App Icon

OS Grid Reference


If you find this data field useful please consider donating a $1 / €1 / £1 or whatever you can afford to Médecins Sans Frontières (Doctors Without Borders) through my fundraising page:</p><p>This simple data field can be added to any of the sports apps and displays a six figure Ordnance Survey GB Grid Reference followed by 4 figure Eastings and Northings displays which include the compass direction of travel. It is intended to be used for old-school hiking with paper maps when you want to get a rough indication of your current location and direction of travel.</p>


V2.62 - Fix out of memory problem on FR235</p><p>V2.61 - Add support for edge530 edge830 fr245 fr245m fr945 gpsmap66 marqathlete marqaviator marqcaptain marqdriver marqexpedition vivoactive3mlte vivoactive3d</p><p>V2.6 - Add support for d2delta, d2deltapx, d2deltas, edge1030bontrager, edgeexplore, fenix5plus, fenix5splus, fenix5xplus vivoactive3m</p><p>V2.5 - Add support for fr645m,edge130, edge520plus, fr645 + position permissions</p>

Additional Information


This app requires access to:

  • GPS location
  • Approach® S60 Approach® S60
  • D2™ Bravo D2™ Bravo
  • D2™ Bravo Titanium D2™ Bravo Titanium
  • D2™ Charlie D2™ Charlie
  • D2™ Delta D2™ Delta
  • D2™ Delta PX D2™ Delta PX
  • D2™ Delta S D2™ Delta S
  • Descent™ Mk1 Descent™ Mk1
  • Edge® 1000 Edge® 1000
  • Edge® 1030 Edge® 1030
  • Edge® 1030, Bontrager Edge® 1030, Bontrager
  • Edge® 130 Edge® 130
  • Edge® 520 Edge® 520
  • Edge® 520 Plus Edge® 520 Plus
  • Edge® 530 Edge® 530
  • Edge® 820 Edge® 820
  • Edge® 830 Edge® 830
  • Edge® Explore Edge® Explore
  • Edge® Explore 1000 Edge® Explore 1000
  • Edge® Explore 820 Edge® Explore 820
  • epix™ epix™
  • ForeAthlete® 230J ForeAthlete® 230J
  • ForeAthlete® 235J ForeAthlete® 235J
  • ForeAthlete® 630J ForeAthlete® 630J
  • ForeAthlete® 735XTJ ForeAthlete® 735XTJ
  • ForeAthlete® 920XTJ ForeAthlete® 920XTJ
  • Forerunner® 230 Forerunner® 230
  • Forerunner® 235 Forerunner® 235
  • Forerunner® 245 Forerunner® 245
  • Forerunner® 245 Music Forerunner® 245 Music
  • Forerunner® 630 Forerunner® 630
  • Forerunner® 645 Forerunner® 645
  • Forerunner® 645 Music Forerunner® 645 Music
  • Forerunner® 735XT Forerunner® 735XT
  • Forerunner® 920XT Forerunner® 920XT
  • Forerunner® 935 Forerunner® 935
  • Forerunner® 945 Forerunner® 945
  • fēnix® 3 fēnix® 3, quatix® 3, tactix® Bravo
  • fēnix® 3 HR fēnix® 3 HR
  • fēnix® 5 fēnix® 5, quatix® 5
  • fēnix® 5 Plus fēnix® 5 Plus
  • fēnix® 5S fēnix® 5S
  • fēnix® 5S Plus fēnix® 5S Plus
  • fēnix® 5X fēnix® 5X, tactix® Charlie
  • fēnix® 5X Plus fēnix® 5X Plus
  • fēnix® Chronos fēnix® Chronos
  • GPSMAP® 66i GPSMAP® 66i
  • GPSMAP® 66s / 66st GPSMAP® 66s / 66st
  • MARQ™ Adventurer MARQ™ Adventurer
  • MARQ™ Athlete MARQ™ Athlete
  • MARQ™ Aviator MARQ™ Aviator
  • MARQ™ Captain MARQ™ Captain
  • MARQ™ Commander MARQ™ Commander
  • MARQ™ Driver MARQ™ Driver
  • MARQ™ Expedition MARQ™ Expedition
  • Oregon® 7 Series Oregon® 7 Series
  • Rino® 7 Series Rino® 7 Series
  • vívoactive® vívoactive®
  • vívoactive® 3 vívoactive® 3
  • vívoactive® 3 Mercedes-Benz® Collection vívoactive® 3 Mercedes-Benz® Collection
  • vívoactive® 3 Music vívoactive® 3 Music
  • vívoactive® HR vívoactive® HR
Average Rating: (24 Ratings)

Louis Greenfield
12 กันยายน 2562 | Version V2.62

Simply doesn’t work

12 กันยายน 2562, Mark.R.P

Sorry you're having trouble with this. In what way doesn't it work for you? Have you been able to add the data field to an activity screen and if so, what do you see on the display? Please use the Contact Developer link if you'd like help troubleshooting this. If you need a stand-alone grid reference rather than a data-field then you might find the widget more useful.

30 กรกฎาคม 2562 | Version V2.62

Working perfectly now - excellent widget

1 สิงหาคม 2562, Mark.R.P

Thanks Oz... and thanks a million for giving to MSF. I know a generous donation like that makes a big difference to the charity... much appreciated!!

17 กรกฎาคม 2562 | Version 2.61

Same situation as Tom Barkas on July 14 - great widget but it stopped working a couple of weeks ago unfortunately. I have a Forerunner 235 on software version 8.00 (add1891). Hope you can help - thanks!

18 กรกฎาคม 2562, Mark.R.P

Hi Oz Thanks for the info... Looks like the last update exceeded the memory requirements for the FR235. I rejigged the code and it should be running again now. Sorry for the inconvenience. (If you find this data field useful please consider donating to Médecins Sans Frontières (Doctors Without Borders) through my fundraising page:

Tom Barkas
14 กรกฎาคม 2562 | Version 2.61

Had this working as Field 4 and I’d have given it 5 stars, but now only shows IQ!. Tried to contact developer, but it gives an Error message each time

17 กรกฎาคม 2562, Mark.R.P

Hi Tom, I'm investigating... Any chance you could tell me which device and software version you're using please? Hopefully you can get through to me via the "Contact developer" link on the datafield info page. If not please update your review. Thanks.

Paul Mansell
6 พฤษภาคม 2562 | Version 2.6

brilliant app but i cant get access to the widget. i have downloaded it via garmin express, transferred it to the garmin 935 but cant find it on the watch. can anyone help - about to head to skye and the grid would be very useful in the mountians there. Thanks Paul

5 มิถุนายน 2562, Mark.R.P

Hi Paul, sorry for the slow response. I've just released a new version of the widget with support for the 945. Hope that helps. Regards, Mark

2 พฤษภาคม 2562 | Version 2.6

This is a great app but needs to work with the Garmin 945.

Alex Costello-Bromwich
21 มกราคม 2562 | Version 2.6

Hi mate can you do a step by step guide to enable mgrs

21 มกราคม 2562, Mark.R.P

Hi Alex The OS Grid Reference data field can't display MGRS - it's only for UK Grid References. I've got a widget that does do MGRS here: But if you need a data field that to use in activities then someone else has developed a MGRS data field here: Hope that helps Cheers Mark

30 ธันวาคม 2561 | Version 2.6

I'm also having the old fix location unknown problem and it's only started recently. Haven't been able to fix it. Was great until now!

3 มกราคม 2562, Mark.R.P

Hi Amanda Sorry to hear that. The app is displaying the GPS status as reported by the watch's operating system, so to fix this we need to understand why the watch is not refreshing the location more frequently. As I mentioned below this can be caused by using a power-saving mode like UltraTrac which deliberately takes a long time between GPS refreshes, or (less likely) it can be because the watch hasn't managed to get a good fix because it can't get a clear view of the sky. It's worth checking your GPS settings and if that doesn't help then feel free to use the "Contact Developer" link to get in touch directly. If you do resolve the problem by changing your settings please consider updating your review to let other people know what you changed. Best regards, Mark

27 พฤศจิกายน 2561 | Version 2.6

Installed the app but it cycles through "GPS:Oldfix" and then the grid references, is there a patch which removes "GPS:Oldfix"?

28 พฤศจิกายน 2561, Mark.R.P

The "Oldfix" message means that the device's operating system has described the GPS signal quality as "QUALITY_LAST_KNOWN:- The Location is based on the last known GPS fix". Garmin don't say what this means in terms of metres accuracy but the positional accuracy should be treated with caution... don't navigate along a cliff edge in a whiteout using only your device!! You can usually get rid of this message by turning on an activity and leaving the device with a clear view of the sky until it has calculated a good position. This can take some time if you've significantly changed location since your last good GPS position, or haven't used the device for a while. If that doesn't work try checking your GPS settings. Some GPS power saving modes on the device (like UltraTrac) might cause the OS to report this. If this is the case then you may wish to change the display time settings for this data field (in the phone app) so that the GridRef stays on screen for longer and the message appears for relatively less time. I hope this helps. Mark

Darren Stott
13 พฤศจิกายน 2561 | Version 2.6

Hi great addition to the watch, how do I change from a 6 fig grid to and 8 fig? Many thanks

15 พฤศจิกายน 2561, Mark.R.P

Hi Darren, you can change the grid reference precision on the settings screen in the Garmin Connect mobile phone app. To do that, go to the menu in the Garmin Connect mobile app, click on Garmin Devices, select your device, click on Connect IQ Apps, click Data Fields, select the Grid Reference data field and then click Settings. From the next screen you'll be able to select the precision. I hope that helps (and feel free to click "Contact Developer" on the app details screen if it's not working for you). Best regards, Mark.

1 สิงหาคม 2561 | Version V2.5

Afternoon, I have bought a fenix 5 and I'm after putting the grid coordinates on my watch, can I have a step by step guide on how to add the data fields please or be pointed in the direction of a manual to explain it? Once done I will upgrade to great as I'm sure it is!

2 สิงหาคม 2561, Mark.R.P

Hi Craig, I can't contact you directly but please take a look at the instructions in the reply to Greg Morales' review a bit further down the page, and if that doesn't work then please drop me a note through the "Contact developer" link.

Oliver Glyn-Jones
27 มิถุนายน 2561 | Version V2.5

How do I see the grid ref on my Forerunner 235? I have downloaded the app but cannot find it on the watch. Thanks

27 มิถุนายน 2561, Mark.R.P

Hi Oliver take a look at the reply to Greg Morales a couple of reviews down, and if that doesn't work then please drop me a note through the "Contact developer" link.

9 มีนาคม 2561 | Version 2.4-upd3

So I added this app to a data field for doing hikes but it keeps telling me unknown location and GPS: Old fix. I just want an 8 digit grid coordinate can someone help me fix this?

Greg Morales
2 ตุลาคม 2560 | Version V2.3-upd

Ok I just got the fenix 5x and downloaded this mgrs app, now I have no idea how to find it on my watch

3 ตุลาคม 2560, Mark.R.P

Hi, you've downloaded the Grid Ref. data field which is designed to be added to one of the screens in the built in apps. This allows you to get a grid reference while you're recording an activity - for example during a Run or Walk. For example, to add the data field on my Fenix 3 I have to start an activity - e. g. "Run" , then press the menu button, go to Settings - Current App - Data Screens and I can add the Grid Ref field from the "ConnectIQ" section. I hope that works for you, if you'd prefer to check a Grid Ref when not executing one of the built-in activity apps then you might want to try the Grid Ref widget instead - see: This allows you to quickly check the grid ref when you're cycling through the widgets (alongside the weather, music controls etc.).

24 สิงหาคม 2560 | Version V2.3-upd

Fantastic addition. Thanks

Steven Bridger
6 กรกฎาคม 2560 | Version V2.3

How do I use it for the viroactive hr as having trouble

16 สิงหาคม 2560, Mark.R.P

Hi, hopefully you got this sorted now but if you're still struggling then send me a message and I'll talk you through how to add a data field to the built in apps.

3 เมษายน 2560 | Version V2.3

I like to have Lat/Long and UK grid on the same face so after updating to a Fenix 5, this data field was a must. I contacted Mark and he updated the field straight away. Thanks again... Steve.

7 มิถุนายน 2559 | Version V2.2

Fantastic little data field highly useful in the walk app on the hills in UK to quickly get a location rather than resort to compass and map all the time. Also really helpful discussion with the developer to a couple of questions I had and some guidance.

Christopher Capon
28 พฤษภาคม 2559 | Version V2.2

Fantastic app. Suprisingly useful when checking location or confirming a location. Just been using it to log Trig points in Derbyshire. Fab and works very well every time.

4 มีนาคม 2559 | Version 2.10

Just updated to the latest version, and even better, with choice of displays - many thanks for the improvement

25 กุมภาพันธ์ 2559 | Version 1.2

Many thanks for providing this - finally my GPS can tell me where I am !! Similar to other review, if I was being picky, then would prefer just a fixed display rather than scrolling, 6 digits more than enough

2 กุมภาพันธ์ 2559 | Version 1.1

Very useful addition to the 920XT. Might be useful to have the option of a fixed display (6 or 8 digit) rather than alternating - but that's being picky! It means the triathlon watch can be a backup nav aid on my hikes (and runs) now.

Rob Turner
12 มกราคม 2559 | Version 1.1

Thanks for adding this. it was nice to be able to get a UK grid on the 310XT, really surprised Garmin missed it off the fenix. Essential data if you're lost or need to let mountain rescue know where you are.

Charlie Wartnaby
28 ธันวาคม 2558 | Version 1.1

I'm hugely grateful that you've written this. Having an OS grid reference to correlate with a paper map is terribly useful in the UK, when hiking especially. And displaying the last known location if GPS lock is lost (and clearly showing that) is a big improvement on the built-in "Where Am I?" feature which does not show the location at all without GPS lock. (In fact the 920XT is currently pretty poor at explaining whether it has a GPS fix and what quality at all, so your display of that information is handy even without the coordinates.) (Now as I understand it, if only Garmin would support persistLocation() on the 920XT, we could also have something that actually allows one to save a new waypoint for some location other than where one is already standing! And optionally in OS grid format, using your nice conversions.)

Sorry, no statistics available yet.