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The Unit of Measure for Activities That Are Shared on Social Channels Vary
When viewing shared activities, the activity will load on your computer in whichever units of measurement that is set up in your Garmin Connect™ account. If you do not have a Garmin Connect account or are not logged in, it will display in the units set by the Connect user who originally uploaded the activity.
Change Garmin Connect Unit of Measure Setting
From a web browser sign into your Garmin Connect account.
Select the circular Profile icon in the upper right corner.
Select Account Settings.
Select Display Preferences (left-side).
Change Measurement Units to preferred setting from drop down list.
The units of measurement will now be in the preferred settings for all activities, courses and workouts viewed in Garmin Connect when you are logged in to your account.