Half Marathon Pace Calculator
9:09/mi
6.55mph
21.0975 km · 13.11 mi
- First half
- 9:09/mi
- Second half
- 9:09/mi
- Half split
- 1:00:00
Checkpoints
5K
3.11 mi
10K
6.21 mi
10 mi
10.00 mi
Finish
13.11 mi
Kilometer splits
1 km
1.00 km
2 km
2.00 km
3 km
3.00 km
4 km
4.00 km
5 km
5.00 km
6 km
6.00 km
7 km
7.00 km
8 km
8.00 km
9 km
9.00 km
10 km
10.00 km
11 km
11.00 km
12 km
12.00 km
13 km
13.00 km
14 km
14.00 km
15 km
15.00 km
16 km
16.00 km
17 km
17.00 km
18 km
18.00 km
19 km
19.00 km
20 km
20.00 km
21 km
21.00 km
Mile splits
1 mi
1.00 mi
2 mi
2.00 mi
3 mi
3.00 mi
4 mi
4.00 mi
5 mi
5.00 mi
6 mi
6.00 mi
7 mi
7.00 mi
8 mi
8.00 mi
9 mi
9.00 mi
10 mi
10.00 mi
11 mi
11.00 mi
12 mi
12.00 mi
13 mi
13.00 mi
Finish
13.11 mi
Even pace for 21.0975 km, not a race-equivalence predictor. Marathon pace · Pace converter · Pace calculator · 5K pace · 15K pace · Race time predictor · Race pace band · Pace card · 50K pace · 50 mile pace · 100 mile pace · 100K pace.
Worked examples
2:00:00 half
9:09 /mi · 5:41 /km
1:30:00 half
6:52 /mi · 4:16 /km
1:45:00 half
8:01 /mi · 4:59 /km
Formulas
Arithmetic, not physiology. Distance is locked at 21.0975 km (13.11 mi) — the World Athletics half, exactly half of 42.195 km. Pace = time / distance. A 2:00 half is the same even pace as a 4:00 marathon. This is even pace, not race-equivalence. For a 5K→half estimate, use the race time predictor (Riegel).
- pace = time / 21.0975 km
- half = 21.0975 km ≈ 13.11 mi
- 1 mile = 1.609344 km
Same mile as marathon pace · pace converter · split calculator · 15K pace · race pace band.
FAQ
What pace is a 2 hour half marathon?
A 2:00:00 half is 9:09 per mile, or 5:41 per kilometer, at even pace. That is the World Athletics half of 21.0975 km — the same even pace as a 4:00 marathon. Load the 2:00 chip to see the giant pace and splits.
What pace is a 1:45 half marathon?
A 1:45:00 half is 8:01 per mile, or 4:59 per kilometer, at even pace. The 1:45 chip fills the goal time and updates live.
What pace is a 1:30 half marathon?
A 1:30:00 half is 6:52 per mile, or 4:16 per kilometer, at even pace. Same even pace as a 3:00 marathon.
How far is a half marathon?
A half marathon is 21.0975 kilometers, which is 13.11 miles using 1 mile = 1.609344 km. SplitLab locks this page to that distance so a 2:00 finish is 9:09/mi, not a guess from a rounded 13.1.
How do I negative-split a half marathon?
Run the first 10.54875 km about 3% slower than even pace and the second half about 3% faster. Finish time still matches the goal. A 2:00:00 plan hits halfway in 1:01:48 instead of 1:00:00, then closes in 58:12. This is a pacing strategy, not a fitness model.