What’s your pace? This free pace calculator turns a distance and time into your pace per kilometre and per mile, plus speed in km/h and mph – with quick buttons for 5K, 10K, half and marathon.
Enter the distance you covered and how long it took. Pace and speed are calculated for both kilometres and miles.
Pace is your time per unit of distance (lower is faster); speed is distance per hour. Tap the unit button to switch the headline pace between km and miles.
How the Pace Calculator Works
The Pace Calculator turns a distance and a finish time into your pace per kilometre and per mile, plus your average speed – useful for checking a training run, planning a race split, or comparing effort across different distances.
Formula: Pace (per km) = Total time ÷ Distance in km, and Pace (per mile) = Total time ÷ Distance in miles. Speed (km/h) = Distance in km ÷ (Total time ÷ 3600), and Speed (mph) = Distance in miles ÷ (Total time ÷ 3600). Distance is converted between km and miles using 1 mile = 1.609344 km.
- Distance — the length of the run or walk you covered, entered in kilometres or miles (toggle the unit button, or use the 5K/10K/Half/Marathon quick-distance buttons)
- Time (h : m : s) — the total hours, minutes and seconds it took to cover that distance
- Unit toggle — switches whether the headline pace and speed are shown per kilometre or per mile
Example Scenarios
| Distance | Time | Pace per km |
|---|---|---|
| 5 km | 0:25:00 | 5:00 /km |
| 10 km | 0:45:00 | 4:30 /km |
| 3 km | 0:12:00 | 4:00 /km |
| 21.0975 km (Half) | 1:45:00 | 4:59 /km |
| 42.195 km (Marathon) | 4:00:00 | 5:41 /km |
Pace Calculator FAQ
What does a “5:00 per km” pace mean?
It means covering one kilometre takes five minutes at a steady effort – so 5 km would take about 25 minutes and 10 km about 50 minutes at that same pace.How do I convert a running pace into speed?
Divide 60 by your pace in minutes per km (or mile) to get km/h (or mph). A 5:00/km pace equals 60÷5 = 12 km/h.Why is my pace per mile slower-looking than my pace per km?
A mile (1.609 km) is longer than a kilometre, so it takes more time to cover, making the per-mile pace number larger even though your actual speed hasn’t changed.What pace do I need to finish a marathon in under 4 hours?
You’d need to average roughly 5:41 per km (about 9:09 per mile) across the full 42.195 km marathon distance, though real pacing usually varies between early and late miles.Is pace or speed the better way to track training?
Pace (time per distance) is usually easier to read on a track or race split, while speed (distance per hour) is more common in cycling; the calculator gives you both so you can use whichever fits the activity.Can I use this pace calculator for walking as well as running?
Yes – enter whatever distance and time you covered on foot, whether walking, jogging or running; the calculator only does time-and-distance math and doesn’t judge the activity type.Related Calculators
If you’re pairing running with other cardio, the Cycling Distance Calculator uses the same distance-time-speed math for rides, while the VO2 Max Estimator and Heart Rate Zone Calculator can help you gauge the aerobic effort and training intensity behind that pace.