Pace to Speed Converter
Convert running pace (min/km) to speed (km/h) and vice versa instantly.
How to use this tool
- Enter pace — minutes and pace — seconds in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your speed and the full breakdown beneath it.
Enter your running pace in minutes and seconds per kilometre to get your equivalent speed in km/h. Useful when comparing treadmill settings with outdoor running pace.
Formula
Speed (km/h) = 60 ÷ Pace (min/km)
Pace (decimal min/km) = Pace minutes + Pace seconds ÷ 60
How it works
Running pace (minutes per kilometre) and speed (kilometres per hour) are reciprocal measures: speed equals 60 divided by the decimal pace, because there are 60 minutes in an hour.
The calculator first converts the minutes-and-seconds pace entry to a decimal minute value, then applies the reciprocal relationship. The conversion is exact and assumes constant effort over a flat course.
Worked example
Worked example
- Pace entry: 5 min 30 sec.
- Decimal pace = 5 + 30 ÷ 60 = 5.5 min/km.
- Speed = 60 ÷ 5.5 ≈ 10.91 km/h.
Speed = 10.91 km/h; decimal pace = 5.5 min/km
Key terms
- Pace (min/km)
- The time a runner takes to cover one kilometre; the primary unit used in recreational running.
- Speed (km/h)
- Distance covered per hour; the reciprocal measure of pace, more commonly used in cycling and motorsport.
- Reciprocal relationship
- When two quantities multiply to a constant (here, pace × speed = 60), they are reciprocals of each other.
- Decimal pace
- Pace expressed as a single decimal number of minutes (e.g. 5.5 min/km) rather than minutes and seconds, for arithmetic convenience.
- Constant-effort assumption
- The conversion treats pace and speed as fixed values; in practice both vary with terrain, fatigue, and conditions.
Frequently asked questions
- How do I convert pace to speed?
- Speed (km/h) = 60 ÷ pace (min/km). For example, 5:00/km = 60 ÷ 5 = 12 km/h.
- How do I convert speed to pace?
- Pace (min/km) = 60 ÷ speed (km/h). At 10 km/h, pace = 60 ÷ 10 = 6:00/km.