Features
- Predict times for 5K, 10K, Half Marathon, and Marathon
- Uses the published Riegel distance relationship
- Import your best race from Strava automatically
- See equivalent times across all standard distances
- Shows assumptions and limitations
How It Works
Enter a recent race time or connect Strava to select a suitable performance. The calculator uses the Riegel relationship T2 = T1 × (D2/D1)^1.06, plus the training variables you provide. The output is an estimate rather than a calibrated probability forecast.
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?
Use it as a planning estimate. A recent all-out result at a nearby distance is more informative, while weather, terrain, pacing, fueling and distance-specific training can materially change the outcome.
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 Time Predictor Free
Manual calculators work immediately. Connected analysis requires sign-in and available Strava data.
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