Pace Calculator
Enter any two of distance, time and pace to get the third, plus speed, race-time projections and splits for each kilometre or mile.
Pace /km
5:00
Time (h:mm:ss)
50:00
Distance (km)
10.00
Speed
12.00 km/h
At this pace
- 5K25:00
- 10K50:00
- Half marathon1:45:29
- Marathon3:30:59
Splits
- 1 km5:00
- 2 km10:00
- 3 km15:00
- 4 km20:00
- 5 km25:00
- 6 km30:00
- 7 km35:00
- 8 km40:00
- 9 km45:00
- 10 km50:00
About this tool
Pace — minutes per kilometre or mile — is how runners plan and compare efforts. Knowing your target pace lets you set a watch alert; knowing your finish time from a pace tells you whether a goal is realistic. The calculator solves for whichever value is missing and shows the equivalent speed for treadmill settings.
The projections apply the same pace to 5K, 10K, half marathon (21.0975 km) and marathon (42.195 km). Real race times slow slightly with distance, so treat longer projections as optimistic. Splits list the elapsed time at every kilometre or mile, ready to write on your arm.
Frequently asked questions
- How do I enter the time?
- As h:mm:ss or mm:ss, for example 1:45:30 or 52:10. Pace uses mm:ss.
- Can I switch between kilometres and miles?
- Yes. The toggle converts distance and pace; 5:00 min/km is about 8:03 min/mile.
- What pace do I need for a sub-4-hour marathon?
- Choose Find pace, pick Marathon and enter 4:00:00: about 5:41 per km.