Enter a recent race result and we'll predict your finish times at other distances using the Riegel formula — the same method used by elite coaches worldwide.
Your Recent Race
Using the Riegel Formula (T2 = T1 × (D2/D1)^1.06), trusted by coaches and athletes worldwide.
Based on your 5K
Pace
5:00 /km
Marathon
3:59:46
Half Marathon
1:55:00
| Distance | Predicted Time | Pace /km |
|---|---|---|
5K(5 km)YOUR RACE | 25:00 | 5:00 |
10K(10 km) | 52:07 | 5:12 |
15K(15 km) | 1:20:06 | 5:20 |
Half Marathon(21.0975 km) | 1:55:00 | 5:27 |
30K(30 km) | 2:47:01 | 5:34 |
Marathon(42.195 km) | 3:59:46 | 5:40 |
Ready to race?
Find upcoming events in New Zealand that match your fitness level
Important: These predictions assume you've trained properly for the target distance. Longer races require specific endurance training — your actual time may vary based on course difficulty, weather, and race-day conditions.