The core formula
Pace = time ÷ distance. If you finish a 10K (6.21371 miles) in 50:00 (3,000 seconds), pace is 3,000 ÷ 6.21371 ≈ 483 seconds per mile → about 8:03 per mile. Use the interactive race pace calculator to skip the arithmetic.
Solve for finish time
Finish time = pace × distance. A 9:00/mi goal for a half marathon (13.1094 mi) is 9 × 60 × 13.1094 ≈ 7,079 seconds → about 1:57:59.
Sample pace chart (minutes per mile)
| Pace /mi | 5K | 10K | Half | Marathon |
|---|---|---|---|---|
| 7:00 | 21:45 | 43:30 | 1:31:46 | 3:03:33 |
| 8:00 | 24:51 | 49:43 | 1:44:52 | 3:29:45 |
| 9:00 | 27:58 | 55:55 | 1:57:59 | 3:55:58 |
| 10:00 | 31:04 | 1:02:08 | 2:11:05 | 4:22:11 |
| 11:00 | 34:11 | 1:08:21 | 2:24:12 | 4:48:24 |
| 12:00 | 37:17 | 1:14:34 | 2:37:18 | 5:14:37 |
Times are rounded; verify with the race pace calculator for exact splits.
Related tools
- Treadmill pace calculator — incline-adjusted effort
- Bike pace calculator — speed and ride finish times
- Run walk pace calculator — interval average pace