A mile is equal to 1.609 kilometers, and is therefore longer than a kilometer. To convert miles to kilometers, simply multiply the number of miles by 1.609. To convert kilometers to miles, multiply the number of kilometers by 0.6214 or divide by 1.609.
A mile is 5,280 feet. A kilometer is 3,280.84 feet. Since the United States is one of the few remaining trading nations that does not use the metric system, conversions are always necessary. The U.S. measuring system is based on the British Imperial system but has been modified and is usually now referred to as the U.S. Customary system.