# Sub-40:00 10K pace

> The pace for a sub-40:00 10K is 4:00 per km (6:26 per mile). Full split table, equivalent race times, and how to hold it. Free, no sign-up.

Hold 4:00 per kilometre, or 6:26 per mile, for the whole 10K, and you finish in 40:00. Here are the splits, the equivalents, and how to hold it.

4:00

per kilometre

6:26

per mile

15.0

km/h

9.3

mph

## What pace is a sub-40:00 10K?

To run a sub-40:00 10K, you need to hold **4:00 per kilometre**. That is
**6:26 per mile**, or 15.0 km/h (9.3 mph), held for the whole
10K. Hold that pace evenly from start to finish and you cross the line right on 40:00.
The table below shows the clock at every checkpoint if you run it even. Training indoors, dial the
belt to 15.0 km/h (9.3 mph) directly, or use the [treadmill
pace calculator](https://steadypace.ca/treadmill-pace-calculator) to convert any other pace to a belt speed.

## Sub-40:00 10K splits

| Distance | Target elapsed time |
| --- | --- |
| 1 km | 4:00 |
| 2 km | 8:00 |
| 3 km | 12:00 |
| 4 km | 16:00 |
| 5 km (halfway) | 20:00 |
| 6 km | 24:00 |
| 7 km | 28:00 |
| 8 km | 32:00 |
| 9 km | 36:00 |
| 10 km (finish) | 40:00 |

Even-pace splits for 40:00 over the 10K. Aim to reach halfway a few
seconds behind these and finish a few ahead. A slight [negative
split](https://steadypace.ca/guides/negative-splits) is safer than banking time early.

## Is a sub-40:00 10K a realistic goal?

It depends on where you are now, but the honest test is whether you can already hold close to
4:00 per kilometre for a shorter effort. This is a highly competitive amateur time, the same pace as a 20-minute 5K sustained for twice as long. It's rare outside runners with a genuine competitive background and a structured training history.

The 10K sits on your threshold, the effort you can just hold. Train it with tempo runs and longer intervals (say, 1 km repeats at goal pace), plus easy volume. Race the middle evenly; do not bank time in the first 2 km.

## What times does sub-40:00 10K pace predict at other distances?

If you can run a sub-40:00 10K, you're roughly capable of these times at other distances, estimated
with the Riegel formula, which scales a known time by distance. Real results vary with training and
terrain, but it's a useful reality check.

| Distance | Equivalent time | Pace / km |
| --- | --- | --- |
| 5K | 19:11 | 3:50 |
| 10K (this goal) | 40:00 | 4:00 |
| Half marathon | 1:28:15 | 4:11 |
| Marathon | 3:04:00 | 4:22 |
| Mile | 5:46 | 3:35 |

## How do you hold sub-40:00 10K pace on the day?

Know the number, then hold it evenly. Most people miss a goal like this by starting too fast and
fading late, when they still had the fitness to finish. Read the full [10K pacing guide](https://steadypace.ca/guides/how-to-pace-a-10k),
work splits with the [pace calculator](https://steadypace.ca/pace-calculator), and see how this pace compares
on the [pace charts](https://steadypace.ca/pace-chart).

Set **4:00/km** as your target in
[Steady Pace](https://apps.apple.com/app/steady-pace/id6773682525) and hold it by ear:
a tone rises the moment you slow below sub-40:00 10K pace and falls when you drift too fast, so you catch the
surge in the first kilometre instead of the last.

- [sub-50:00 10K pace](https://steadypace.ca/pace/sub-50-minute-10k): 5:00 per km · 8:03 per mile.
- [sub-45:00 10K pace](https://steadypace.ca/pace/sub-45-minute-10k): 4:30 per km · 7:15 per mile.
- [How to pace a 10K](https://steadypace.ca/guides/how-to-pace-a-10k): Strategy, mistakes, and how to hold 10K goal pace.

**What pace do I need for a sub-40:00 10K?**

4:00 per kilometre, or 6:26 per mile, held for the full 10K (10 km). At that pace you finish in 40:00.

**How do I convert sub-40:00 10K pace to miles?**

4:00 per kilometre is 6:26 per mile. Multiply the per-km pace by 1.609. Over the 10K that adds up to a 40:00 finish.

**Should I run a sub-40:00 10K as an even or negative split?**

Even, or a slight negative split. Reach halfway just behind goal pace and finish just ahead. Going out faster than 4:00/km almost always costs you more time later than it saves early.


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Source: https://steadypace.ca/pace/sub-40-minute-10k
App Store: https://apps.apple.com/app/steady-pace/id6773682525