Q:

# How long is a kilometer?

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A kilometer is equal to 1,000 meters or 0.62137 miles. This is the primary measure of large distances throughout most of the world, though the United States still uses the mile as its standard.

## Keep Learning

Officially, the definition of a meter is the length of the path travelled by light in a vacuum during a time interval of 1/299,792,458 of a second. Therefore, the official definition of a kilometer is ten times that distance, which happens to be 1,000 meters. For a real world comparison, imagine Central Park in New York City. It is 849 meters wide — just short of a kilometer — and approximately 4 kilometers long.

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## Related Questions

• A:

One kilometer equals 1,000 meters. In the International System of Units, physical quantities are represented by specific SI units. A prefix is added to represent larger and smaller multiples of each unit. The prefix "kilo" means 1,000.

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• A:

Since a kilometer is equal to 0.62 miles, 5 kilometers is the metric equivalent of 3.1 miles. Races of 5 kilometers are popular, especially for beginners just starting to run, and are usually easy to find within a reasonable distance.

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• A:

One kilometer is equal to 0.6214 miles. Multiplying the number of kilometers by 0.6214 reveals the equivalent number of miles. For example, a 5-kilometer race is equal to approximately 3.11 miles; likewise a 10-kilometer race covers 6.22 miles.