To convert Kilometers to Millimeters, We need Conversion factors

conversion factor of 1 Kilometers (km) = 1000000 Millimeters (mm).

Now, that we have value of 1 Kilometers in Millimeters, we can convert any value of Kilometers to Millimeters.

We need to multiply the 1000000 Millimeters by the value of Kilometers we want to convert.