Google Maps is a free resource you can use to get driving, public transit or walking directions between any two points on the globe. This tool is available from your computer and mobile devices such as smartphones and tablets. By default, distance units are based on your current location. You can, however, convert Google Maps settings to display distances in kilometers (KM) instead of miles.
Change Google Distance Units
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If you're accessing Google Maps from a computer or using the browser on your mobile device, use it to get directions from one point to another. Under the locations, click "Route options" and select "km" under Distance Units. If you're using the Google Maps app on your iPhone or Android mobile device, access Settings and tap "Distance units." Tap "Kilometers" to change this setting.