Pace, time, and distance
Time = pace × distance. Pace = time ÷ distance. Distance = time ÷ pace. A 5 km in 27:30 is 5:30 per kilometre. For miles, enter the distance in miles and read pace as per mile — the math is the same.
Common questions
Is this race-accurate?
It assumes even splits. Hills, wind, and starting too fast change the real finish.
How do I do a half marathon?
Enter 21.0975 km and either your goal time or your training pace.