Converting coordinates...
Select a format and enter coordinates to convert between DD, DMS, UTM, and MGRS.
Understanding Coordinate Formats
A coordinate converter is essential for anyone working with maps, GPS devices, GIS software, or surveying data. Different systems express the same location in different ways, and converting between them accurately prevents costly positioning errors. Our tool supports the four most common geographic coordinate formats used worldwide.
Coordinate Format Conversion Cycle
Enter any one of the four formats above and the tool instantly produces the other three.
Decimal Degrees (DD)
Decimal Degrees express latitude and longitude as simple decimal numbers. Positive values indicate North and East, while negative values indicate South and West. This format is the default for most modern GPS receivers, web maps, and APIs because it is compact and easy to parse.
Degrees Minutes Seconds (DMS)
DMS is the traditional format found on paper charts, property deeds, and older navigation devices. Each degree is divided into 60 minutes, and each minute into 60 seconds. While more verbose, DMS remains popular in aviation, maritime, and legal land descriptions.
Universal Transverse Mercator (UTM)
UTM divides the Earth into 60 north-south zones and uses a metric grid for easting and northing values. It is the standard for topographic maps, military operations, and engineering surveys because distances and areas are easier to calculate on a flat grid.
Military Grid Reference System (MGRS)
MGRS is a simplified alphanumeric notation derived from UTM. It adds a latitude band letter and a 100 km square identifier, making it ideal for rapid radio communication, tactical planning, and rapid coordinate sharing.
Common Coordinate Format Reference
| Format | Example | Best Used For |
|---|---|---|
| DD | 40.446200, -79.982300 | GPS devices, web maps, APIs |
| DMS | 40° 26′ 46.32″ N, 79° 58′ 56.28″ W | Charts, deeds, aviation |
| UTM | 17T 586290 4479084 | Surveys, topographic maps |
| MGRS | 17TPE8629079084 | Military, tactical planning |
Related Calculators
Haversine Distance
Calculate great-circle distance and bearing between two coordinates.
MGRS Bulk Converter
Batch convert many MGRS references to latitude and longitude.
Slope & Gradient
Calculate grade, angle, and ratio from elevation change.
Map Scale
Convert map measurements to real-world distances.
External Resources
Frequently Asked Questions
What is the most accurate coordinate format?
All formats can be equally accurate if enough decimal places or digits are used. Decimal Degrees with 8 decimal places locates a point within about 1 millimeter, while a 5-digit MGRS reference is accurate to 1 meter.
Why do UTM and MGRS need a zone number?
UTM splits the world into 60 longitudinal zones to keep distortion low. The zone number tells the converter which central meridian and false easting to use, which is essential for producing the correct latitude and longitude.
Can I convert coordinates near the poles?
UTM and MGRS coverage extends to 84°N and 80°S. For areas beyond those limits, such as the polar regions, UPS (Universal Polar Stereographic) coordinates are used instead.
Does this tool use WGS84?
Yes. All conversions use the WGS84 ellipsoid, which is the datum used by GPS and most modern mapping systems.