How long is a metric mile in US miles?

Answer 1

There is no such thing as a "metric" mile. There IS one kilometer, which is one thousand meters. One meter is 39.4 inches, making one kilometer 3,283 feet four inches. One mile is 5280 feet, making one kilometer about 6/10 of a mile.

EDIT: Whoever made that comment is being far to technical in their answer. To answer the question a different way, a metric mile is the name Americans give to the European standard of middle distance running in the Olympics: the 1500 meter race. So a metric mile is actually 1.5Km which is just 109 meters short of an actual mile. The 1500, or metric mile, is run at the Olympics, the 1600 is run in most American high schools, and the 1609 is the official USA Track and Field distance. All can be referred to as "the mile," but only the 1500 carries the name "metric mile."