42 millimeters in kilometers

Result

The conversion result is: 42 millimeters is equivalent to 4.2e-05 kilometers.^[1]

Conversion formula
How to convert 42 millimeters to kilometers?

We know (by definition) that: 1 mm = 1e-06 km.

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

1 mm / 42 mm = 1e-06 km / x km

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

x km = (42 mm / 1 mm) * 1e-06 km → x km = 4.2e-05 km

Conclusion:

42 mm = 4.2e-05 km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 23809.5238095238 times 42 millimeters.

It can also be expressed as: 42 millimeters is equal to 1 / 23809.5238095238 kilometers.

Approximation

An approximate numerical result would be: forty-two millimeters is about zero kilometers, or alternatively, a kilometer is about twenty-three thousand, eight hundred and nine point five two times forty-two millimeters.