Convert British National Grid (BNG) formerly known as the National Grid Reference (NGR) to latitude and longitude (lat/long) or vice versa.

See Using the National Grid from the Ordnance Survey for an explanation of how the BNG works.

Convert BNG to lat/long

Enter a British National Grid six figure number for both easting and northing to return decimal latitude and longitude.

Convert lat/long to BNG

Enter decimal latitude and longitude to return a six figure number of the British National Grid.

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