Converter Tools
GPS Coordinate Converter
Convert GPS coordinates between Decimal Degrees, DMS, and Degrees Decimal Minutes in your browser. Paste any format, copy every other.
Accepts decimal degrees, DMS, and DDM in nearly any spelling. Use comma, semicolon, slash, pipe, or whitespace to separate latitude and longitude.
Try a sample
Conversion runs entirely in your browser. Coordinates you paste here are never uploaded to a server.
All formats
N 40.446100deg, W 79.982400degDecimal Degrees (DD)
Used by Google Maps, OpenStreetMap, GeoJSON, GPX, ISO 6709, most APIs.
40.446100, -79.982400
- Latitude40.446100
- Longitude-79.982400
- Lat (with hemisphere)40.446100deg N
- Lon (with hemisphere)79.982400deg W
- Space-separated40.446100 -79.982400
Degrees, Minutes, Seconds (DMS)
Used by USGS topo maps, marine charts, and many older atlases.
40deg 26' 45.96" N, 79deg 58' 56.64" W
- Latitude40deg 26' 45.96" N
- Longitude79deg 58' 56.64" W
Degrees Decimal Minutes (DDM)
Used by Garmin handhelds, marine GPS, and aviation flight plans.
40deg 26.766' N, 79deg 58.944' W
- Latitude40deg 26.766' N
- Longitude79deg 58.944' W
Other formats and links
GeoJSON Point
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
-79.9824,
40.4461
]
},
"properties": {}
}WKT Point
POINT(-79.982400 40.446100)
ISO 6709 string
+40.446100-79.982400/
External map links open in a new tab. Your coordinate is included in the URL only when you click a link.
Format guide
- Decimal Degrees (DD) uses one signed number per axis. Latitude is positive in the northern hemisphere and negative south of the equator. Longitude is positive east of the prime meridian and negative to the west.
- DMS splits the value into whole degrees, whole minutes (1/60 of a degree), and seconds (1/60 of a minute) plus an N/S or E/W hemisphere letter.
- DDM keeps the degrees and minutes parts but expresses the seconds as a fractional minute. Many handheld GPS units default to this format.
- Precision at the equator: 6 decimal places of DD is about 11 cm. 5 places is about 1.1 m. 4 places is about 11 m. 3 places is about 110 m.
How to use
- Paste a coordinate in any format (DD, DMS, or DDM) into the input area, or switch to the Type lat / lon tab and fill in two decimal numbers.
- Pick a decimal precision from 1 to 9 places. Six is the default and is accurate to about 11 cm at the equator.
- Read the converted output below in all three formats at once, with copy buttons next to each form.
- Use the Swap lat and lon button if you pasted longitude first by mistake, or click Open in Google Maps to verify the result on a real map.
About this tool
GPS Coordinate Converter rewrites a single latitude / longitude pair between the three formats people actually paste at each other. Decimal Degrees (DD) is the format Google Maps, OpenStreetMap, GeoJSON, GPX, and almost every modern API accept; Degrees Minutes Seconds (DMS) is what USGS topographic maps, marine charts, and old atlases print; Degrees Decimal Minutes (DDM) is what Garmin handhelds and most marine and aviation GPS units default to. Paste any format on the input field and the tool detects the structure: degree, minute, and second symbols are normalized down to a small alphabet, hemisphere letters (N, S, E, W) are extracted no matter where they sit, and signed numbers are matched up so south and west yield negative DD values. Validation enforces the standard ranges (latitude in -90 to 90, longitude in -180 to 180, minutes and seconds in 0 to 60) and raises clear errors for out-of-range values instead of silently clamping. Output is rendered in every other format at once with copy buttons next to each, plus signed and hemisphere-prefixed variants of DD, a space-separated DD pair for spreadsheets, a GeoJSON Point, a Well-Known Text (WKT) Point, and an ISO 6709 string ready for an EXIF GPSCoordinate field. Direct links open the same point in Google Maps, OpenStreetMap, and Bing Maps. The decimal precision selector goes from 1 to 9 places (about 11 km down to 0.11 mm at the equator) and applies to every output simultaneously, so a value round-trips between DD, DMS, and DDM cleanly. Useful for geocoding spreadsheets where some rows came from an iPhone and others from a Garmin, building waypoint lists for hikes, transcribing coordinates from a field notebook into a CMS, sanity-checking surveyor reports, and any time you have lat / lon in one format but need it in another.
Free to use. Works in your browser. No signup, no login.
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