RACE TIME PREDICTOR

Predict your potential race times for different distances based on your recent performance

Recent Race Distance

Hours

Minutes

Seconds

How It Works

This calculator uses the Riegel formula to predict race times based on your recent performance:

Enter the distance and time from a recent race
Get predicted times for 5K, 10K, Half Marathon, and Marathon
Results are estimates based on equivalent effort levels
Actual performance may vary based on training, conditions, and terrain