I have a bunch of files with coordinates in UTM form. For each coordinate I have easting, northing and zone. I need to convert this to LatLng for use with Google Map API to
There is a perl module via CPAN called Geography::NationalGrid which can convert easting/northing to lat/longs. That may help.
Alternatively there are lots of scripts on the movable-type site that let you convert lat/long and easting/northings.