Miscellaneous
Latitude/Longitude Format Converter: DD, DMS, DDM
Convert coordinates between Decimal Degrees (DD), Degrees Minutes Seconds (DMS), and Degrees Decimal Minutes (DDM). Runs entirely in your browser.
| Decimal Degrees (DD) | 40.712800, -74.006000 | |
| Degrees Minutes Seconds (DMS) | 40°42'46.08"N, 74°0'21.60"W | |
| Degrees Decimal Minutes (DDM) | 40°42.7680'N, 74°0.3600'W |
Coordinate position (equirectangular grid)
Latitude (DD)
40.712800
Longitude (DD)
-74.006000
Lat DMS
40° 42' 46.08" N
Lng DMS
74° 0' 21.60" W
Coordinate format comparison
| Format | Abbreviation | Example | Common use |
|---|---|---|---|
| Decimal Degrees | DD | 40.7128, −74.0060 | Web maps, GIS software, most APIs |
| Degrees Minutes Seconds | DMS | 40°42'46"N, 74°0'21"W | Traditional surveying, aeronautical charts |
| Degrees Decimal Minutes | DDM | 40°42.768'N, 74°0.360'W | Marine navigation, many GPS devices |
Reference points
- Greenwich, UK (Prime Meridian): 51.4779° N, 0.0015° W
- Equator / Prime Meridian intersection: 0° N, 0° E (Gulf of Guinea, off West Africa)
- North Pole: 90° N (any longitude)
- South Pole: 90° S (any longitude)
Datum note
Most modern GPS coordinates use the WGS84 datum (World Geodetic System 1984), which is the standard for Google Maps, OpenStreetMap, and GPS devices. Some older US maps and surveys use NAD27 (North American Datum 1927), which can differ from WGS84 by up to ~100 meters depending on location. When precision matters, always confirm which datum a coordinate set uses.
Latitude/Longitude Format Converter
GPS coordinates are expressed in several different formats depending on the application. This tool converts between the three most common formats instantly.
Supported formats
- Decimal Degrees (DD): The simplest format. Latitude and longitude as plain
decimal numbers:
40.7128, -74.0060. Negative values indicate South (latitude) or West (longitude). - Degrees Minutes Seconds (DMS): The traditional surveying format. Each
coordinate is split into whole degrees, whole minutes, and decimal seconds with a direction
letter:
40°42'46.08"N, 74°0'21.60"W. - Degrees Decimal Minutes (DDM): Used in many GPS devices and nautical
charts. Degrees are whole numbers and minutes are decimal:
40°42.7680'N, 74°0.3600'W.
Accepted input formats
The parser accepts a wide range of notations:
-
40.7128, -74.0060: comma-separated decimal degrees -
40°42'46.08"N, 74°0'21.60"W: DMS with symbols and direction letters -
40°42.768'N, 74°0.36'W: DDM with symbols and direction letters -
40 42 46 N, 74 0 21.6 W: space-separated DMS without symbols