Is it 10 km or 10km?

Is it 10 km or 10km?

The 10K, or ten-kilometer run, is a popular road race spanning approximately 6.2 miles. This long-distance event is a common fixture on the racing calendar, nestled comfortably between the shorter 5K and the more demanding half marathon and marathon distances, attracting a wide range of runners.

The "K" in 10K stands for kilometer, a metric unit of distance equal to 1,000 meters. Therefore, a 10K race covers a distance of 10 kilometers, or 6.21371 miles.

When writing the distance of a race, it is common to use the abbreviation "km" for kilometers and "mi" for miles. For example, a 10K race can be written as 10km or 10.0km, and a 10-mile race can be written as 10mi or 10.0mi.

It is not correct to write the distance of a race as 10km. The "km" abbreviation should always be preceded by a number, so the correct way to write the distance of a 10-kilometer race is 10km.

Here are some examples of correctly written race distances:

• 5K
• 10K
• 15K
• 10mi
• 13.1mi
• 26.2mi

When in doubt, it is always best to consult the race website or organizer for the official distance of the race.