Running pace calculator
Enter a distance and time to get pace per km and per mile, speed, splits and race predictions.
FAQ
How is running pace calculated?
Divide your time by the distance. 10K in 50:00 is 3000 s ÷ 10 = 5:00 per km, or 8:03 per mile (1 mile = 1.609 km).
What pace is a sub-4 marathon?
Under 5:41 per km (9:09 per mile). A sub-2 half marathon is 5:41/km, and a 50-minute 10K is 5:00/km.
Are the race predictions accurate?
Riegel's formula works well between similar distances. Predicting a marathon from a 5K overestimates if your long runs are short.
Training for a race? The marathon training plan generator turns your time into a week-by-week plan. Need to settle who buys coffee after the long run? Spin the Wheel.