Sub-45 5K pace (45:00)
A 45-minute (sub-45) 5K is 9:00/km (14:29/mi), 6.7 km/h.
| Change | Time | Pace |
|---|---|---|
| −0:40 | 44:20 | 8:5214:16 |
| −0:30 | 44:30 | 8:5414:19 |
| −0:20 | 44:40 | 8:5614:23 |
| −0:10 | 44:50 | 8:5814:26 |
| Your target /km | ||
| +0:10 | 45:10 | 9:0214:32 |
| +0:20 | 45:20 | 9:0414:35 |
| +0:30 | 45:30 | 9:0614:39 |
| +0:40 | 45:40 | 9:0814:42 |
Arrow keys nudge the value. Hold Shift for bigger steps.
Finish times at 9:00 per km
| Distance | Finish time |
|---|---|
| 1K | 9:00 |
| 1 mile | 14:29 |
| 5K | 45:00 |
| 10K | 1:30:00 |
| 10 miles | 2:24:50 |
| Half marathon | 3:09:53 |
| Marathon | 6:19:45 |
| 50K | 7:30:00 |
Splits for a 45:00 5K
| km | Split | Elapsed |
|---|---|---|
| 1 | 9:00 | 9:00 |
| 2 | 9:00 | 18:00 |
| 3 | 9:00 | 27:00 |
| 4 | 9:00 | 36:00 |
| 5 | 9:00 | 45:00 |
| Mile | Split | Elapsed |
|---|---|---|
| 1 | 14:29 | 14:29 |
| 2 | 14:29 | 28:58 |
| 3 | 14:29 | 43:27 |
| Final 0.107 mi | 1:33 | 45:00 |
What a 45:00 5K predicts
Estimate| Distance | Estimated time |
|---|---|
| 10K | 1:33:49 |
| 10 miles | 2:35:22 |
| Half marathon | 3:27:01 |
| Marathon | 7:11:36 |
These are estimates from the Riegel formula, T2 = T1 × (D2 ÷ D1)^1.06. They assume you’ve trained for the other distance, so treat them as a guide, not a promise.
Over 30 minutes, run/walk is a real plan
Run/walk intervals work well at this pace. Decide them before the start and the last kilometre gets easier.
Regular short runs build the base. Add a few minutes each week.
Start further back so you don’t get pulled out too fast.
Pace questions runners ask
- What pace do I need for a 45:00 5K?
- A 45:00 5K is 9:00/km (14:29/mi), 6.7 km/h, held for the whole race.
- What treadmill speed is 45:00 5K pace?
- Set the treadmill to 6.7 km/h or 4.1 mph to run 9:00/km (14:29/mi).
- Where should I be at halfway in a 45:00 5K?
- With even pacing you pass halfway in 22:30; with a negative split, a little later.
- What does a 45:00 5K predict for other distances?
- The Riegel formula estimates 1:33:49 for the 10K, 2:35:22 for the 10-mile race, 3:27:01 for the half marathon, 7:11:36 for the marathon, assuming you’ve trained for each distance.