Reply #21: You made a valid point.

[frogmarch]

Here is what I found online about the pronunciation of kilometer.

http://lamar.colostate.edu/~hillger/faq.html#kilometer-pronounce

(snip)

The preferred pronunciation of kilometer puts the accent on the first syllable — KILL-oh-meet-er — although kill-AH-met-er is also common.
Note that other units with prefixes are accented on the first syllable — millimeter, kilogram, megawatt — and that words with the -AH-met-er pronunciation are generally instruments used to measure something — odometer, speedometer, thermometer — rather than units of measurement.

In particular, consider micrometer: Accented on the first syllable, it's a (rather small) unit of distance, while accented on the second syllable it's an instrument used to very accurately measure distances.

So it seems most logical to accent the first syllable of kilometer.

However, there is no “standard” pronunciation for kilometer or any other unit name.