The men's marathon world record pace is 2:49.9 per kilometre — that's 4:33.5 per mile, 21.20 km/h, or 13.17 mph. It was set by Sabastian Sawe on April 26, 2026 at the London Marathon, running 1:59:30 over the 42.195 km course and becoming the first person to officially break two hours in a record-eligible race. The women's world record pace is 3:07.5 per kilometre (5:02 per mile, 19.20 km/h), set by Tigst Assefa at the 2023 Berlin Marathon in 2:11:53.
This page is the breakdown — every split, every comparison, and a sense of what those numbers actually feel like to hold for two hours straight.
The two numbers at a glance
| Record | Athlete | Time | Pace per km | Pace per mile | km/h | mph |
|---|---|---|---|---|---|---|
| Men's WR | Sabastian Sawe | 1:59:30 | 2:49.9 | 4:33.5 | 21.20 | 13.17 |
| Women's WR | Tigst Assefa | 2:11:53 | 3:07.5 | 5:02 | 19.20 | 11.93 |
A quick sanity check on the men's number: 1:59:30 = 7,170 seconds. Divide by 42.195 km and you get 169.92 seconds per kilometre — which is 2 minutes and 49.92 seconds, or 2:49.9/km. The 2:50/km figure you see quoted everywhere is a friendly round; the actual pace is six tenths of a second per kilometre faster than that.
What the men's record pace looks like, kilometre by kilometre
If Sabastian Sawe had run perfectly even splits in London (he didn't — more on that below), every single 1 km marker would have ticked over at exactly 2:49.9 after the previous one. Stretched across the whole race, that turns into the following cumulative times:
| Distance | Cumulative time at WR pace |
|---|---|
| 1 km | 0:02:50 |
| 5 km | 0:14:10 |
| 10 km | 0:28:19 |
| 15 km | 0:42:29 |
| 21.0975 km (half) | 0:59:43 |
| 25 km | 1:10:48 |
| 30 km | 1:24:58 |
| 35 km | 1:39:08 |
| 40 km | 1:53:17 |
| 42.195 km (full) | 1:59:30 |
A few things worth noticing in that table. The 5 km splits are 14:10. The 10 km splits are 28:19. Sawe — and Kipchoge before him in the INEOS 1:59 trial — held those splits within about two seconds for the entire race. That's a level of pace control that, until 2026, had only been observed in laboratory time trials.
What the women's record pace looks like, kilometre by kilometre
Tigst Assefa's 2:11:53 in Berlin works out to the same kind of mechanical breakdown:
| Distance | Cumulative time at WR pace |
|---|---|
| 1 km | 0:03:07 |
| 5 km | 0:15:37 |
| 10 km | 0:31:14 |
| 15 km | 0:46:52 |
| 21.0975 km (half) | 1:05:56 |
| 25 km | 1:18:09 |
| 30 km | 1:33:46 |
| 35 km | 1:49:24 |
| 40 km | 2:05:01 |
| 42.195 km (full) | 2:11:53 |
To put Assefa's number in context: a 3:07.5/km pace would put a recreational runner at the front of every local 10K. Sustained over 42.195 km is, statistically, a once-in-a-generation performance — and her 2:11:53 broke Brigid Kosgei's previous record by 2 minutes and 11 seconds, the largest single improvement to the women's marathon record in the modern era.
How the records actually unfolded (negative splits)
Both records were negative splits — second half faster than the first — not even pacing. The truly elite tend to bank a small reserve in the first 21 km and spend it across the second 21 km. For Sawe in London on April 26, 2026:
- First half: roughly 1:00:29
- Second half: roughly 0:59:01
- Net negative split: about 88 seconds
That tells you something about how a sub-2 marathon is paced, not just how fast it is. The fastest marathon ever run in race conditions was run by someone who was, by his own clock, running uphill on the first half and downhill on the second. For more on why elite marathoners almost always negative split, see how to pace a marathon.
Marathon WR pace at every common race distance
If you took the men's WR pace of 2:49.9/km and held it across other distances, here's what the splits look like. A useful gut check for how absurd the pace really is:
| Distance | Time at men's WR pace | Time at women's WR pace |
|---|---|---|
| 400 m | 1:08 | 1:15 |
| 1 mile | 4:33.5 | 5:02 |
| 5 km | 14:10 | 15:37 |
| 10 km | 28:19 | 31:14 |
| 15 km | 42:29 | 46:52 |
| Half marathon | 59:43 | 1:05:56 |
| 20 mi | 1:31:01 | 1:40:30 |
| Marathon | 1:59:30 | 2:11:53 |
The men's WR pace would win every U.S. high-school 5K championship outright. The women's WR pace would still finish in the top handful at almost every elite 10K on the planet. And these are marathon paces — held for two-plus hours, not five-K efforts.
How the men's WR pace compares to a recreational runner
For most people running marathons, pace conversations happen at 5:00–6:30 per kilometre. The men's WR pace lives in a completely different neighbourhood. Putting it next to recreational targets:
| Goal | Finish time | Pace per km | Slower than WR by |
|---|---|---|---|
| Men's WR (Sawe) | 1:59:30 | 2:49.9 | — |
| Women's WR (Assefa) | 2:11:53 | 3:07.5 | +17.6 s/km |
| Boston Q (M 18-34) | 3:00:00 | 4:15.9 | +1 min 26 s/km |
| Sub-3:30 marathon | 3:30:00 | 4:58.6 | +2 min 9 s/km |
| Sub-4:00 marathon | 4:00:00 | 5:41.3 | +2 min 51 s/km |
| Sub-5:00 marathon | 5:00:00 | 7:06.6 | +4 min 17 s/km |
| Average recreational finish | 4:30:00 | 6:24 | +3 min 34 s/km |
The "slower by" column is the part worth dwelling on. A sub-3-hour marathon — which is achieved by only around 4% of all marathon finishers worldwide — is run at a pace that is one and a half minutes per kilometre slower than the world record. Over 42 km, that gap compounds to about an hour.
For the full pace-to-finish-time reference, see the marathon pace chart for every pace from 4:00 to 7:00 per km.
Sub-2 marathon pace converted into other units
The marathon WR pace gets quoted in different units depending on who you ask. Here it is in everything at once:
- Pace per kilometre: 2:49.9 (often rounded to 2:50)
- Pace per mile: 4:33.5 (often rounded to 4:34)
- Pace per 400 m lap: 67.97 seconds
- Pace per 100 m: 16.99 seconds
- Speed in km/h: 21.20
- Speed in mph: 13.17
- Speed in m/s: 5.89
The 16.99 seconds per 100 m number is the one that tends to land for people. The world record marathon pace is faster than most people can run a single 100 m — and Sawe held it for 42,195 of them in a row.
Why this pace is even possible
Three things explain how a marathon at 2:49.9/km is humanly possible in race conditions:
- A very large engine. The handful of athletes who race at this level sit at roughly 71 ml/kg/min of VO₂max, with running economy 5–10% better than national-class athletes at the same pace.
- A very high cruising threshold. Sub-2:05 marathoners hold race pace at around 83–92% of their VO₂max, while a typical recreational runner tips over their lactate threshold by 30 km.
- A very efficient shoe. Every recent marathon record — men's and women's — has been set in carbon-plated, highly cushioned racing shoes that have been measured to save 4–5% of the energy cost of running. At elite pace, that's worth 2–3 minutes over 42 km.
A deeper dive on the physiology lives in inside elite marathon training: what it actually takes to run a sub-2, and the shoe story is in super shoes and the sub-2 marathon.
How the WR pace has dropped over the decades
The men's marathon WR pace has come down by roughly 35 seconds per km in 118 years. Each record-holder, and the per-km pace they were running:
| Year | Athlete | Time | Pace per km |
|---|---|---|---|
| 1908 | Johnny Hayes | 2:55:18 | 4:09 |
| 1935 | Sohn Kee-chung | 2:26:42 | 3:28 |
| 1967 | Derek Clayton | 2:09:36 | 3:04 |
| 1999 | Khalid Khannouchi | 2:05:42 | 2:58 |
| 2008 | Haile Gebrselassie | 2:03:59 | 2:56 |
| 2018 | Eliud Kipchoge | 2:01:39 | 2:53 |
| 2023 | Kelvin Kiptum | 2:00:35 | 2:51.5 |
| 2026 | Sabastian Sawe | 1:59:30 | 2:49.9 |
Two patterns jump out. First, the per-km drop has gotten smaller and smaller as the record has moved closer to its physiological floor: nearly 40 seconds per km were lost between 1908 and 1967, and barely 7 seconds in the 47 years since 1999. Second, the entire post-2018 era has played out within a 3-second-per-km band — which is exactly the band where shoe technology, course choice, and the depth of the East African talent pool meet.
For the full history of the record and what each record-holder did to push it, see marathon world records: the fastest humans in history.
A note on the Kipchoge 1:59:40 pace
You will see "marathon world record pace" used to describe Eliud Kipchoge's 1:59:40 from the INEOS 1:59 Challenge in Vienna on October 12, 2019. That pace works out to almost exactly 2:50 per km. It is not, however, the official marathon world record pace — the INEOS run used rotating pacemakers, a pace car, drinks delivered by bike, and a controlled loop course, none of which are permitted under World Athletics record rules.
The official record pace, until April 2026, belonged to Kelvin Kiptum's 2:00:35 in Chicago — 2:51.5 per km. Sawe's 1:59:30 in London is the first sub-2-hour pace ever recorded in legitimate race conditions. For a full breakdown of why Kipchoge's 1:59:40 didn't count, see why Kipchoge's 1:59 didn't count.
Build a pace plan you can actually run
If this page sent you down the rabbit hole of "what pace would I need to break my own goal?", the answer lives in the calculator. Pick a target time, see the per-km pace, and tweak the splits at runpace.co. The world record pace is for Sawe and Assefa. The plan you actually run on race day is for you.