Running Pace Calculator
The running pace calculator converts between any two of the three core running variables: pace (time per unit distance), total distance, and total time. Enter any two values and the third is calculated instantly. Select miles or kilometres as your distance unit. The calculator also projects your finish time at four standard race distances using whatever pace you are running: 5K (3.10686 miles), 10K (6.21371 miles), half-marathon (13.1094 miles / 21.0975 km), and full marathon (26.2188 miles / 42.195 km). These projections assume even-split pacing across the full race, which is a useful planning baseline. In practice, factors such as course elevation, weather, and energy depletion affect real-world finish times. Use this tool to set training targets, plan race strategy, and track your progress as your pace improves over time.
Calculated: --
Race finish estimates at your pace
| Race | Distance | Estimated finish |
|---|---|---|
| Enter your inputs above to see estimates. | ||
Pace formula
Pace = Time / Distance
Time = Pace * Distance
Distance = Time / Pace
Worked example
Distance: 10 km, Time: 55 minutes 00 seconds (3,300 seconds).
- Pace per km = 3,300 / 10 = 330 seconds = 5:30 per km
- Pace per mile = 330 * 1.60934 = 531 seconds = 8:51 per mile
- Speed = 10 / (55/60) = 10.91 km/h
Running pace calculator: frequently asked questions
What is running pace?
Running pace is the time taken to cover one unit of distance, typically expressed as minutes per mile or minutes per kilometre. It is the reciprocal of speed. A pace of 6:00 per mile means you cover one mile every 6 minutes, equivalent to a speed of 10 miles per hour.
How do I convert pace per mile to pace per km?
To convert pace per mile to pace per kilometre, divide the pace in seconds by 1.60934. For example, a 6:00 per mile pace is 360 seconds divided by 1.60934 = 223.7 seconds per km, which is 3 minutes 43.7 seconds per km. This calculator handles the conversion automatically.
What is a good running pace for a beginner?
Beginner runners often start at 11 to 14 minutes per mile (6:50 to 8:42 per km). The most important thing is to run at a conversational pace where you can speak in short sentences. As fitness improves, pace will naturally decrease without additional effort.
How does this calculator estimate race finish times?
Race finish time estimates use the pace you entered and multiply by the standard race distances: 5K (3.10686 miles / 5 km), 10K (6.21371 miles / 10 km), half-marathon (13.1094 miles / 21.0975 km), and full marathon (26.2188 miles / 42.195 km). These are even-pace estimates with no adjustment for fatigue.
What is the difference between pace and speed?
Pace and speed are reciprocals. Speed is distance divided by time (e.g., 10 mph or 16 km/h), while pace is time divided by distance (e.g., 6 min/mile or 3 min 45 sec/km). Runners typically use pace because it directly tells them how long each mile or kilometre will take.
Official sources
- World Athletics technical information: World Athletics.
- USA Track and Field: USATF.org.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. General information only.