Running Pace Calculator
Work out your running pace from any distance and time. Enter how far you ran and how long it took, and the calculator gives your pace per kilometer and per mile, your speed, and your predicted finish times for the 5K, 10K, half marathon, and marathon at that pace.
Your pace
6:00/km
9:39 /mi
How to Use
Enter the distance you ran, choose kilometers or miles, and enter your time in hours, minutes, and seconds. The calculator instantly shows your pace (min/km and min/mi), your speed (km/h and mph), and a table of race finish times you'd hit if you held that pace. Use it to set a goal pace or check what a target race time requires.
Why This Tool Is Useful
Pace is the language of running — every training plan and race goal is built around it. This calculator converts a run into pace and speed, and projects it onto standard race distances so you can see, for example, what a 5:00/km easy run implies for a marathon. It's useful for setting goal paces, planning race strategy, and understanding training zones.
How Running Pace Is Calculated
Pace is simply time divided by distance, expressed as minutes per kilometer or per mile. If you run 5 km in 25 minutes, your pace is 25 ÷ 5 = 5:00 per km. Speed is the inverse — distance over time — usually shown in km/h or mph.
Pace is more useful than speed for runners because it directly answers 'how long will this distance take?' and is easy to hold steady on a watch.
Pace vs Speed
They describe the same effort differently. Pace (min/km) goes down as you get faster; speed (km/h) goes up. Runners almost always think in pace, while treadmills and cyclists tend to use speed. This calculator shows both so you can switch easily.
Predicting Race Finish Times
If you could hold a given pace for the whole distance, your finish time is just pace × distance. The results table does this for the four most common race distances. In reality, most runners slow over longer distances, so your true marathon pace will be a bit slower than your 5K pace — use these as best-case targets and adjust with training.
Common Pace-to-Finish-Time Reference
The table below shows finish times for popular paces, so you can quickly see what pace a goal time needs.
Tips for Pacing a Race
A few pacing pointers:
- Aim for even or slightly negative splits — start controlled, finish strong.
- Your easy/training pace should be noticeably slower than race pace.
- Account for hills, heat, and wind, which all slow your real pace.
- Practice goal race pace in training so it feels familiar on race day.
Finish Times by Pace
| Pace (min/km) | 5K | 10K | Half | Marathon |
|---|---|---|---|---|
| 4:00 | 20:00 | 40:00 | 1:24:23 | 2:48:47 |
| 5:00 | 25:00 | 50:00 | 1:45:29 | 3:30:59 |
| 6:00 | 30:00 | 1:00:00 | 2:06:35 | 4:13:10 |
| 7:00 | 35:00 | 1:10:00 | 2:27:41 | 4:55:22 |