Grid Reference Converter

This script will convert an OSGB National Grid Reference to Latitude and Longitude using WGS84 datum.

Please enter the Grid Reference in 2-letter 6-digit (eg ST156781), 2-letter 8-digit (eg ST15557812) or 10-digit (eg 3155517812) format:

Lat, Lng: 51.495690, -3.217900

Note: This script will give incorrect results for NG Refs in Ireland, N. Ireland and the Channel Islands