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Conditioning · Riegel

Pace & Race Predictor

Turn one finish time into your pace, speed, and equivalent times from the mile to the marathon.

Finish time
Show pace per

Pace · per mile

8:03/mi

That's 25:00 for 5K.

Splits & speed

Per mile8:03 /mi
Per kilometre5:00 /km
Speed7.46 mph · 12 km/h

Equivalent race times

DistancePredictedPace / mi
1 mile7:317:31
5K25:008:03
10K52:078:23
Half marathon1:55:008:46
Marathon3:59:479:09

Riegel's model (T₂ = T₁ · (D₂/D₁)^1.06). Accurate for well-paced efforts; it assumes even fitness across distances.