420 miles in kilometers

Conversion formula
How to convert 420 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: 420 ⁢ mile = 675.92448 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 0.0014794552196127 times 420 miles.

It can also be expressed as: 420 miles is equal to $\frac{1}{\mathrm{0.0014794552196127}}$ kilometers.

Approximation

An approximate numerical result would be: four hundred and twenty miles is about six hundred and seventy-five point nine one kilometers, or alternatively, a kilometer is about zero times four hundred and twenty miles.