How many millimeters are in an inch? There are 25.4 millimeters in one inch. How many kilometers are in a mile? There are about 1.61 kilometers in a mile.

For long-distance swimmers, winning a gold medal in the 1,500-meter freestyle is as good as it gets. Nicknamed "the mile race" by the aquatic community, the event is the longest distance athletes swim ...

How many miles is the Olympic marathon? The Olympic marathon is a 26.219-mile race with a route that passes through nine of the Île-de-France region’s districts. How long are the Olympic race walking ...