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Pace Calculator

Convert time and distance into pace per mile/km and speed.

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Pace / mi
Pace / km
Speed mph
Speed km/h

Race predictions (Riegel)

    Running Pace Guide

    Understanding pace

    • Pace is time per distance (e.g., min/mi). Speed is distance per time (mph or km/h).
    • Use even pacing for steady runs; negative splits for races.

    Tips

    • Practice race pace weekly and include easy recovery days.
    • Account for heat, hills, and terrain when planning pace.

    Predictions

    Riegel formula: T2 = T1 × (D2/D1)^1.06. Predicts times assuming similar fitness and conditions.

    Note

    Estimates are approximations. Adjust for course, weather, and training.