Coordinate Converter

Convert GPS coordinates between Decimal Degrees, DMS, DDM, UTM, MGRS, Plus Codes (OLC), Geohash, and Maidenhead grid. Paste any format, see every other. Includes distance + bearing between two points and a live world map.

Converter Science & Engineering Updated May 23, 2026
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How to Use
  1. Paste any format into the input — decimal degrees, DMS, UTM, MGRS, a geohash, a Plus Code, or a Maidenhead grid.
  2. Every other format renders live on the right. Click any Copy button to grab one.
  3. Toggle "two-point mode" to enter a second coordinate — you get great-circle distance + initial bearing.
  4. Click on the world map to set the coordinate visually.
Point A — paste any format
Paste a coordinate or click the map.
z 4
—
© OpenStreetMap contributors
Point A — every format

Supported formats

Decimal degrees
40.748817, -73.985428
The universal interchange format.
DMS
40°44'55.7"N 73°59'7.5"W
Degrees / minutes / seconds with N/S/E/W.
DDM
40°44.928'N 73°59.126'W
Degrees + decimal minutes. Used in marine + aviation.
UTM
18N 585674 4511322
Universal Transverse Mercator zone + easting + northing.
MGRS
18T WL 84740 06521
Military Grid Reference System — UTM + 100km letter pair.
Plus Code
87G8P27V+RV
Google Open Location Code — works without addresses.
Geohash
dr5regwc6
Interleaved bisection of lat / lng into base32.
Maidenhead
FN30as88
Ham-radio grid locator. 6 or 8 chars.

Frequently Asked Questions

What format should I use?

Decimal degrees (e.g. 40.7488, -73.9857) is the most universal. DMS (40°44'55"N) is human-friendly. UTM/MGRS are common for military/survey work. Plus Codes work without addresses. Geohash is good for storage / clustering. Maidenhead is used in ham radio.

Which datum?

WGS84 (world standard, used by GPS). UTM/MGRS use the same. Local datums like NAD27 or OSGB36 differ by up to ~200m — convert those externally first.

How accurate is the distance?

Haversine formula on a sphere of radius 6371 km. Accurate to about 0.5% over any distance. For survey-grade accuracy use Vincenty's formulae on an ellipsoid.

What's a Plus Code?

Google's Open Location Code — a 10-character grid reference that maps to ~14m precision. Works without street addresses, ideal for remote locations.

Maidenhead grid for ham radio?

Yes — the QTH Locator. 6-char gives ~2.5'×5' precision (about 5km), 8-char gives ~150m. Used worldwide on amateur radio.

Common Use Cases

Mapping / GIS

Convert survey UTM data to lat/lng for web maps.

Aviation / marine navigation

Translate between chart-stated DMS / DDM and decimal degrees.

Geocaching

Decode Plus Codes, geohashes, or DDM clues into lat/lng.

Amateur radio

Convert between Maidenhead grid and lat/lng for QSL cards.

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