Distance Between OS Grid Coordinates

This tool can be used to find the distance between OS Grid Coordinates in the UK. Type in the two OS Grid Coordinates and click the Show button.

[11th July 2018] Unfortunately, due to a large price increase in back-end services, we can no longer offer some features on this page.

Map Showing the Distance Between Two OS Grid Coordinates

Click Here To Load The Map


OS Grid Ref 1 OS Grid Ref 2


Measure in : miles km meters
Distance as the Crow Flies : As the crow Flies
Distance by Land Transport : Land Transport

Bulk Processing

Use the text box below to input bulk grid references and find the 'as the crow flies' distances between them. There is a limit of 200 pairs at a time. Add them in the format OS Grid Ref1,OS Grid Ref2 per line. Once processing is complete, the distance is appended as a 3rd column on the CSV list. You can toggle the units (miles/km) using the switch above.

 Process List 

How to Use The Distance Between OS Grid Coordinates

Type in the first and second grid references then click the Show button. The map will then display the location of the two points and also show the routes for:

  • As the crow flies - the straight distance between the points
  • By land transport - by car and/or boat

You will also see the distance displayed below the map for the distance as the crow flies and also by land transport. You can then type in more paths and click the show button to see more distances.

Uses of This Tool

This tool has a wide range of possible uses from point to point measurement to hiking. If you know of a useful application of this tool, let us know.

Version History

  • 8th April 2018 - Click/Tap on the map to find the OS Grid Reference
  • 8th August 2017 - Click/Tap on the map to find the X/Y Easting Northing
  • 2nd June 2017 - Page created

Relevant Links

Google Maps API

About OS Grid Reference

Comments For This Page

Hi Mike, it uses Great Circle distances.
By Free Map Tools on 24th April 2019

That looks great. I%u2019ll try it. Does it take into account the curvature of the earth and the fact that the lines of longitude get closer towards the north. Or is it just Pythagoras? Thanks.
By Mike on 23rd April 2019

David, thanks for the comments. It has now been added.
By Free Map Tools on 8th April 2018

Brilliant! It is rarely necessary to know the straight line distance HOWEVER the secondary tool of providing OS grid for any point clicked is wonderful (and accurate compared to me on the ground gadget. Is it poss to give the output in more digestible SE8526693596 format. Thanks (and thanks even if you can't!)
By David Martin on 8th April 2018

Jonathan, this has just been added so it appears when you click/tap on the map.
By Free Map Tools on 8th August 2017

Hi, Love your tools. Is it possible to click on the map yo generate xy/grid ref? If so. I haven't found it yet. Cheers.
By Jonathan on 7th August 2017

Richard, thanks for the comments. Please do share this page and also let us know if you have any suggestions for improvements.
By Free Map Tools on 2nd June 2017

That's really cool, thank you for doing the work !!!! We are going walking this weekend and will have a go. Also, with your permission, I'll send it to the teacher who trains the Ten Tors Teams at my daughters school so they can plan training - do you mind if they spread it around?
By Richard Dormer on 2nd June 2017

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