Half Marathon Pace
Calculate half marathon running pace, finish time, and split times from target time or pace per mile/km.
Half Marathon Pace Explained
This Half Marathon Pace Calculator converts between finish time and running pace for the standard half marathon distance of 21.0975 km (13.1094 miles). Switch between finish-time-to-pace and pace-to-finish-time modes. For shorter distances, try our 5K Pace Calculator.
Half Marathon Distance
A half marathon is exactly 21.0975 km or 13.1094 miles. Pace is calculated as total time divided by distance, expressed in minutes per kilometer or minutes per mile.
Planning Your Race
Enter your target finish time to see the required pace per km and per mile, plus equivalent running speed in km/h and mph. Or enter your training pace to estimate your half marathon finish time.
Frequently Asked Questions
How long is a half marathon?
A half marathon is 21.0975 kilometers or 13.1094 miles — exactly half the distance of a full marathon.
How do I calculate half marathon pace?
Divide your finish time in seconds by 21.0975 to get seconds per kilometer, then convert to minutes and seconds per km.
What is a good half marathon time?
Finishing under 2 hours (sub-5:41/km pace) is a common goal for recreational runners. Competitive runners often target under 1:30.
Can I enter pace in minutes per mile?
Yes. In pace-to-time mode, select minutes per mile as your pace unit and the calculator will estimate your half marathon finish time.
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