Pace Converter (min/km, min/mile, km/h, mph)
Enter a pace or speed to see it in every format, with race finish times.
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Pace Converter (min/km, min/mile, km/h, mph) by TheCalcTools
How the Pace Converter (min/km, min/mile, km/h, mph) works
Pace is time per distance and speed is distance per time, so one is the reciprocal of the other. A mile is exactly 1.609344 km.
Race times multiply the pace in seconds per km by the race distance: 5 km, 10 km, 21.0975 km for a half marathon and 42.195 km for a marathon. Seconds in the paces shown are rounded down.
The formula
Worked example
Using the default values shown in the calculator:
| Pace minutes | 5 |
|---|---|
| Pace seconds | 30 |
| Per | per kilometre |
- 5:30 per km = 330 seconds per km.
- That is 8:51 min/mile, 10.91 km/h or 6.78 mph.
- A 10K at this pace takes 55.0 minutes; a marathon 3.87 hours.
Result:
| Pace per km | 5:30 min/km |
|---|---|
| Pace per mile | 8:51 min/mile |
| Speed (km/h) | 10.91 |
| Speed (mph) | 6.78 |
| 5K finish (minutes) | 27.5 |
| 10K finish (minutes) | 55.0 |
| Half marathon (hours) | 1.93 |
| Marathon (hours) | 3.87 |
Frequently asked questions
What pace is a 4-hour marathon?
About 5:41 per km or 9:09 per mile.
Why are the race times decimals?
They are in minutes or hours as decimals; 27.5 minutes is 27 minutes 30 seconds. Use the running pace calculator for hours, minutes and seconds.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.