Running Pace & Race Predictor
Calculate running pace, predict race finish times using Riegel's formula, and get 5K/10K splits.
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Quick Summary: Running Pace & Race Predictor
To find your running pace in FY 2026-27, divide total duration by distance. Use Riegel's Formula [T2 = T1 * (D2/D1)^1.06] to predict your Half-Marathon or Marathon finish time based on your 5K or 10K performance.
How to use the Running Pace & Race Predictor
- 1
Enter Distance & Time
Input your past race distance (e.g., 5K) and your finish time.
- 2
Predict Race
Select the future race distance you want to predict (e.g., 21.1K Half-Marathon).
- 3
View Splits
Get a detailed breakdown of the required kilometer-by-kilometer pace to hit your target goal.