Pace Calculator
Running pace and speed from distance and time, a finish time from a pace, or the distance, with even splits.
Your run
Filled in with example values. Replace them with your own.
Results update as you type.
Result
5K: 5 km (3.11 mi) in 25:00: 5:00 per km, 8:03 per mile, 12 km/h
Pace
5:00per km
- Pace per km
- 5:00
- Pace per mile
- 8:03
- Speed
- 12 km/h · 7.46 mph
- Time
- 25:00
- Distance
- 5 km · 3.11 mi
Even splits
| Km | Elapsed time |
|---|---|
| 1 | 5:00 |
| 2 | 10:00 |
| 3 | 15:00 |
| 4 | 20:00 |
| 5 | 25:00 |
How it’s calculated
Pace
25:00 ÷ 5 km = 5:00 per km
Speed
5 km ÷ 0.417 h = 12 km/h
1 mile = 1.609344 km. Times are rounded to the nearest second.
How the pace calculator works
Distance, time and pace are linked, so knowing any two gives the third. Pick what you want to work out: your pace and speed from a run, your finish time at a target pace, or how far you get in a set time at a given pace.
Distances can be in kilometres or miles, and the pace is shown per km and per mile, with even splits.
The formula
Pace = Time ÷ Distance
Time = Pace × Distance
Distance = Time ÷ Pace
Speed = Distance ÷ Time
1 mile = 1.609344 km exactly.
Worked examples
- 5 km in 25:00: 25 minutes ÷ 5 = 5:00 per km, or 8:03 per mile, a speed of 12 km/h (7.46 mph).
- A marathon at 5:00 per km: 5 minutes × 42.195 = 210.98 minutes, a finish time of 3:30:59.
- A half marathon at 8:00 per mile: 13.11 miles × 8 minutes = 1:44:53.
- 1 hour at 6:00 per km: 60 ÷ 6 = 10 km.
Assumptions
- The pace is the same over the whole distance.
- Times are worked exactly and rounded to the nearest second only for display.
- Hills, wind, weather and stops are not taken into account.
Frequently asked questions
What is the difference between pace and speed?
Pace is the time it takes to cover one unit of distance, such as 5:00 per km. Speed is the distance covered in a unit of time, such as 12 km/h. They describe the same thing the other way round; runners usually use pace, cyclists speed.
How long are a half marathon and a marathon?
A marathon is 42.195 km (about 26.2 miles) and a half marathon half of that, 21.0975 km (about 13.1 miles). The race buttons fill these in exactly.
What are even splits?
The time on the clock at each kilometre or mile if you keep exactly the same pace throughout. Real races rarely go that evenly, but the splits are a handy target.
Can I use it for walking or cycling?
Yes. The maths is the same for any activity: enter the distance and time, or the pace you expect.