Tools / Race time predictor
Free tool
Race predictor.
Turn one recent race into a fair guess at the other three. Use a race from the last couple of months, run all-out.
| Race | Predicted | Pace /km |
|---|---|---|
| 5K | 25:00 | 5:00 |
| 10K | 52:07 | 5:13 |
| Half marathon | 1:55:00 | 5:27 |
| Marathon | 3:59:47 | 5:41 |
Uses Riegel's formula. Predictions assume you've trained for the distance; going up to a marathon from a 5K usually runs a few minutes slower than this.