Pace Calculator

Pace, speed and time

Pace is time per unit of distance and speed is distance per unit of time, so they are two ways of saying the same thing. Runners think in pace because it is what you can hold in your head mid-race; cyclists think in speed. Once you know two of the three variables the third is fixed, which is all this tool does.

Using splits properly

The split table shows the clock time you should see at each kilometre if you run perfectly evenly. Most personal bests come from starting a few seconds per kilometre slower than target pace and finishing faster, so treat the even splits as a reference line rather than a rule. Race predictions assume the same pace can be held for the longer distance, which is optimistic beyond about double your current race distance.