33, 35 and 37 for band X. The tool applies both. Outside 80 S to 84 N the polar grid applies, which this tool does not cover.
Every conversion assumes the WGS84 datum, the one GPS uses, with the usual UTM scale of 0.9996 on the central meridian. The projection is computed with the Krüger series from Karney's 2011 paper, which is accurate to a few nanometres, so rounding to the whole metre is the limit you see. Coordinates taken from an old paper map may use another datum such as NAD27 or ED50, and the difference can be tens or hundreds of metres. This tool does not shift datums. MGRS is written to 1 metre with ten digits after the zone, band and 100 km square letters, and the digits are cut off rather than rounded, as the standard requires.
Paste a whole list to convert it at once. The result box has one line per input, a table shows the first 100 lines in every format, and a CSV output holds all of them with the header line, latitude, longitude, DMS, DDM, UTM and MGRS. A line that cannot be read is reported by its number, for example Line 2, and the text you typed is never repeated back or sent anywhere. The page makes no map links, so no coordinate is ever put into a web address or sent to another site.
Keep the whole degrees, multiply the fraction by 60 for minutes, then the leftover fraction by 60 for seconds. 40.7128 becomes 40 degrees; 0.7128 × 60 = 42.768 minutes; 0.768 × 60 = 46.08 seconds, so 40°42'46.08"N.
Paste the point and read the UTM column. New York City at 40.7128, -74.0060 is zone 18T, easting 583959 and northing 4507351. The zone comes from the longitude, the band letter from the latitude, and the rest from the map projection.
Decimal degrees (40.7128, -74.0060), those with N S E W letters, DMS (40 42 46 N 74 0 21 W, with or without ° ' marks), DDM (40 42.768 N), and UTM such as 18T 583959 4507351 or 56 south 334369 6250948. A band letter from C to M means the southern hemisphere.
Two exceptions change the usual 6 degree rule. Bergen, at 60.39 N and 5.32 E, is in zone 32V rather than 31V. Svalbard at 78.2 N and 15.6 E is in 33X, because zones 32X, 34X and 36X are not used.
They describe the same grid. MGRS replaces the long easting and northing with two letters for the 100 km square plus digits, such as 4QFJ1234567890 for zone 4, band Q, square FJ, 12345 east and 67890 north. More digits means a smaller square: 10 digits is 1 m, 6 digits is 100 m.
Decimal, DMS and DDM work for any latitude from -90 to 90 and longitude from -180 to 180. UTM and MGRS exist only from 80 S to 84 N; beyond that the result shows no UTM, because the polar grid (UPS) is a different system that this tool does not cover.