42 millimeters in kilometers
Conversion
42 millimeters is equivalent to 4.2e-05 kilometers.[1]
Conversion formula
How to convert 42 millimeters to kilometers?
We know (by definition) that:
We can set up a proportion to solve for the number of kilometers.
Now, we cross multiply to solve for our unknown :
Conclusion:
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 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.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.