I have a garmin forerunner 245 music
I have a garmin forerunner 245 music
Do you want to see your data in metric units? Switch units on your device: System->Units
There is also a setting in Garmin Connect. I think it is easiest to use the Web interface and it is a lot easier to post a link to the correct page: https://connect.garmin.com/modern/settings
If you want to keep your main units in imperial, you can download data fields that show the opposite unit.
Personally I use the one for distance. Helps me if I want to run an exact fixed km distance and allows me to keep the watch in imperial. Search the Garmin IQ store with the term "opposite" and there's a few opposite data fields by the same dev.