MGRS Grid Overlay
MapGridder overlays a live MGRS (Military Grid Reference System) grid on an interactive map, so you can read a grid reference for any point as you pan and zoom. MGRS divides the Earth into 6 degree by 8 degree zones, then into 100km squares and metric sub-grids down to 1 meter, giving one short code for a precise square anywhere on the planet.
What you can do
- Live MGRS grid that stays aligned while you pan and zoom
- Precision from 100km squares down to 1 meter
- Grid-square labels for fast cell referencing
- Works on desktop and mobile, nothing to install
Frequently asked questions
What is an MGRS grid overlay?
It is a grid drawn on top of a map using the Military Grid Reference System. Each line marks an MGRS boundary, so you can give or read a grid reference like 30U XC 9931 1016 directly from the map.
Is the MGRS grid overlay free?
Yes. It runs in your browser with no login, no install, and no fee.
How accurate is the grid?
You can set precision from 100km squares down to 1 meter. At 1m precision a reference pinpoints a single square meter.
Can I use it on my phone?
Yes. The map and grid work in mobile browsers, and the grid redraws as you pan and zoom.
Can I use the MGRS grid for milsim or airsoft?
Yes. The MGRS grid suits milsim and airsoft well: call out objectives and rally points by grid square, coordinate fire-team movements, and keep the whole element on one reference. Pair it with tactical symbols to mark units and control measures.
How do I read an MGRS grid reference?
Read the grid zone and 100km square first (for example 30U XC), then the easting and northing digits. More digit pairs mean finer precision, from a 100km square down to a single meter.
Does the grid work offline?
The grid math runs in your browser, but the basemap tiles load over the network, so an internet connection is needed to see the map underneath.
Related: Map grid references guide · Convert lat/long to MGRS · Tactical map symbols · Free MGRS grid overlay guide