Running Pace Calculator
Calculate running pace, predict race times for 5K, 10K, half marathon, and marathon using Riegel's formula. Get personalized training zone recommendations.
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Enter a Race Result
How to Use the Running Pace Calculator
- Enter a race distance and your finish time.
- Click Calculate to see your pace and speed.
- View predicted finish times for other race distances.
- Use training zones to guide your workout intensity.
About the Predictions
- Race predictions use Riegel's formula (T2 = T1 × (D2/D1)^1.06)
- Training zones are calculated relative to your race pace
- Predictions are most accurate for well-trained runners
- Results improve when using a recent race time as input
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Disclaimer: This tool is provided as-is for informational and educational purposes only.