🏃 Running Pace Calculator
Enter any two of pace, time and distance, and get the third — with your pace in both min/km and min/mile, and your speed in km/h and mph.
Pace
5:00 /km
8:03 /mi
Speed
12.00 km/h
7.46 mph
Pace = time ÷ distance. Enter a marathon time to see the pace you need to hold, or a pace to project a finish time. 🔒 In your browser.
How the running pace calculator works
Pace is simply time divided by distance. Give the tool a distance and a finish time and it returns your pace and speed; give it a distance and a target pace and it projects your finish time; give it a time and a pace and it works out how far you'd go. Times are entered as mm:ss or h:mm:ss, and the distance presets cover the common race distances.
Use it to find the pace you need to hit a goal time — enter the marathon distance and your target time to see the min/km you must hold. Race pace and training pace differ, so treat a projected time as a best-case even effort.
Frequently asked questions
How do I calculate running pace?
Divide your time by the distance. For 10 km in 50 minutes, pace = 50 ÷ 10 = 5:00 per km (about 8:03 per mile). Enter the distance and time and the tool shows both, plus your speed.
What pace do I need for a sub-4-hour marathon?
A 4-hour marathon is about 5:41 per km (9:09 per mile). Enter the marathon distance (42.195 km) and a 4:00:00 target time and the tool gives the exact pace to hold.
How do I convert between min/km and min/mile?
A mile is 1.609 km, so a per-mile pace is about 1.609 times the per-km pace. This tool shows both at once; there's also a dedicated pace converter for speeds.
What is a good running pace?
It's very individual. Many recreational runners cover 5K around 6:00–7:00 per km (about 9:40–11:15 per mile); trained runners are faster. Use your own recent times as the baseline and aim to improve gradually.
How do I use pace to hit a goal time?
Enter the race distance and your goal finish time in "find pace" mode — the tool returns the even pace you'd need to hold the whole way. Then practise running at that pace in training.