Maps / 02
Coordinate Converter: DD, DMS, UTM, MGRS
Convert GPS coordinates between decimal degrees, degrees-minutes-seconds, degrees and decimal minutes, UTM, and MGRS, with the input format detected automatically, and open the point on a map.
Coordinate Converter: DD, DMS, UTM, MGRS: All formats are converted on the WGS-84 ellipsoid used by GPS. UTM is computed with Krüger's series for the transverse Mercator projection, which agrees with the PROJ library to under a millimetre, and MGRS adds the military grid's zone and 100 km square letters, including the special zones for Norway and Svalbard. The input format is recognised from what you type. Runs 100% locally in your browser with zero server file uploads.
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- Everyday tools
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| Decimal degrees | 48.858370, 2.294481 | |
|---|---|---|
| Degrees, minutes, seconds | 48°51′30.13″N 2°17′40.13″E | |
| Degrees and decimal minutes | 48°51.50220′N 2°17.66886′E | |
| UTM | 31U 448251 5411952 | |
| MGRS | 31U DQ 48250 11951 |
All formats use the WGS-84 datum, as GPS and online maps do. UTM and MGRS cover 80°S to 84°N; polar regions use UPS instead. MGRS is shown to 1 metre.
Reading coordinates
Latitude measures north or south of the equator, from 0° to 90°; longitude measures east or west of the Greenwich meridian, from 0° to 180°. One degree of latitude is about 111 km, a minute about 1.85 km (a nautical mile), and a second about 31 m.
Most phones and map sites show decimal degrees. Older paper maps, aviation, and marine charts often use degrees and decimal minutes, while hiking maps and emergency services in many countries use a UTM or MGRS grid printed on the map.
Measuring between points
To find the distance and heading between two coordinates, paste them into the distance calculator; for the sunrise and sunset at a point, use sunrise and sunset.
How to use it
- Paste coordinates in any common format: decimal, degrees-minutes-seconds, UTM, or MGRS.
- Read the same point in every other format and copy the one you need.
- Open it in OpenStreetMap or Google Maps to check it.
Privacy & limitations
Everything is converted in your browser; the coordinates are only sent to a map site if you choose to open one.
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Frequently asked questions
What is the difference between DMS and decimal degrees?
They are the same angle written two ways. 48°51′30″ means 48 degrees, 51 minutes, and 30 seconds, where a minute is 1/60 of a degree and a second 1/60 of a minute; in decimal that is 48.858333°. Online maps use decimal degrees, with south and west negative.
What are UTM and MGRS?
UTM divides the world into 60 zones, each 6° of longitude wide, and gives positions in metres east and north within a zone. MGRS, used by NATO forces and search and rescue, writes the same grid more compactly with letters for the 100 km square, such as 31U DQ 48251 11932.
How precise are the conversions?
The conversions themselves are accurate to well under a millimetre. Six decimal places of a degree is about 10 cm, and an MGRS reference with five digits per axis points to a 1 metre square.
Why do my coordinates appear in the wrong place?
The most common mistakes are swapping latitude and longitude, or leaving off a minus sign or W or S. Latitude comes first and runs north–south from −90 to 90; longitude second, from −180 to 180.
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