397 miles in kilometers

Conversion formula
How to convert 397 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: 397 ⁢ mile = 638.909568 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 0.00156516673107641 times 397 miles.

It can also be expressed as: 397 miles is equal to $\frac{1}{\mathrm{0.00156516673107641}}$ kilometers.

Approximation

An approximate numerical result would be: three hundred and ninety-seven miles is about six hundred and thirty-eight point nine zero kilometers, or alternatively, a kilometer is about zero times three hundred and ninety-seven miles.