Racing smarter
What pace is a 25-minute 5K?
25:00 for the 5K is 5:00/km (8:03/mi), held the whole way. Halfway on even pace is 12:30. Most watches measure the course long, so the pace you actually need on the screen is nearer 4:56/km.
| What | Number | The qualifier |
|---|---|---|
| Pace needed | 5:00/km (8:03/mi) | even, start to finish |
| Halfway (even) | 12:30 | 12:45 on a 2% negative split |
| Watch pace at 1.5% overage | 4:56/km (7:56/mi) | what the screen has to show |
| Distance | 5 km (3.11 mi) | the measured course, not the watch |
What pace is a 25-minute 5K?
25:00 over 5 km (3.11 mi) is 5:00/km (8:03/mi), held from the first step to the last. There is no rounding slack in that number: run the first kilometre at 5:10/km and you have already spent ten seconds you will not get back cheaply.
25 minutes is 5:00/km (8:03/mi), the neatest number in the sport, and a very common goal for someone six months into running. It usually arrives about the time a runner can hold 5:30/km comfortably for 8 km. The thing worth knowing about this target is that it is more often reached by adding easy volume than by adding speed sessions. Most people at 26 or 27 minutes are not short of top-end speed; they are short of the aerobic base that lets them hold a hard effort for the last 2 km. Two extra easy runs a week for six weeks moves this number more reliably than a weekly interval session does.
What the splits look like
| Kilometre | Split | Elapsed |
|---|---|---|
| 1 | 5:00 | 5:00 |
| 5 | 5:00 | 25:00 |
And in miles, for a course measured that way:
| Mile | Split | Elapsed |
|---|---|---|
| 1 | 8:03 | 8:03 |
| 3 | 8:03 | 24:08 |
| 3.11 | 0:52 | 25:00 |
Where should I be at halfway?
Even pace puts you through halfway at 12:30. Most people who finish this time went through slightly slower than that, not faster — a 2% negative split means halfway at 12:45 and a second half of 12:15.
The decision rule for race day: if you reach halfway more than 0:15 ahead of 12:30, you are not ahead of schedule, you are borrowing. Ease back to 5:00/km (8:03/mi) and hold it.
What if my watch measures the course long?
Almost every watch does. A 5K that reads 1.5% long on your wrist means you have to run 4:56/km by the watch to finish in 25:00 by the clock. That is the pace to put on the screen, and it is why pacing off a watch's average-pace field alone tends to leave people a minute or two short.
Questions runners actually ask
- Is a 25-minute 5K a good time?
- Good is a comparison, and it depends who with. Whether it is achievable for you is the answerable question: it comes down to a recent race, your weekly volume and your longest run. The race predictor puts numbers on all three.
- Should I run even splits or negative splits?
- Even, planned; slightly negative, executed. Going through halfway 1-2% slower than even pace costs almost nothing if you are strong at the end, and saves the race if you are not.
Sources
- Hanley B et al. Pacing profiles of senior athletes at the World Athletics Championships. Front Sports Act Living 4:964905, 2022 primary
- Deaner RO et al. Men are more likely than women to slow in the marathon. Med Sci Sports Exerc 47(3):607-616, 2015 primary
- World Athletics Competition Rules, Book C2.1 — course measurement and the short course prevention factor reference
Changelog
- — First published.