Enter a grid ref with letters and without spaces (e.g. SP1097, SP105975), up to a maximum of 8 digits.
Always include the first two letters. A 500m square can be shown by adding "SW", "SE", "NW" or "NE" to
a four digit grid ref (e.g. SP1097NE).
The marker will always settle at an intersection in an OS grid spaced at metres. Grid references are shown below, with correspondingly coloured grid squares on the map.
Show 10m square (8 digit grid ref):
Show 100m square (6 digit grid ref):
Show 500m square (4 digit + 2 letter grid ref):
Show 1km square (4 digit grid ref):
Show 10km square (2 digit grid ref):
Show WGS84 longitude and latitude: