1:25:00 half marathon: what it equals and how to train for it
Running a half marathon in 1:25:00 means holding 4:02 per kilometre (6:29 per mile). Here is what that fitness is worth at other distances, and the paces to train at.
Equal race times
Predictions from an equal-effort model: the time you could run at each distance with the same fitness and the right training. Longer distances need specific endurance work.
| Distance | Time | Pace per km | Pace per mile |
|---|---|---|---|
| 5K | 18:32 | 3:42 | 5:58 |
| 10K | 38:25 | 3:51 | 6:11 |
| 15K | 59:03 | 3:56 | 6:20 |
| 10 miles | 1:03:39 | 3:57 | 6:22 |
| Half marathon | 1:25:00 | 4:02 | 6:29 |
| Marathon | 2:57:24 | 4:12 | 6:46 |
Training paces for this fitness
| Run | Per km | Per mile | What it is for |
|---|---|---|---|
| Easy | 4:34 to 5:16 | 7:21 to 8:28 | Most of your running: conversational, builds the base. |
| Marathon | 4:12 | 6:46 | Steady, controlled race-effort running. |
| Threshold | 3:58 | 6:23 | Comfortably hard: tempo runs and cruise intervals. |
| Interval | 3:39 | 5:53 | Hard repeats of 3 to 5 minutes with jog recoveries. |
| Repetition | 3:26 | 5:32 | Short, fast repeats with full recovery, for speed and form. |
How to use these numbers
- Run most of your weekly distance at the easy pace. If you can only speak in short sentences, slow down.
- Keep threshold and interval work to a small share of the week, and add it gradually.
- Hot, hilly or windy? Judge hard sessions by effort, not pace.
- Re-check your numbers after a new race or a hard time trial: fitness changes, and so should your paces.
Turn this into a plan
Runergy Lab builds a week-by-week plan from your own race time, with these paces, the long runs and the easy weeks, and re-plans when life gets in the way. See the half marathon plan or build your own.
Questions
Is a 1:25:00 half marathon a good time?
It depends on your age, experience and goals. A 1:25:00 half marathon is an average pace of 4:02 per kilometre (6:29 per mile), which is equal in effort to Marathon in 2:57:24. Use it as a starting point for training, not a verdict.
What should my easy pace be if I run a 1:25:00 half marathon?
About 4:34 to 5:16 per kilometre (7:21 to 8:28 per mile). Easy runs should feel conversational; threshold work sits near 3:58 per kilometre.
Faster: 1:20:00 half marathon · Slower: 1:30:00 half marathon · All race times
These are estimates, not guarantees of a future result. Pace figures round to the second.