Running pace conversion: min/mile, min/km and speed
Convert running pace between miles and kilometers, read clock notation correctly and calculate constant-pace finish times.
Pace measures time; speed measures distance
Pace tells you how long one unit of distance takes. Speed tells you how much distance you cover in a unit of time. A pace of 6:00 per kilometer equals 10 km/h. Faster running produces a smaller pace number and a larger speed number.
To convert minutes per kilometer to minutes per mile, multiply by 1.609344. Reverse the conversion by dividing. Work with the full numeric value and round only when displaying minutes and seconds.
A compact conversion chart
A 4:00/km pace is about 6:26/mile and gives a 20:00 5K. At 5:00/km, the equivalents are 8:03/mile and a 25:00 5K. At 6:00/km, they are 9:39/mile and 30:00. At 7:00/km, they are 11:16/mile and 35:00.
These examples use clock notation. Six minutes thirty seconds is 6.5 decimal minutes, not 6.30. In the calculator, enter minutes and seconds in their separate fields to avoid that ambiguity.
Use finish-time comparisons carefully
Multiplying average pace by a target distance gives the time needed at an unchanged pace. The calculator uses 5 km, 10 km, 21.0975 km and 42.195 km for its comparison rows. A 6:00/km pace would take 1:00:00 for 10K.
The same arithmetic does not establish your likely marathon performance. It does not know your endurance, course, weather or pacing strategy. Use the comparison to understand a time target, and keep moving-time and elapsed-time definitions consistent across runs.
Try it with your own inputs.
Explore the example, then change one input at a time to see how the estimate responds.
Open running paceReferences & method notes
- NIST SP 811 — Unit conversion factors ↗
Exact unit conversions. Step, pace and time examples are StrideCalc arithmetic using the stated inputs, not physiological findings.
Examples are calculations performed with StrideCalc’s stated models. Editorial explanations are educational and have not undergone independent medical review. Read our methodology and limits.
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