Swim Pace Calculator
2.5 km in 38 minutes is a pace of 1:31 per 100 m
Swimming 2.5 km in 38 minutes requires a pace of 1:31 per 100 m (15:10 per km / 24:24 per mile). This distance is a 2.5 km open-water distance.
At 1:31/100 m, each 25 m lap takes 0:23 and each 50 m length takes 0:46. 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 | 38 minutes |
| Pace per 100 m | 1:31 |
| Pace per km | 15:10 |
| Pace per mile | 24:24 |
Training paces at 1:31/100 m
Derived from your 1:31/100 m race pace using the same formula as the Swim Pace Calculator.
| Easy (warm-up / recovery) | 1:45/100 m |
| Aerobic base | 1:36/100 m |
| Threshold | 1:26/100 m |
| Build sets | 1:22/100 m |
| Sprint intervals | 1:17/100 m |
| Lap pace (25 m pool) | 0:23/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.