MGRS Converter
Convert MGRS strings to latitude/longitude (decimal and DMS) or convert lat/lon back to MGRS with adjustable precision — all in the browser.
MGRS String
Spaces are ignored automatically.
Quick Examples
Enter an MGRS string and click Convert to Lat/Lon.
Lat/Lon Result
Latitude (decimal)
Longitude (decimal)
DMS Format
Geographic Coordinates
Range: -90 to 90 (negative = South)
Range: -180 to 180 (negative = West)
Quick Examples
Enter coordinates and click Convert to MGRS.
MGRS Result
MGRS String Components
A number (1–60) for the 6-degree longitude band, plus a letter (C–X) for the 8-degree latitude band.
Two letters identifying a 100 x 100 km square within the grid zone. Easting letter then northing letter.
Distance in meters east from the left edge of the 100 km square. Length determines precision (1–5 digits).
Distance in meters north from the bottom edge of the 100 km square. Same digit count as easting.
Example: 33T WN 00000 00000 = Grid Zone 33T, 100 km square WN, easting 00000 m, northing 00000 m (1 m precision).
Summary
Convert MGRS strings to latitude/longitude (decimal and DMS) or convert lat/lon back to MGRS with adjustable precision — all in the browser.
How it works
- Select the "MGRS to Lat/Lon" tab to decode an MGRS string.
- Type or paste an MGRS string such as "33TWN0000000000" or "4QFJ1234567890".
- Click Convert to see the latitude and longitude in both decimal degrees and DMS format.
- Switch to the "Lat/Lon to MGRS" tab and enter decimal-degree coordinates.
- Choose a precision (1 m, 10 m, 100 m, or 1 km) and click Convert to get the MGRS string.
- Use the Copy button to copy any result to the clipboard.
Use cases
- Decode MGRS grid references from military maps into GPS-friendly coordinates.
- Convert lat/lon waypoints from GPS devices into MGRS for field operations.
- Cross-check MGRS coordinates with other mapping tools.
- Teach or study military grid reference notation and its components.
- Integrate MGRS coordinate lookup into field-planning workflows.