13 miles in kilometers

Conversion formula
How to convert 13 miles to kilometers?

We know (by definition) that: $1\mathrm{mile}=1.609344\mathrm{km}$

We can set up a proportion to solve for the number of kilometers.

Now, we cross multiply to solve for our unknown $x$:

Conclusion: 13 ⁢ mile = 20.921472 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 0.0477977840182565 times 13 miles.

It can also be expressed as: 13 miles is equal to $\frac{1}{\mathrm{0.0477977840182565}}$ kilometers.

Approximation

An approximate numerical result would be: thirteen miles is about twenty point nine two kilometers, or alternatively, a kilometer is about zero point zero five times thirteen miles.