Running Pace Calculator
Calculate running pace and speed from any distance and time, and predict your 5K, 10K, half-marathon and marathon times from one result with the Riegel formula. Free, per-km or per-mile.
Enter a distance and time to get your pace per kilometre and mile and your average speed, then read a predicted time for every distance using Riegel's endurance formula.
Example: race times equivalent to a 50:00 10K
| Distance | Predicted time | Pace /km |
|---|---|---|
| 1K | 4:21 | 4:21 |
| 1 Mile | 7:13 | 4:29 |
| 5K | 23:59 | 4:48 |
| 10K | 50:00 | 5:00 |
| 15K | 1:16:51 | 5:07 |
| Half Marathon | 1:50:19 | 5:14 |
| Marathon | 3:50:01 | 5:27 |