Find British National Grid Reference From Map

Tool to find the British national grid reference from a map.

Options and Output

Output NGR for Ireland?


Click on the map anywhere in Britain (Scotland, England and Wales). You will then see the Northings, Eastings and National Grid Reference (NGR) below the map. If you wish to find the NGR from Ireland, make sure to tick on the option "Output NGR for Ireland?".


How to convert latitude and longitude to a British National Grid Reference.

Google Maps API

Version History

Previous Comments For This Page

Its free and ok for my survey work.
On 12/07/2014

its not very good
On 03/04/2014

By f on 19/01/2014

Many comments stated this is off, one stated by about 100m. If so, then this may be the error: the lat-lng values returned by Google Maps is WSG84-based. But the input to the cited formula should be lat-lng that is Airy1830-based. That conversion might be missing in this tool.
By dharasty on 24/10/2013

UK National Grid
By lulu on 22/07/2013

This is such an awesome map to use to locate and find things. I live in New Zealand , and its good to see another country has such detail on my countries features.
On 12/06/2013

Whenever I try to find the grid reference the blue thingymabob keeps going to Ukraine !!!!!!!! Helpfull but frustrating
On 16/02/2013

not bad at all , postcodes would be a good addition , zoom in on a point and get its postcode
By steve on 08/02/2013

As others have said this is inaccurate! Do not use it if you need a true grid reference. Use an OS Explorer map instead. A great shame.
By Edgar Iredale on 25/04/2012

This is inaccurate! See the grab a grid page at There you can check it against the OS map and its grid lines.
On 03/04/2012

I thought this used to have a search facility. How annoying that it has gone. If there are better tools I will change to them.
On 23/03/2012

Agree with previous comment, for instance 10 Downing Street is shown at TQ 29938 79991 but in reality it is closer to TQ 30040 79918
On 09/01/2012

A search function would be useful, a reverse function would be useful, the northings and eastings are out by at least 100m in places. Useful tool but there are better out there.
On 09/01/2012

Brilliant page. Just what I needed, thanks!
On 05/01/2012

Fantastic...just what I needed. Saved to favourites straight away.
By Martin Buckland on 04/01/2012

Thanks for this useful tool. It is great for finding coordinates for post codes that are not in OS Code Point Open (when they really should be!).
By Chris Hills (National Grid) on 15/12/2011

In invaluable web site service given for free, what's not to be grateful for. Thank you very much, I use this regularly, keep up the good work! :)
By Kevin on 24/11/2011

I want to find a particular house to get the reference for that for insurance purposes, and this won't let you do that
By Alison on 14/11/2011

By Jack Manuel on 19/09/2011

Very clever and useful but as Dixdean commented, be careful for accurate measuring, it is out by around 100 metres
On 08/08/2011

Showing the most recent 20 out of 39 comments. Click to see all the comments.

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