Know your pace. Ship the race.

Convert pace, distance and finish time in seconds, then predict your next race off any recent result.

Pick with what you know.

Find Pace Find Time Find Distance

Enter distance + running time.

Distance

Time (h:m:s)

Race distance preset

5K 10K Half Marathon

Distance

Pace (min per km)

Time (h:m:s)

Pace

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per km
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Enter any recent race result. We predict the others with the Riegel formula (t₂ = t₁ × (d₂/d₁)^1.06).

Recent race distance

Recent race time (h:m:s)

Pace Table

Finish times for 5K, 10K, half and full marathon at common per-km paces (min per km).

Pace /km	5K	10K	Half	Marathon