A half marathon is 13.1 miles long.

Exact distance

  • The standard half marathon distance is 13.1 miles, defined internationally as 21.0975 kilometers.
  • This is exactly half the length of a full marathon, which is 26.2 miles.

Helpful context

  • In steps, many running bodies estimate a half marathon at roughly 26,000 steps for an average runner.
  • You will often see the distance written as “13.1” on race bibs, medals, and car stickers because that is the accepted rounded mileage.

Information gathered from public forums or data available on the internet and portrayed here.