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Pace converter, race calculator, split planner, treadmill converter, and run/walk estimator.
Mile ↔ KM
Equivalent Pace
Average Pace
Pace / km
--:--
Pace / mile
--:--
Constant-pace estimates
1 km
5:00
1 mile
8:03
5 km
25:00
10 km
50:00
10 miles
1:20:28
Half marathon
1:45:29
Marathon
3:30:59
Projections assume perfectly even pacing. Real races are affected by course profile, weather, and pacing strategy.
Per-interval times
| Distance (km) | Cumulative Time |
|---|---|
| 1 | 5:00 |
| 2 | 10:00 |
| 3 | 15:00 |
| 4 | 20:00 |
| 5 | 25:00 |
Pace, speed, and km/h
km/h
12.00
mph
7.46
min/km
5:00
min/mile
8:03
Average pace with intervals
Avg pace / km
19115:03
Finish time
26:32:55
Running time
23:53:38
Walking time
2:39:18
Pace per unit = total time ÷ distance.
Speed = distance ÷ total time.
Race time = pace × race distance.
Projections multiply the same pace by standard race distances.
Cumulative time at any interval = pace × cumulative distance.
Splits are printed at the interval you choose (km, mile, or custom).
km/h = 60 ÷ pace in minutes per kilometre.
Run/walk average = (run time × run pace + walk time × walk pace) ÷ total time.
Race predictions and split times assume constant pace. Real performance depends on training, course profile, weather, and pacing strategy. Use these numbers as a rough guide, not a guarantee.