5:20:00 marathon: what it equals and how to train for it
Running a marathon in 5:20:00 means holding 7:35 per kilometre (12:12 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 | 34:03 | 6:49 | 10:57 |
| 10K | 1:10:53 | 7:05 | 11:24 |
| 15K | 1:49:12 | 7:17 | 11:43 |
| 10 miles | 1:57:41 | 7:19 | 11:46 |
| Half marathon | 2:36:39 | 7:25 | 11:57 |
| Marathon | 5:20:00 | 7:35 | 12:12 |
Training paces for this fitness
| Run | Per km | Per mile | What it is for |
|---|---|---|---|
| Easy | 8:04 to 9:13 | 13:00 to 14:50 | Most of your running: conversational, builds the base. |
| Marathon | 7:35 | 12:12 | Steady, controlled race-effort running. |
| Threshold | 7:04 | 11:22 | Comfortably hard: tempo runs and cruise intervals. |
| Interval | 6:31 | 10:30 | Hard repeats of 3 to 5 minutes with jog recoveries. |
| Repetition | 6:09 | 9:54 | 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 marathon plan or build your own.
Questions
Is a 5:20:00 marathon a good time?
It depends on your age, experience and goals. A 5:20:00 marathon is an average pace of 7:35 per kilometre (12:12 per mile), which is equal in effort to 5K in 34:03. Use it as a starting point for training, not a verdict.
What should my easy pace be if I run a 5:20:00 marathon?
About 8:04 to 9:13 per kilometre (13:00 to 14:50 per mile). Easy runs should feel conversational; threshold work sits near 7:04 per kilometre.
Faster: 5:10:00 marathon · Slower: 5:30:00 marathon · All race times
These are estimates, not guarantees of a future result. Pace figures round to the second.