Swim Pace Calculator
2.5 km in 1 hour is a pace of 2:24 per 100 m
Swimming 2.5 km in 1 hour requires a pace of 2:24 per 100 m (24:00 per km / 38:37 per mile). This distance is a 2.5 km open-water distance.
At 2:24/100 m, each 25 m lap takes 0:36 and each 50 m length takes 1:12. To check a different time for 2.5 km, or to explore pool and open-water splits, use the calculator below.
Pace breakdown
| Distance | 2.5 km |
| Target time | 1 hour |
| Pace per 100 m | 2:24 |
| Pace per km | 24:00 |
| Pace per mile | 38:37 |
Training paces at 2:24/100 m
Derived from your 2:24/100 m race pace using the same formula as the Swim Pace Calculator.
| Easy (warm-up / recovery) | 2:46/100 m |
| Aerobic base | 2:31/100 m |
| Threshold | 2:17/100 m |
| Build sets | 2:10/100 m |
| Sprint intervals | 2:02/100 m |
| Lap pace (25 m pool) | 0:36/lap |
Try a different time for 2.5 km
- 2.5 km in 33 minutes = 1:19/100 m
- 2.5 km in 35 minutes = 1:24/100 m
- 2.5 km in 38 minutes = 1:31/100 m
- 2.5 km in 40 minutes = 1:36/100 m
- 2.5 km in 43 minutes = 1:43/100 m
- 2.5 km in 45 minutes = 1:48/100 m
- 2.5 km in 50 minutes = 2:00/100 m
- 2.5 km in 55 minutes = 2:12/100 m
- More times available above and below
Want to calculate a different pairing? Open the Swim Pace Calculator to enter any distance and time, see pool and open-water splits, and build your training zones.