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Running Pace Calculator
Calculate your training paces from any race time
Enter distance and time to get pace, speed and race splits — or solve for finish time or distance.
Your results
Based on Half Marathon in 1:47:01
Pace
5:04/km
Pace & speed summary
| Metric | Value | Notes |
|---|---|---|
| Pace (min/km) | 5:04 | Time per kilometre |
| Pace (min/mile) | 8:10 | Time per mile |
| Speed (km/h) | 11.8 | Average speed |
| Speed (mph) | 7.3 | Average speed |
| Distance | 21.1 km | 1:47:01 |
Results are exact arithmetic from your distance and time (or pace). Adjust for conditions and terrain as needed.
Key conversions
min/km
5:04
min/mile
8:10
km/h
11.8
Finish time
1:47:01
Pace visualization
Longer bars mean slower pace (more seconds per unit distance).
- min/km5:04
- min/mile8:10
Race splits
| Point | Cumulative | Segment |
|---|---|---|
| 5K | 25:22 | 25:22 |
| 10K | 50:43 | 25:21 |
| 15K | 1:16:05 | 25:22 |
| Finish | 1:47:01 | 30:56 |
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FAQ
How do I calculate running pace?
Divide your finish time by the distance. Example: 25:00 for 5K is 5:00 per kilometre. Use Distance + Time mode on this calculator.
Try this example →What is the difference between pace and speed?
Pace is time per unit distance (e.g. min/km). Speed is distance per unit time (e.g. km/h). They describe the same effort in inverse units.
How do I convert min/km to min/mile?
Multiply min/km by 1.609344 (or use this calculator — both units are always shown).
What pace do I need for a sub-2-hour half marathon?
A 1:59:59 half needs about 5:41 per kilometre (9:09 per mile). Use Distance + Pace or the Half Marathon target presets.
Try this example →What pace do I need for a 4-hour marathon?
A 4:00:00 marathon is about 5:41 per kilometre (9:09 per mile). Try the Sub 4:00 marathon shortcut.
Try this example →