• On your computer, open Google Earth.
• Search for a place, or select a location on the globe.
• On the left, click Measure. . ...
• Click the map to set measurement points.
• To remove a point, on the right, click Undo .
• To complete your line measurement, double-click on your last point, or click Done.
On the right, you’ll see the length.
EDIT YOUR MEASUREMENT:
When you finish adding points, to edit your line segments or shape, click and drag the points.
To measure again, on the right, click Start New.
To delete your measurement and go back to the map, on the right, click Close