Wondering how fast you can run a marathon based on your recent 10K? Our Race Time Predictor uses Riegel's Formula to estimate your potential performance across different distances. It's a powerful tool for setting realistic race goals.
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Race Time Predictor
Predict your race time based on a recent performance.
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Previous Performance
Predicted Time
Estimated Finish
52m 7s
Pace: 5:13/km
How it Works
This tool uses Riegel's Formula, widely accepted as the standard for race time prediction.
T2 = T1 × (D2 / D1)^1.06
Note: Predictions become less accurate as the difference between the two distances increases (e.g., predicting a Marathon from a 100m sprint).
About Predict Your Race Performance
1
Recent Race
Enter the distance and time of a recent race you completed.
2
Target Race
Select the distance you want to predict (e.g., Marathon).
3
Analyze
View your predicted finish time and required pace.
Key Features
Riegel's Formula
Uses the industry-standard formula for performance prediction.
Custom Distances
Predict times for standard races or custom distances.
Pace Estimation
Provides the target pace needed to achieve the predicted time.
Frequently Asked Questions
It's a statistical estimate. Proper training for the specific distance is still required to achieve the predicted time.
Technically yes, but predictions are most accurate when the distances are closer (e.g., Half Marathon to Marathon).
We use Peter Riegel's formula: T2 = T1 * (D2 / D1)^1.06.
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