Pace Calculator
Enter any two of distance/time/pace for the third, plus Riegel-based predictions at classic race distances.
Your pace
5:12 /km · 11.54 km/h
Base pace 5:12/km.
| Race | Predicted time |
|---|---|
| 5k | 0:24:56 |
| 10k | 0:52:00 |
| Half marathon | 1:54:44 |
| Marathon | 3:59:13 |
How the Pace Calculator works
The calculation follows the standard method used across the US — no shortcuts, no hidden assumptions. Here is exactly what happens behind the scenes:
Frequently Asked Questions
How does the Pace Calculator work?
Enter your numbers above and results update instantly using standard formulas, computed entirely on your device.
Is the Pace Calculator free to use?
Yes — completely free with no signup required, and it works on phones, tablets, and desktops.
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