What pace is a sub-4:00 marathon?
To run a sub-4:00 marathon, you need to hold 5:41 per kilometre. That is 9:09 per mile, or 10.5 km/h (6.6 mph), held for the whole marathon. Hold that pace evenly from start to finish and you cross the line right on 4:00:00. The table below shows the clock at every checkpoint if you run it even. Training indoors, dial the belt to 10.5 km/h (6.6 mph) directly, or use the treadmill pace calculator to convert any other pace to a belt speed.
Sub-4:00 marathon splits
| Distance | Target elapsed time |
|---|---|
| 5 km | 28:26 |
| 10 km | 56:53 |
| 15 km | 1:25:19 |
| 20 km | 1:53:45 |
| 21.0975 km (halfway) | 2:00:00 |
| 25 km | 2:22:12 |
| 30 km | 2:50:38 |
| 35 km | 3:19:05 |
| 40 km | 3:47:31 |
| 42.195 km (finish) | 4:00:00 |
Is a sub-4:00 marathon a realistic goal?
It depends on where you are now, but the honest test is whether you can already hold close to 5:41 per kilometre for a shorter effort. Breaking four hours is the most talked-about marathon benchmark there is. It's often the first marathon goal people train for specifically, rather than just aiming to finish.
The marathon is an eating-and-pacing test as much as a fitness one. Long runs, some at goal pace, and a rehearsed fuelling plan matter most. Run the first half so easy it feels like a mistake. That is how you avoid the wall.
What times does sub-4:00 marathon pace predict at other distances?
If you can run a sub-4:00 marathon, 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 | 25:01 | 5:00 |
| 10K | 52:10 | 5:13 |
| Half marathon | 1:55:07 | 5:27 |
| Marathon (this goal) | 4:00:00 | 5:41 |
| Mile | 7:31 | 4:41 |
How do you hold sub-4:00 marathon 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 marathon pacing guide, work splits with the pace calculator, and see how this pace compares on the pace charts.
Set 5:41/km as your target in Steady Pace and hold it by ear: a tone rises the moment you slow below sub-4:00 marathon pace and falls when you drift too fast, so you catch the surge in the first kilometre instead of the last.
Goal pace
sub-4:30 marathon pace
6:24 per km · 10:18 per mile.
Goal pace
sub-3:45 marathon pace
5:20 per km · 8:35 per mile.
Guide
How to pace a marathon
Strategy, mistakes, and how to hold marathon goal pace.
What pace do I need for a sub-4:00 marathon?
5:41 per kilometre, or 9:09 per mile, held for the full marathon (42.195 km). At that pace you finish in 4:00:00.
How do I convert sub-4:00 marathon pace to miles?
5:41 per kilometre is 9:09 per mile. Multiply the per-km pace by 1.609. Over the marathon that adds up to a 4:00:00 finish.
Should I run a sub-4:00 marathon 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 5:41/km almost always costs you more time later than it saves early.