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

Easy to use and seems accurate
By Terry Smith on 18/03/2015

Complete and utter waste of time, the Easting/Northing references are MILES out.
On 02/02/2015

I think the calculations are not correct. I have compared the output from your map with 2 independent maps. Memory Map with OS-Maps from 2014 and UK maps with OS Maps (a free tool for iPad). The oucome is not huge, but at least a few 100 yards. However I think this is a brilliant tool and very good made. Just a slight calculation error in the NGR values ;-)
By Axel on 21/01/2015

This is pathetic
By Hwdchu on 04/11/2014

with reference to the map,is the movements voluntary of forced?substantiate your argument by mentioning three factors from the map and other factors to support the type of migration you mentioned.
By Reginald shuping on 18/08/2014

No. Detail to maps. NGR are not accurate only approx
By Alun on 02/08/2014

Accurate to 100m is fine for me! Great free tool if you don't need a pro level accuracy - and if you need pro accuracy, you should be prepared to pay.
By Grateful, England on 28/07/2014

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

Showing the most recent 20 out of 46 comments. Click to see all the comments.

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