Sub-2:00 Milestone • Verified Endurance Pacing Table
Half Marathon (21.1 km / 13.1 mi) in 120 Minutes: Exact Pace per Km, Mile & Split Table
Interactive pacing model for running a 120-minute Half Marathon (21.1 km / 13.1 mi). Adjust target minutes below to recalculate real-time kilometer, mile, and 400m track splits.
Required Pace (Per Km & Per Mile)
5:41 /km • 9:09 /mi
Treadmill Speed & 400m Lap
10.55 km/h (6.55 mph) • 137s / 400m
1st Half vs 2nd Half Pace
5:45 → 5:38 /km
Need custom distances? Open the master Running Pace Calculator →
Official Checkpoint Split Table — Half Marathon (21.1 km / 13.1 mi) in 120 Minutes
| Checkpoint Distance | Cumulative Elapsed Time | Pace per Kilometer | Pace per Mile |
|---|---|---|---|
| 5 km | 28:26 | 5:41 /km | 9:09 /mi |
| 10 km | 56:53 | 5:41 /km | 9:09 /mi |
| 15 km | 1:25:19 | 5:41 /km | 9:09 /mi |
| 20 km | 1:53:45 | 5:41 /km | 9:09 /mi |
| 21.1 km (Half) | 2:00:00 | 5:41 /km | 9:09 /mi |
Frequently Asked Questions — Half Marathon (21.1 km / 13.1 mi) in 120 Min
What pace per km and per mile is needed for a 120-minute Half Marathon (21.1 km / 13.1 mi)?
To finish a Half Marathon (21.1 km / 13.1 mi) in 120 minutes, you must maintain an average pace of 5:41 per kilometer (9:09 per mile), which equals an average running speed of 10.55 km/h (6.55 mph) and 137 seconds per 400m track lap.
Should I run an even split or a negative split for a 120-minute Half Marathon (21.1 km / 13.1 mi)?
Exercise physiology studies show a 1% to 2% negative split (running the first half ~2–3 seconds per km slower than 5:41/km and accelerating in the final third) minimizes early lactate accumulation and glycogen depletion.