400 centimeters in kilometers

Conversion formula
How to convert 400 centimeters to kilometers?

We know (by definition) that: $1\mathrm{cm}=1e-05\mathrm{km}$

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

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

Conclusion: 400 ⁢ cm = 0.004 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 250 times 400 centimeters.

It can also be expressed as: 400 centimeters is equal to $\frac{1}{\mathrm{250}}$ kilometers.

Approximation

An approximate numerical result would be: four hundred centimeters is about zero kilometers, or alternatively, a kilometer is about two hundred and fifty times four hundred centimeters.