One kilometer (km) is equal to approximately 0.621371 miles. To convert kilometers to miles, you multiply the number of kilometers by this factor. For example, 10 kilometers is about 6.21371 miles. This conversion is commonly used because kilometers are part of the metric system, while miles are used primarily in the United States, the UK, and a few other countries. The formula for converting kilometers to miles is:

miles=kilometers×0.621371\text{miles}=\text{kilometers}\times 0.621371miles=kilometers×0.621371

Knowing this conversion is useful for travel, navigation, fitness tracking, and understanding distances in different measurement systems.