Open the health application
First, please click to open the "Health" application on the iPhone screen, as shown in the figure.
Setting of walking distance unit
In my health, the current walking distance is displayed in miles. Click the "Walking+Running Distance" icon to enter the detailed setting interface, and you can see the company's setting options.
Set to kilometers
Next, we can set the distance unit to "kilometers", as shown in the figure.
View setting results
When you return to the walking distance icon later, you can see that it is displayed in kilometers.
system upgrade
If you find that this setting option is not available in your health application, please upgrade the system on iPhone to the latest version.