PaceForge
The legs do the work; the numbers show what that work is worth—pace, prediction, proof.
Track · Train · Race
/race-day
Race day
Plan how you will run the course: kilometer splits, an on-screen pace band, and fueling so nothing is left to guesswork on the start line.
Pick a tool
Splits — build a pacing strategy and per-km cheat sheet. Pace band — save a lock-screen image or print a wrist strip. Fueling — estimate carbs, fluid, and when to take gels. Use goal times from VDOT or your own target. VDOT
Splits tab
Set race distance, goal finish time, and how you want to distribute effort (even vs negative split). The table shows each km with elapsed time and pace for your race plan.
Race Strategy & Split Matrix
Per-km splits with elapsed time and pace (km / mile).
Target time
1:45:00
Adjust Hr · Min · Sec below
Classic negative split (~3%). Good default for half and marathon when you feel controlled early.
| Km | Mi | Split | Elapsed | Pace/km | Pace/mi |
|---|---|---|---|---|---|
| 1 | 0.62 | 5:03 | 5:03 | 5:03 | 8:07 |
| 2 | 1.24 | 5:02 | 10:05 | 5:02 | 8:07 |
| 3 | 1.86 | 5:02 | 15:07 | 5:02 | 8:06 |
| 4 | 2.49 | 5:02 | 20:09 | 5:02 | 8:05 |
| 5 | 3.11 | 5:01 | 25:10 | 5:01 | 8:05 |
| 6 | 3.73 | 5:01 | 30:11 | 5:01 | 8:04 |
| 7 | 4.35 | 5:00 | 35:11 | 5:00 | 8:03 |
| 8 | 4.97 | 5:00 | 40:11 | 5:00 | 8:03 |
| 9 | 5.59 | 4:59 | 45:11 | 4:59 | 8:02 |
| 10 | 6.21 | 4:59 | 50:10 | 4:59 | 8:01 |
| 11 | 6.84 | 4:59 | 55:08 | 4:59 | 8:01 |
| 12 | 7.46 | 4:58 | 1:00:07 | 4:58 | 8:00 |
| 13 | 8.08 | 4:58 | 1:05:04 | 4:58 | 7:59 |
| 14 | 8.70 | 4:57 | 1:10:02 | 4:57 | 7:59 |
| 15 | 9.32 | 4:57 | 1:14:59 | 4:57 | 7:58 |
| 16 | 9.94 | 4:57 | 1:19:55 | 4:57 | 7:57 |
| 17 | 10.56 | 4:56 | 1:24:51 | 4:56 | 7:57 |
| 18 | 11.18 | 4:56 | 1:29:47 | 4:56 | 7:56 |
| 19 | 11.81 | 4:55 | 1:34:42 | 4:55 | 7:55 |
| 20 | 12.43 | 4:55 | 1:39:37 | 4:55 | 7:54 |
| 21 | 13.05 | 4:54 | 1:44:31 | 4:54 | 7:54 |
| 21.097 | 13.11 | 0:29 | 1:45:00 | 4:54 | 7:53 |