Pace Calculator (Running Pace, Time and Distance)
Solve for pace, finish time or distance, with 5K, 10K, half and full marathon presets.
Pace = time ÷ distance. A 5K run in 25:00 is a pace of 5:00 per km, or 8:03 per mile, which is 12 km/h (7.46 mph).
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How to use it
- Choose what to solve for: pace, time or distance.
- Enter the other two values, or tap a race preset.
- Read pace per km and per mile, speed and finish times at the same pace.
What you enter
- Two of: distance, time, pace
What you get
- Pace per km and mile
- Finish time
- Speed
- Equivalent race times
Formula
Pace = time ÷ distance | Time = pace × distance | Speed (km/h) = 60 ÷ pace (min/km)
Worked example
Input: 5 km in 25:00
Result: 5:00/km, 8:03/mile, 12.0 km/h
Holding that pace gives a 10K in 50:00 and a half marathon in 1:45:29.
Questions
How do I calculate my running pace?
Divide total time by distance. 50 minutes for 10 km is 5:00 per km. Divide by 1.609 to go from per-mile to per-km pace.
What pace do I need for a sub-4-hour marathon?
5:41 per km or 9:09 per mile, held for all 42.195 km.
What is a good 5K time?
For recreational runners, 25–35 minutes is common. Under 25 minutes is strong for most age groups; elite men run under 13 minutes.
How do I convert min/km to min/mile?
Multiply the pace in minutes per km by 1.609. 5:00/km × 1.609 = 8:03/mile.
Limitations
- Race-time projections assume the same pace, which gets harder over longer distances.
References
- Riegel PS (1981) American Scientist 69(3):285-290.
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