Enter a grid ref with letters and without spaces (e.g. SP1097, SP105975), up to a maximum of 8 figures.
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 figure grid ref):
Show 100m square (6 figure grid ref):
Show 1km square (4 figure grid ref):
Show 10km square (2 figure grid ref):
Show WGS84 longitude and latitude: