77 millimeters in kilometers

Conversion formula
How to convert 77 millimeters to kilometers?

We know (by definition) that: $1\mathrm{mm}=1e-06\mathrm{km}$

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

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

Conclusion: 77 ⁢ mm = 7.7e-05 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 12987.012987013 times 77 millimeters.

It can also be expressed as: 77 millimeters is equal to $\frac{1}{\mathrm{12987.012987013}}$ kilometers.

Approximation

An approximate numerical result would be: seventy-seven millimeters is about zero kilometers, or alternatively, a kilometer is about twelve thousand, nine hundred and eighty-seven point zero one times seventy-seven millimeters.