Pace Calculator
Convert time and distance into pace per mile/km and speed.
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Results
Pace / mi
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Pace / km
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Speed mph
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Speed km/h
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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.