The kilometre, spelt kilometer in American English, is a unit of length in the metric system, equal to one thousand metres.

What km means?

What does KM mean? kilometer, kilometre, km, klick(noun) a metric unit of length equal to 1000 meters (or 0.621371 miles)

What makes up 1 km?

A kilometer is a unit of length that is equal to 1,000 meters. So we can say that 1 kilometer = 1,000 meters. This term is easy to remember if you keep in mind that the prefix, kilo, is a Greek word that means thousand. Kilometers are usually abbreviated using the letters km.