31 kilometers in miles

Conversion formula
How to convert 31 kilometers to miles?

We know (by definition) that: $1\mathrm{km}\approx 0.62137119\mathrm{mile}$

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

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

Conclusion: 31 ⁢ km ≈ 19.262506889999997 ⁢ mile

Conversion in the opposite direction

The inverse of the conversion factor is that 1 mile is equal to 0.0519143225806452 times 31 kilometers.

It can also be expressed as: 31 kilometers is equal to $\frac{1}{\mathrm{0.0519143225806452}}$ miles.

Approximation

An approximate numerical result would be: thirty-one kilometers is about nineteen point two six miles, or alternatively, a mile is about zero point zero five times thirty-one kilometers.