# 21:00 5K: pace, race predictions & training paces

- **Pace**: 4:12/km · 6:46/mi
- **Speed**: 14.3 km/h · 8.9 mi/h

## Race predictions (Riegel)
- **10K**: 43:47 (4:23/km)
- **Half Marathon**: 1:36:36 (4:35/km)
- **Marathon**: 3:21:24 (4:46/km)

## Fitness
- **Estimated VO2max**: 47.0 ml/kg/min (Strong)

## Training paces
- **Easy**: 5:09–6:10/km
- **Marathon**: 4:39–5:05/km
- **Threshold**: 4:28–4:41/km
- **Interval**: 4:02–4:12/km
- **Repetition**: 3:44–3:53/km

## Splits to run this time
| km | Even | Negative split |
|---|---|---|
| 1 | 4:12 | 4:22 |
| 2 | 8:24 | 8:44 |
| 3 | 12:36 | 12:56 |
| 4 | 16:48 | 16:58 |
| 5 | 21:00 | 21:00 |

## In the heat
- **25 °C**: 21:27
- **30 °C**: 21:41

---
[Result Breakdown](https://calcpace.app/result) | [Calculators](https://calcpace.app/calculator.md)