- Open the Withings App.
- Go to Profile.
- Tap Settings (Gear icon at the top-right corner of the screen) > Units.
- Select the units you want.
https://support.withings.com/hc/en-us/sections/6216033813649-Withings-App-Android
https://support.withings.com/hc/en-us/sections/200501778-Tutorials