420 kilometers in centimeters

Conversion formula
How to convert 420 kilometers to centimeters?

We know (by definition) that: $1\mathrm{km}=100000\mathrm{cm}$

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

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

Conclusion: 420 ⁢ km = 42000000 ⁢ cm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 centimeter is equal to 2.38095238095238e-08 times 420 kilometers.

It can also be expressed as: 420 kilometers is equal to $\frac{1}{\mathrm{2.38095238095238e-08}}$ centimeters.

Approximation

An approximate numerical result would be: four hundred and twenty kilometers is about forty-two million centimeters, or alternatively, a centimeter is about zero times four hundred and twenty kilometers.