For different tasks in life, converting mile to kilometer is required. Actually, kilometer is the unit recognized by international authority which is responsible for deciding the acceptable units. These units are part of the system called System International (SI). However, the unit mile so much back in to human history, that it is not very easy to quit using it altogether. That is why you see mile unit present with kilometers in places like automobiles' speedometer. Also, the marathons are also measured in miles rather than kilometers, reason again is the same. Marathons are prehistoric events and goes way back to Greek and Roman Empire's era. Marathon was a part of historical Olympics. When the modern Olympics started way back in 1896, the marathon event was among the sports categories that were automatically inserted in the list of games.

It is not exactly rocket science to convert mile to kilometers, if situations demands such kind of conversion. Because of involvement of fractions, it is imperative to use the calculator to do the calculations. Any person, who can solve a simple algebraic expression, can easily do the conversion of mile to kilometer job. First we need to see the equation given below, that is required for conversion,

1 mile = 1.609344 kilometer

Now, if you need to convert any amount of miles in to equivalent value in kilometers, you need to work out on the equation given above. For instance, if you need to convert 15 mile in to kilometers, you need to multiply the both sides of the equation with 15. After multiplying both sides of the equation with 15, our equation becomes,

15 x 1 mile = 15 x 1.609344 kilometer

Solving the equation, we get the following result,

15 mile = 24.14016 kilometer

Now, doing it other way around, meaning converting kilometer into mile is also very simple and requires a little modification to the same equation. We need to write the equation that we used for converting mile in to equivalent value in kilometers by dividing both sides by 1.609344. So the equation now becomes,

(1/1.609344) mile = (1.609344/1.609344) kilometer

Solving the equation, we get the following result,

0.6213 mile = 1 kilometer

This equation could also be written as,

1 kilometer = 0.6213 mile

Now, we just need to do the same thing for conversion. To confirm, if our previous conversion was right, we convert 24.14016 kilometer into its mile value, by again using the calculator.

24.14016 x 1 kilometer = 24.14016 x 0.6213 mile

Solving the equation, we get the following result,

16.09344 kilometer = 14.998281408 mile =~ 15 mile.

So, we can see the equation works both ways and any amount of miles or kilometers could be converted into counterpart unit.