| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:30.20 | Neil Lepps 2026 | 2026-03-14 |
| 100m Breaststroke | 1:38.95 | Neil Lepps 2026 | 2026-03-14 |
| 100m Butterfly | 1:49.37 | Neil Lepps 2026 | 2026-03-14 |
| 100m Freestyle | 1:21.33 | Candy Cane Invitational | 2025-11-28 |
| 200m Freestyle | 3:07.75 | Blue Bears Invitational | 2026-01-16 |
| 200m IM | 3:23.49 | Neil Lepps 2026 | 2026-03-14 |
| 50m Backstroke | 42.41 | Candy Cane Invitational | 2025-11-28 |
| 50m Breaststroke | 45.46 | Candy Cane Invitational | 2025-11-28 |
| 50m Butterfly | 43.67 | Neil Lepps 2026 | 2026-03-14 |
| 50m Freestyle | 34.43 | Neil Lepps 2026 | 2026-03-14 |
Callin, Nikolai's top personal bests include 100m Backstroke (1:30.20), 100m Breaststroke (1:38.95), 100m Butterfly (1:49.37), 100m Freestyle (1:21.33), 200m Freestyle (3:07.75).
Callin, Nikolai swims for Strathcona County Silver Rays.
Callin, Nikolai has competed in 4 meets.