A half marathon is 21.0975 kilometers, or 13.1 miles. At this distance pacing decides the race: a few seconds per mile too fast early can cost minutes in the last 5K.
Enter your goal finish time to get the pace per mile or kilometer, then use the splits table as a race plan. For example, a 1:45:29 half marathon is 5:00 per kilometer, or about 8:03 per mile.
If you are choosing a goal, enter a pace you can hold for a long tempo run and see the finish time it predicts.
Frequently asked questions
How many miles is a half marathon?
A half marathon is 13.1 miles, or 21.0975 kilometers.
What pace is a 2-hour half marathon?
About 5:41 per kilometer, or about 9:09 per mile.
What pace is a 1:45 half marathon?
About 4:59 per kilometer, or about 8:01 per mile.
How should I pace a half marathon?
Start at or slightly slower than goal pace for the first few miles, hold it through the middle, and only speed up in the final 5K if you feel strong.