abbreviation of kilometre


If the correct SI is km for kilometer 

one kilometer = 1 km

What is the answer for two?

two kilometers = 2 kms or 2 km's ?

On road signs I think they only use "2 km" why is this?


And what is correct to say in England kilometer or kilometre?

asked Mar 15 '11 at 20:18 "h" New member

1 answer


The correct pluralisation of "km" is simply "km," without an "-s" and certainly without an apostrophe. No "-s" is used on abbreviations such as cm, m, mm, mi, yd, etc., either.


The correct British and Canadian spelling is "kilometre." Americans insist on using "kilometer."

link comment answered Mar 16 '11 at 03:00 Collane Ramsey Expert

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