What Does the "K" Stand for in "100K"?

What Does the "K" Stand for in "100K"?

What Does the "K" Stand for in "100K"?

The "K" in "100K" can stand for a few things; it could mean kilometers, indicating a 100 kilometer foot race, commonly called an ultra-marathon. Alternately, it could simply refer to the prefix "kilo," meaning one thousand. This means that "100K" stands for 100,000.

When K refers generally to the prefix "kilo," it is in instances where a large number is being used. For instance, a salary of $100,000 per year could be referred to in abbreviated fashion as "$100K."

The 100-kilometer ultra-marathon, equivalent to approximately 62.14 miles, is one of the more common lengths of that type of race. Other common lengths include: 50 kilometers, 50 miles and 100 miles, although the 100-kilometer race is recognized as an official world record event.