Features
- Predict times for 5K, 10K, Half Marathon, and Marathon
- Uses the scientifically-validated Riegel formula
- Import your best race from Strava automatically
- See equivalent times across all standard distances
- Calculate your VDOT running fitness score
How It Works
Enter a recent race time or connect Strava to import your best performance. The calculator uses Pete Riegel's formula (T2 = T1 × (D2/D1)^1.06) to predict times at other distances. For Strava users, we auto-detect your races and use your best performance for predictions.
Benefits
- Set realistic race goals backed by science
- Identify which race distance suits you best
- Track your fitness progression over time
- Plan your training paces accurately
Frequently Asked Questions
How accurate is the Race Predictor?
The Riegel formula is highly accurate for well-trained runners. Predictions assume similar training and racing conditions across distances.
Do I need a Strava account?
No! You can manually enter any recent race time. Strava integration just makes it easier by finding your best races automatically.
Try Race Predictor: Free AI Tool for Marathon & 10K Finish Times Free
No signup required. Connect Strava for personalized insights.
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