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13.11 Miles / 21.0975 km

Half Marathon Pace Calculator

Plan your 13.1-mile race strategy with high mathematical precision. Compute required pace per km, mile splits, and midway checkpoint timing.

Common Half Marathon Target Times:
Goal Finish Time (HH:MM:SS)
hrs
mins
secs
Or Enter Target Pacemin/km
mins
secs
Pace /km5:41min/km
Pace /mile9:09min/mile
Midway Checkpoint1:00:00at 10.55 km (6.55 mi)
Running Speed10.55km/h (6.55 mph)

Half Marathon Split Schedule

CheckpointDistance (km)Distance (mi)Split TimeCumulative Time

Half Marathon Target Pace Matrix

Goal TimePace /kmPace /miSpeed (km/h)Speed (mph)Halfway (10.55 km)
1:30:004:166:5214.078.7445:00
1:45:004:598:0112.067.4952:30
2:00:005:419:0910.556.561:00:00
2:15:006:2410:189.385.831:07:30
2:30:007:0711:278.445.241:15:00
Elite Benchmark Standards

Typical Races and World Record Paces

Reference paces across official standard track, middle-distance, and road racing events.

CategoryMen's World Record PaceWomen's World Record Pace
100 meters
2:35/mile or 1:36/km2:49/mile or 1:45/km
200 meters
2:35/mile or 1:36/km2:52/mile or 1:47/km
400 meters
2:54/mile or 1:48/km3:12/mile or 1:59/km
800 meters
3:23/mile or 2:06/km3:48/mile or 2:21/km
1,500 meters
3:41/mile or 2:17/km4:07/mile or 2:34/km
1 mile
3:43/mile or 2:19/km4:13/mile or 2:37/km
5K
4:04/mile or 2:31/km4:34/mile or 2:50/km
10K
4:14/mile or 2:38/km4:45/mile or 2:57/km
Half Marathon(13.11 miles / 21.098 km)
4:27/mile or 2:46/km4:58/mile or 3:05/km
Marathon(26.22 miles / 42.195 km)
4:41/mile or 2:55/km5:10/mile or 3:13/km

Values represent official outdoor track and World Athletics certified course records converted into standard min/mile and min/km splits.Convert your custom pace →

Q&A Knowledge Base

Half Marathon Pacing FAQs

Practical answers to common pacing, split calculation, and training questions.

What pace do I need for a 2-hour half marathon?
A sub-2:00:00 half marathon requires an average pace of 5:41 min/km (9:09 min/mile) at a speed of 10.55 km/h (6.55 mph). You must cross the halfway checkpoint (10.55 km / 6.55 miles) in 59:59 or faster.
What pace is needed for a 1:45 half marathon?
A 1:45:00 finish time demands an average pace of 4:59 min/km (8:01 min/mile) at a speed of 12.06 km/h (7.49 mph).
Can I run 21.1 km without training?
Attempting a half marathon (21.0975 km) without dedicated aerobic preparation is not advisable. Untrained runners face severe risks of acute quadriceps and calf cramping, plantar fasciitis, severe dehydration, and cardiovascular exhaustion. Proper preparation generally requires 10 to 16 weeks of progressive weekly mileage.
What is the official half marathon distance in miles and km?
The official World Athletics standard half marathon distance is exactly 21.0975 kilometers (13.109378 miles). Road races certified by USATF and World Athletics include a 0.1% Short Course Prevention Factor, meaning courses measure at least 21.118 km.
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