Coordinate Converter
Paste any coordinate, get every format. Decimal degrees, DMS, UTM, MGRS, Geohash and Plus Codes in one table. All in your browser.
One per line. Decimal pairs are read as latitude, longitude. Auto-detects format. Label with Name | coords.
Supported coordinate formats
Decimal Degrees
40.7128, -74.0060 (lat, lng)
The web mapping default. We accept either order via hemispheric letters (e.g. N40.71 W74.00) and always output latitude, longitude.
DMS
40°42'46"N 74°00'21"W
Degrees, minutes, seconds. The classic format on nautical charts and aviation documents.
UTM
18T 583959 4507351
Universal Transverse Mercator. Projected coordinates in metres, used by surveyors and military.
MGRS
18TWL8395907350
Military Grid Reference System. A compact alphanumeric grid used by NATO and emergency services.
Geohash
dr5regw3p
A short base32 string used for spatial indexing in databases like Elasticsearch and Redis.
Plus Codes
87G7PX7V+4H
Google's Open Location Code. A short shareable identifier that works without street addresses.
How it works
Paste any format
Drop one coordinate or a list. Mix formats freely. We sniff each line and pick the right parser automatically.
See every format
Each input row turns into one output row with all six formats side by side. Add a label with the Name | prefix.
Copy or download
Click any cell to copy. Use the row button for tab-separated paste into Excel. Download the whole table as CSV.
Who uses this
Marketers and analysts
Got a CSV of customer addresses geocoded as lat/lng but your vendor map needs Plus Codes? Paste, copy column, paste into your spreadsheet.
Field teams and surveyors
Convert MGRS grid references from a paper map to UTM eastings and northings for survey equipment, or back to decimal degrees for GPS export.
Journalists and researchers
Verify coordinates in a public records release, cross-reference UTM-based incident reports against a Google Earth pin, or normalise mixed-format datasets.
Developers and engineers
Generate Geohashes for database indexing, MGRS for tactical apps, or sanity-check a coordinate transformation in your own code without spinning up proj4.
Frequently asked questions
Are my coordinates sent to a server?
No. Everything runs in your browser using JavaScript. We never see your data and there is no upload.
Is the order latitude, longitude or longitude, latitude?
Decimal pairs are read as latitude, longitude (the order used by Google Maps, GPS readouts and most spreadsheets). If your data is in the opposite order (the GeoJSON / web mapping order: longitude, latitude) you have two options: swap the columns before pasting, or use hemispheric letters like N40.71 W74.00 which removes the ambiguity. Outputs always use latitude, longitude.
How accurate are the conversions?
Decimal degrees are shown to 6 decimal places (about 11 cm). UTM uses proj4 with the WGS84 datum. MGRS is rounded to 5-digit precision (1 metre). Plus Codes are full 10-character codes (about 14 metres). Geohash precision is configurable from 6 to 12 characters.
How many coordinates can I convert at once?
Up to 10,000 rows in a single batch. Conversion is instant for most inputs. Above 5,000 rows you may notice a small delay while the table renders.
Why is the UTM column blank for some rows?
UTM only covers latitudes from 80°S to 84°N. Points in the polar regions fall outside its grid and use the Universal Polar Stereographic (UPS) system instead, which we do not yet support.
Do you support what3words?
Not yet. what3words requires an API call and a vendor key, which would break our privacy promise. We may add an optional bring-your-own-key option in a future release.
Can I reproject a whole geo file between coordinate systems?
Yes. Use our file reprojection tool to transform GeoJSON, Shapefile, KML and other formats between WGS84, Web Mercator, UTM zones, State Plane and more.