Running Pace Calculator
Enter a distance and finish time to get your pace per kilometre and mile, plus average speed in km/h and mph.
Running pace is your finish time divided by the distance, and recreational runners commonly sit around 5:30–7:00 per kilometre (9–11 min/mile) on easy runs.
Understanding your running pace
Pace is simply how long it takes you to cover a set distance, usually expressed as minutes per kilometre or minutes per mile. It's the most practical way to gauge running effort, plan a race, and compare sessions. Enter the distance you ran and your finish time, and this calculator returns pace per kilometre, pace per mile, and average speed in both km/h and mph.
Because one mile is 1.609 kilometres, your per-mile pace is always a bigger number than your per-kilometre pace for the same run. Seeing both side by side is handy when race distances and training plans mix units, which they often do.
Using pace to train and race
To find the pace you need for a goal, divide your target time by the race distance. Want to break two hours in a half marathon? That's about 5:41 per kilometre for the full 21.1 km. Working backwards from a goal like this turns a vague ambition into a concrete number you can practise at.
Most training plans mix paces on purpose: easy runs build your aerobic base and should feel conversational, while shorter intervals at a faster pace build speed. Tracking pace over weeks shows whether your training is working, though remember that heat, hills, and wind all slow you down on a given day. Stay on top of hydration too — our water intake calculator gives a daily baseline.
Pace and speed conversions
| Per kilometre | Per mile | Speed |
|---|---|---|
| 4:00 | 6:26 | 15.0 km/h · 9.3 mph |
| 4:30 | 7:14 | 13.3 km/h · 8.3 mph |
| 5:00 | 8:03 | 12.0 km/h · 7.5 mph |
| 5:30 | 8:51 | 10.9 km/h · 6.8 mph |
| 6:00 | 9:39 | 10.0 km/h · 6.2 mph |
| 6:30 | 10:28 | 9.2 km/h · 5.7 mph |
| 7:00 | 11:16 | 8.6 km/h · 5.3 mph |
Based on 1 mile = 1.609 km.
Pace needed for common goal times
| Goal | Pace per km | Pace per mile |
|---|---|---|
| 5K in 25:00 | 5:00 | 8:03 |
| 5K in 30:00 | 6:00 | 9:39 |
| 10K in 50:00 | 5:00 | 8:03 |
| 10K in 60:00 | 6:00 | 9:39 |
| Half marathon in 2:00:00 | 5:41 | 9:09 |
| Marathon in 3:30:00 | 4:59 | 8:01 |
| Marathon in 4:00:00 | 5:41 | 9:09 |
Even splits over the official distance (5 km, 10 km, 21.0975 km, 42.195 km) — plan a touch faster to bank for water stops and corners.
Why holding the goal pace still misses the goal time
That table assumes you cover exactly the official distance. Almost nobody does. Certified courses are measured along the shortest route a runner could legally take — tight to every corner, cutting every tangent. In an actual race you drift wide on bends, weave through a field, cross to a water table and back again. Your watch then adds its own error on top. So the distance you really cover, and the distance your watch reports, are both normally a little longer than the one on the entry form.
Hold the table's pace exactly and that extra distance becomes time you never budgeted for. For a four-hour marathon at 5:41 per kilometre:
| If your watch reads | Distance covered | Finish at 5:41/km | Late by |
|---|---|---|---|
| 0.5% long | 42.41 km | 4:01:12 | 1:12 |
| 1.0% long | 42.62 km | 4:02:24 | 2:24 |
| 1.5% long | 42.83 km | 4:03:36 | 3:36 |
| 2.0% long | 43.04 km | 4:04:48 | 4:48 |
Finish time is the distance actually covered multiplied by the target pace. The pace itself is never missed in any of these rows.
The pace was not wrong. It was correct for 42.195 km, and you ran 42.62.
The part worth internalising is how the same error behaves at different distances. The pace correction is always the same fraction — one per cent of your pace, about three seconds per kilometre at the paces in these tables — however far you are running. What that one per cent costs you at the finish line is not constant at all. It grows with the distance.
| Race | Goal | Pace in the table | Late by, on a 1% long reading | Pace to target instead |
|---|---|---|---|---|
| 5K | 25:00 | 5:00 | 0:15 | 4:57 |
| 10K | 50:00 | 5:00 | 0:30 | 4:57 |
| Half marathon | 2:00:00 | 5:41 | 1:12 | 5:38 |
| Marathon | 4:00:00 | 5:41 | 2:24 | 5:38 |
All four rows carry the identical 1% distance error and the identical 1% pace correction — which works out near three seconds per kilometre at both of these paces. Only the consequence differs.
Three seconds per kilometre is under what most runners can feel, and no watch display will flag it. Over 5 km it costs fifteen seconds, which is nothing. Over a marathon the same invisible error costs nearly two and a half minutes, which is the difference between a time you wanted and a time you settle for. Long races do not punish bigger mistakes; they punish the same mistake for longer.
Two things follow. Set your target a few seconds per kilometre under the even-split figure rather than exactly on it, and run the tangents deliberately, because the overage is partly a route you chose rather than a fault in the watch. And judge your progress against the course markers, not your wrist: if the watch reads one per cent long, it will announce the marathon distance about 420 metres before you reach the finish line, and every kilometre split it has shown you along the way was measured over slightly more ground than the course allows.
Conversions use 1 mile = 1.609344 km. Pace and speed are computed directly from your inputs.
Frequently asked questions
How do I calculate running pace?
Pace is your finish time divided by the distance. Enter a distance and a time and this calculator returns your pace per kilometre and per mile, plus average speed in km/h and mph. It works for any distance, from a track rep to a marathon.
What is a good running pace?
It depends entirely on fitness, distance, and terrain, so there is no universal "good" pace. A more useful approach is to track your own pace over time and aim for gradual improvement. Many recreational runners jog somewhere around 6 to 7 minutes per kilometre.
How do I convert pace between km and miles?
One mile is 1.609 kilometres, so pace per mile is always a larger number than pace per kilometre for the same effort. This tool shows both at once, so you do not need to convert manually.
What pace do I need for a target finish time?
Divide your goal time by the race distance to get the required pace. For example, a sub-2-hour half marathon (21.1 km) needs about 5:41 per kilometre. Enter your target time and the distance here to see the exact pace you would need to hold.
What is a good average running pace?
Recreational runners commonly sit between about 5:30 and 7:00 per kilometre (9–11 min/mile) on easy runs. Pace is personal — terrain, heat and fitness move it a lot — so a better benchmark is whether your easy pace lets you hold a conversation, and whether it trends faster over months of training.
Sources
- World Athletics — Marathon (Road Running discipline) — Official marathon distance 42.195 km
- NIST Special Publication 811, Appendix B.9 — Conversion Factors — Mile = 1.609344 km exactly
- NHS — Physical activity guidelines for adults aged 19 to 64 — Running as vigorous aerobic activity
- ODPHP/HHS — Physical Activity Guidelines for Americans (2nd ed.) — US aerobic activity guidance for adults
The thresholds and formulas used by this calculator follow the primary sources above. This tool provides general information, not personalised medical advice.