Race Time Predictor

This tool uses the scientific Riegel formula to predict your time at a new distance based on your performance at another distance. The formula accounts for the fact that pace slows as distance increases.

1. 1

   Enter Previous Race

   Input the distance and time of a race you completed

2. 2

   Set Target Distance

   Select the distance you want to predict

3. 3

   View Prediction

   The tool calculates your predicted time and pace

• 1

  Use a recent race result (within 2-3 months)

• 2

  Predictions are more accurate between similar distances

• 3

  Distance-specific training improves actual results

• 4

  Weather and course affect actual performance

• Using training run results instead of actual race results

• Predicting marathon from only a 5K race

• Ignoring the need for distance-specific training

• Expecting major improvements without additional training