Running pace calculator
Calculate pace, time or distance for running using kilometers, minutes per kilometer and km/h.
Running pace calculator
What the running pace calculator shows
The running pace calculator shows pace in min/km, equivalent speed in km/h and, depending on the selected mode, total time or distance. It helps connect distance, time and pace in one calculation.
How to use the calculator
Choose whether you want to calculate pace, time or distance. Enter the two values you already know, such as distance and time, and the calculator solves the remaining value.
Pace, time and distance
- Pace tells how long one kilometer takes.
- Time is the total duration of the run.
- Distance is the length of the run in kilometers.
- Speed in km/h describes the same effort as kilometers per hour.
Examples
- 10 km in 50:00 → pace 5:00 min/km and speed about 12.0 km/h.
- 5 km at 4:30 min/km → time 22:30.
- 45:00 at 5:00 min/km → distance 9.0 km.
- Half marathon at 5:00 min/km → about 1 h 45 min 29 s.
Units and common distances
The calculator uses kilometers, minutes per kilometer and kilometers per hour. You can choose 5 km, 10 km, half marathon or marathon, or enter a custom distance.
Limitations
The calculator is a math helper for pace, time and distance. It is not a training plan, coaching advice, medical advice, GPS measurement or official race prediction. Terrain, weather, stops and measurement error can all affect real-world pace.
FAQ
What does 5:00 min/km mean?
It means each kilometer takes five minutes.
Can I calculate finish time from pace?
Yes. Choose time mode, enter distance and pace, and the calculator shows the total time.
Is the result training advice?
No. The result is a mathematical calculation, not a training plan or advice about a suitable pace.
How can air quality affect outdoor running?
Air pollution is inhaled during physical activity, and a harder or longer run can increase the amount of polluted air taken in. Responses vary, and people with respiratory or heart conditions may be more sensitive. Checking local air quality before a run can help; when air quality is poor, general options include reducing intensity or duration, changing the route or time, or exercising indoors. Check current air quality for your city on City Air Quality.