40 kilometers in miles

Conversion formula
How to convert 40 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: 40 ⁢ km ≈ 24.8548476 ⁢ mile

Conversion in the opposite direction

The inverse of the conversion factor is that 1 mile is equal to 0.0402336 times 40 kilometers.

It can also be expressed as: 40 kilometers is equal to $\frac{1}{\mathrm{0.0402336}}$ miles.

Approximation

An approximate numerical result would be: forty kilometers is about twenty-four point eight five miles, or alternatively, a mile is about zero point zero four times forty kilometers.