1 kilometer = 0.621371 miles. Whatâs interesting is Fibonacci numbers (0,1,1,2,3,5,8,13,â¦) match up neatly with mile to kilometer conversions. For example, 3 miles is 5 kilometers, 5 miles is 8 kilometers, and so on. Agreed they are more approximations that accurate conversions, but itâs really fun to see how Fibonacci sequence can be applied to so many things in life!