Convert Lat/Long to MGRS

Enter a decimal latitude and longitude to get the MGRS (Military Grid Reference System) grid reference. MGRS divides the Earth into 6° by 8° grid zones and then into 100km squares and metric sub-grids down to 1 meter, so one short code identifies a precise square anywhere on the planet.

Enter coordinates above to see the MGRS reference.

How to use it

  1. Type the decimal latitude (for example 51.5074).
  2. Type the decimal longitude (for example -0.1278).
  3. Pick the precision you need; the MGRS reference and UTM coordinate update instantly.
  4. Copy the result with the Copy button.

Frequently asked questions

How do I convert latitude and longitude to MGRS?

Enter the decimal latitude and longitude, then choose a precision level. The MGRS grid reference appears immediately; no button press needed.

Is this converter free?

Yes. No login, no fee, no upload. The conversion runs entirely in your browser.

What precision levels are available?

100km, 10km, 1km, 100m, 10m, and 1m. The default is 10m, which suits most planning work.

Need the reverse? Convert MGRS to lat/long. Or see the whole grid on a map with the free MGRS grid overlay tool. New to grid references? Read the map grid references guide.