The kilometer (km) equals 1,000 meters and is the standard unit for measuring long distances between cities, countries, and geographic features. Road signs in most countries display distances in kilometers, and running races commonly use kilometer markers. One kilometer is equivalent to about 0.6214 miles, making it easy to convert between metric and imperial distance scales.

The mile (mi) is an imperial distance unit equal to 5,280 feet or approximately 1.6093 kilometers, used primarily in the United States and United Kingdom for road distances. Speed limits on American highways are posted in miles per hour, and runners often use the mile as a benchmark distance. One mile equals roughly 1.609 kilometers.