Half Marathon Pace Calculator

About this calculator

A half marathon covers 21.0975 kilometers (13.1 miles), and your required pace is simply your goal finish time divided by that distance — expressed as minutes per kilometer and minutes per mile so you can pace yourself against course markers in either unit. A 2-hour goal, for example, works out to about 5:41 min/km (9:09 min/mile).

Runners and coaches use this figure to build training plans, set splits for each 5K segment of the race, and program GPS watches like Garmin or Strava with target pace alerts. Knowing the exact pace ahead of time helps avoid the classic mistake of starting too fast and fading in the final kilometers.