By default, Google Maps scale is displayed at the bottom right of the map in kilometers (or meters at close range), as shown in the diagram below.
If you want to see the Google Maps scale in miles (or feet), you’ll need to click on the scale to switch between kilometers and miles. This is okay once in a while, but can become irritating if you have to do it all the time for your maps.
We’ve added a new customization where you can specify that you want the scale in miles for your map.
To change this setting, use the Map -> Settings menu to go to the settings page on your map menu. Then, click on the Map Display tab, check the box for Use “Miles” scale control, and hit Save Changes. Go back to your map and the scale should now be in miles instead of kilometers.