what is a klick in measurement

A klick is a slang term used in the military to refer to a distance of one kilometer. It is not a formal unit of measurement, but rather a colloquialism that has been used by the US and UK militaries since at least World War I. The term is thought to have originated from either a pseudo-condensed pronunciation of "kilometer" or the sound of a military odometer. A klick is equivalent to 0.6214 miles, 1,000 meters, or 3,280.84 feet. While the term is not commonly used outside of military contexts, it can be used interchangeably with "kilometer" in everyday conversation.